--- title: Stream Session Thread Events url: https://platform.claude.com/docs/en/api/java/beta/sessions/threads/events/stream --- # Stream Session Thread Events `StreamResponse beta().sessions().threads().events().streamStreaming(params, requestOptions = RequestOptions.none())` **GET** `/v1/sessions/{session_id}/threads/{thread_id}/stream` Stream Session Thread Events ## Parameters - `EventStreamParams params` - `String sessionId` (path parameter) - `Optional threadId` (path parameter) - `Optional> eventDeltas` (query parameter) When set, this connection also receives streaming deltas (`event_start`, `event_delta`) while an event is being produced, before the event itself arrives. Deltas are best-effort; when the final event is produced it carries the complete content. A model request that ends early (an error or interrupt) produces no final event — its terminal `span.model_request_end` closes the preview. Accepts one or more event types to preview and may be repeated: `agent.message` streams `content_delta` fragments; `agent.thinking` is start-only — a signal that the agent has begun extended thinking, concluded by the `agent.thinking` event itself. Only previews of the requested event types are sent. - `AGENT_MESSAGE("agent.message")` - `AGENT_THINKING("agent.thinking")` - `Optional> betas` (header parameter) This endpoint is in beta: requests must send `managed-agents-2026-04-01` in this header. - `MESSAGE_BATCHES_2024_09_24("message-batches-2024-09-24")` - `PROMPT_CACHING_2024_07_31("prompt-caching-2024-07-31")` - `COMPUTER_USE_2024_10_22("computer-use-2024-10-22")` - `COMPUTER_USE_2025_01_24("computer-use-2025-01-24")` - `PDFS_2024_09_25("pdfs-2024-09-25")` - `TOKEN_COUNTING_2024_11_01("token-counting-2024-11-01")` - `TOKEN_EFFICIENT_TOOLS_2025_02_19("token-efficient-tools-2025-02-19")` - `OUTPUT_128K_2025_02_19("output-128k-2025-02-19")` - `FILES_API_2025_04_14("files-api-2025-04-14")` - `MCP_CLIENT_2025_04_04("mcp-client-2025-04-04")` - `MCP_CLIENT_2025_11_20("mcp-client-2025-11-20")` - `DEV_FULL_THINKING_2025_05_14("dev-full-thinking-2025-05-14")` - `INTERLEAVED_THINKING_2025_05_14("interleaved-thinking-2025-05-14")` - `CODE_EXECUTION_2025_05_22("code-execution-2025-05-22")` - `EXTENDED_CACHE_TTL_2025_04_11("extended-cache-ttl-2025-04-11")` - `CONTEXT_1M_2025_08_07("context-1m-2025-08-07")` - `CONTEXT_MANAGEMENT_2025_06_27("context-management-2025-06-27")` - `MODEL_CONTEXT_WINDOW_EXCEEDED_2025_08_26("model-context-window-exceeded-2025-08-26")` - `SKILLS_2025_10_02("skills-2025-10-02")` - `FAST_MODE_2026_02_01("fast-mode-2026-02-01")` - `OUTPUT_300K_2026_03_24("output-300k-2026-03-24")` - `USER_PROFILES_2026_03_24("user-profiles-2026-03-24")` - `USER_PROFILES_2026_08_18("user-profiles-2026-08-18")` - `USER_PROFILES_2026_09_04("user-profiles-2026-09-04")` - `ADVISOR_TOOL_2026_03_01("advisor-tool-2026-03-01")` - `MANAGED_AGENTS_2026_04_01("managed-agents-2026-04-01")` - `CACHE_DIAGNOSIS_2026_04_07("cache-diagnosis-2026-04-07")` - `DREAMING_2026_04_21("dreaming-2026-04-21")` - `THINKING_TOKEN_COUNT_2026_05_13("thinking-token-count-2026-05-13")` - `SERVER_SIDE_FALLBACK_2026_06_01("server-side-fallback-2026-06-01")` - `SERVER_SIDE_FALLBACK_2026_07_01("server-side-fallback-2026-07-01")` - `FALLBACK_CREDIT_2026_06_01("fallback-credit-2026-06-01")` - `FALLBACK_CREDIT_2026_07_01("fallback-credit-2026-07-01")` - `AGENT_MEMORY_2026_07_22("agent-memory-2026-07-22")` - `MID_CONVERSATION_TOOL_CHANGES_2026_07_01("mid-conversation-tool-changes-2026-07-01")` - `COMPACT_2026_01_12("compact-2026-01-12")` - `COMPUTER_USE_2025_11_24("computer-use-2025-11-24")` - `MCP_TUNNELS_2026_06_22("mcp-tunnels-2026-06-22")` - `STRUCTURED_OUTPUTS_2025_11_13("structured-outputs-2025-11-13")` - `TASK_BUDGETS_2026_03_13("task-budgets-2026-03-13")` - `THINKING_DISPLAY_UPDATES_2026_08_18("thinking-display-updates-2026-08-18")` - `CE_USER_MANAGEMENT_2026_07_13("ce-user-management-2026-07-13")` - `MID_CONVERSATION_OUTPUT_CONFIG_2026_07_01("mid-conversation-output-config-2026-07-01")` - `THINKING_BINDING_CONTROLS_2026_08_01("thinking-binding-controls-2026-08-01")` - `MID_CONVERSATION_SYSTEM_CLEAR_AT_2026_08_21("mid-conversation-system-clear-at-2026-08-21")` - `COMPACT_2026_09_04("compact-2026-09-04")` - `INLINE_TOOLS_2026_09_15("inline-tools-2026-09-15")` - `MCP_CLIENT_2026_09_15("mcp-client-2026-09-15")` - `CE_PLUGINS_2026_09_01("ce-plugins-2026-09-01")` - `SPEND_LIMIT_READS_2026_09_26("spend-limit-reads-2026-09-26")` - `TELEMETRY_DESTINATIONS_2026_08_11("telemetry-destinations-2026-08-11")` - `Optional workspaceId` (header parameter) Optional header to select the Workspace for this request. The value is a Workspace ID (for example, `wrkspc_011CZkZaBF1tNoB5wlCeusgy`). Only needed for credentials that can act on more than one Workspace. A credential that belongs to a specific Workspace may omit it; if sent, it must match that Workspace. ## Returns - `class BetaManagedAgentsStreamSessionThreadEvents: union` Server-sent event in a single thread's stream. - `class BetaManagedAgentsUserMessageEvent` A user message event in the session conversation. - `Type type` - `String id` Unique identifier for this event. - `List content` Array of content blocks comprising the user message. - `class BetaManagedAgentsTextBlock` Regular text content. - `Type type` - `String text` The text content. minLength: 1 - `class BetaManagedAgentsImageBlock` Image content specified directly as base64 data or as a reference via a URL. - `Type type` - `Source source` The source of the image data. - `class BetaManagedAgentsBase64ImageSource` Base64-encoded image data. - `Type type` - `String data` Base64-encoded image data. minLength: 1 - `String mediaType` MIME type of the image (e.g., "image/png", "image/jpeg", "image/gif", "image/webp"). minLength: 1 - `class BetaManagedAgentsUrlImageSource` Image referenced by URL. - `Type type` - `String url` URL of the image to fetch. minLength: 1 - `class BetaManagedAgentsFileImageSource` Image referenced by file ID. - `Type type` - `String fileId` ID of a previously uploaded file. minLength: 1 - `class BetaManagedAgentsDocumentBlock` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `Type type` - `Source source` The source of the document data. - `class BetaManagedAgentsBase64DocumentSource` Base64-encoded document data. - `Type type` - `String data` Base64-encoded document data. minLength: 1 - `String mediaType` MIME type of the document (e.g., "application/pdf"). minLength: 1 - `class BetaManagedAgentsPlainTextDocumentSource` Plain text document content. - `Type type` - `String data` The plain text content. minLength: 1 - `MediaType mediaType` MIME type of the text content. Must be "text/plain". - `class BetaManagedAgentsUrlDocumentSource` Document referenced by URL. - `Type type` - `String url` URL of the document to fetch. minLength: 1 - `class BetaManagedAgentsFileDocumentSource` Document referenced by file ID. - `Type type` - `String fileId` ID of a previously uploaded file. minLength: 1 - `Optional context` Additional context about the document for the model. - `Optional title` The title of the document. - `class BetaManagedAgentsRedactedBlock` Placeholder for content withheld by Anthropic model policy. - `Type type` - `Optional processedAt` Timestamp when the agent finished processing this message. format: date-time - `class BetaManagedAgentsUserInterruptEvent` An interrupt event that pauses agent execution and returns control to the user. - `Type type` - `String id` Unique identifier for this event. - `Optional processedAt` Timestamp when the interrupt was processed. format: date-time - `Optional sessionThreadId` If absent, interrupts every non-archived thread in a multiagent session (or the primary alone in a single-agent session). If present, interrupts only the named thread. - `class BetaManagedAgentsUserToolConfirmationEvent` A tool confirmation event that approves or denies a pending tool execution. - `Type type` - `String id` Unique identifier for this event. - `Result result` The confirmation result: 'allow' or 'deny'. - `ALLOW("allow")` - `DENY("deny")` - `String toolUseId` The id of the `agent.tool_use` or `agent.mcp_tool_use` event this result corresponds to, which can be found in the last `session.status_idle` [event's](https://platform.claude.com/docs/en/api/beta/sessions/events/list?sdk_languages=java#beta_managed_agents_session_requires_action.event_ids) `stop_reason.event_ids` field. - `Optional denyMessage` Optional message providing context for a 'deny' decision. Only allowed when result is 'deny'. maxLength: 10000 - `Optional processedAt` Timestamp when the confirmation was processed. format: date-time - `Optional sessionThreadId` Set by the server to the subagent thread this confirmation was routed to. Omitted when it was routed to the primary thread. - `class BetaManagedAgentsUserCustomToolResultEvent` Event sent by the client providing the result of a custom tool execution. - `Type type` - `String id` Unique identifier for this event. - `String customToolUseId` The id of the `agent.custom_tool_use` event this result corresponds to. It is also listed in the last `session.status_idle` [event's](https://platform.claude.com/docs/en/api/beta/sessions/events/list?sdk_languages=java#beta_managed_agents_session_requires_action.event_ids) `stop_reason.event_ids` field. - `Optional> content` The result content returned by the tool. - `class BetaManagedAgentsTextBlock` Regular text content. - `class BetaManagedAgentsImageBlock` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `class BetaManagedAgentsSearchResultBlock` A block containing a web search result. - `Type type` - `BetaManagedAgentsSearchResultCitations citations` Citation settings for this search result. - `boolean enabled` Whether citations are enabled for this search result. - `List content` Array of text content blocks from the search result. - `Type type` - `String text` The text content. minLength: 1 - `String source` The URL source of the search result. minLength: 1 - `String title` The title of the search result. minLength: 1 - `Optional isError` Whether the tool execution resulted in an error. - `Optional processedAt` Timestamp when this result was processed. format: date-time - `Optional sessionThreadId` Set by the server to the subagent thread this result was routed to. Omitted when it was routed to the primary thread. - `class BetaManagedAgentsAgentCustomToolUseEvent` Event emitted when the agent calls a custom tool. The session goes idle until the client sends a `user.custom_tool_result` event with the result. The client can send it as soon as this event arrives, without waiting for `session.status_idle`. - `Type type` - `String id` Unique identifier for this event. - `Input input` Input parameters for the tool call. - `String name` Name of the custom tool being called. - `LocalDateTime processedAt` Timestamp when this tool use was processed. format: date-time - `Optional sessionThreadId` When set, this event was cross-posted from a subagent's thread to surface its custom tool use on the primary thread's stream. Empty on the thread's own events. Informational only: the server routes the matching `user.custom_tool_result` by `custom_tool_use_id`, so clients do not send it back. - `class BetaManagedAgentsAgentMessageEvent` An agent response event in the session conversation. - `Type type` - `String id` Unique identifier for this event. - `List content` Array of text blocks comprising the agent response. - `class BetaManagedAgentsTextBlock` Regular text content. - `class BetaManagedAgentsRedactedBlock` Placeholder for content withheld by Anthropic model policy. - `LocalDateTime processedAt` Timestamp when this response was generated. format: date-time - `class BetaManagedAgentsAgentThinkingEvent` Indicates the agent is making forward progress via extended thinking. A progress signal, not a content carrier. - `Type type` - `String id` Unique identifier for this event. - `LocalDateTime processedAt` Timestamp when this thinking was produced. format: date-time - `class BetaManagedAgentsAgentMcpToolUseEvent` Event emitted when the agent invokes a tool provided by an MCP server. - `Type type` - `String id` Unique identifier for this event. - `Input input` Input parameters for the tool call. - `String mcpServerName` Name of the MCP server providing the tool. - `String name` Name of the MCP tool being used. - `LocalDateTime processedAt` Timestamp when this event was processed. format: date-time - `Optional evaluatedPermission` The evaluated permission policy for this tool invocation. - `ALLOW("allow")` - `ASK("ask")` - `DENY("deny")` - `Optional evaluation` Which resolved permission_policy produced evaluated_permission: always_allow, always_ask, or auto (with the server's per-invocation judgement). Absent only when the server refused the call before any policy applied (for example, the named tool is not enabled in the session); such a refusal has evaluated_permission deny. An event recorded before this field existed reads as the arm its evaluated_permission implies (always_allow for allow, always_ask for ask). - `class BetaManagedAgentsAgentToolEvaluationAlwaysAllow` The resolved permission_policy was always_allow; accompanies evaluated_permission "allow". - `JsonValue type = "always_allow"` - `class BetaManagedAgentsAgentToolEvaluationAlwaysAsk` The resolved permission_policy was always_ask; accompanies evaluated_permission "ask". - `JsonValue type = "always_ask"` - `class BetaManagedAgentsAgentToolEvaluationAuto` The resolved permission_policy was auto: the server judged this invocation individually. - `JsonValue type = "auto"` - `BetaManagedAgentsAgentAutoEvaluatedPermission evaluatedPermission` The server's judgement for this invocation. - `class BetaManagedAgentsAgentAutoEvaluatedPermissionAllow` The server judged the invocation safe to execute without client approval. - `JsonValue type = "allow"` - `class BetaManagedAgentsAgentAutoEvaluatedPermissionAsk` The server reached no judgement; the invocation is held for client approval. - `JsonValue type = "ask"` - `String reasonCode` The judgement's grounds in registry-bound terms, for client branching and audit rather than end-user display. Open registry; currently "indeterminate" (no judgement was reached). Clients must tolerate values outside this set. maxLength: 64 - `class BetaManagedAgentsAgentAutoEvaluatedPermissionDeny` The server judged the invocation high-risk; it does not execute and a synthetic error tool result is appended. - `JsonValue type = "deny"` - `String reasonCode` The judgement's grounds in registry-bound terms. Open registry; currently "high_risk" (judged high-risk; the call does not run). Clients must tolerate values outside this set. maxLength: 64 - `Optional sessionThreadId` When set, this event was cross-posted from a subagent's thread to surface its permission request on the primary thread's stream. Empty on the thread's own events. Informational only: the server routes the matching `user.tool_confirmation` by `tool_use_id`, so clients do not send it back. - `class BetaManagedAgentsAgentMcpToolResultEvent` Event representing the result of an MCP tool execution. - `Type type` - `String id` Unique identifier for this event. - `String mcpToolUseId` The id of the `agent.mcp_tool_use` event this result corresponds to. - `LocalDateTime processedAt` Timestamp when this event was processed. format: date-time - `Optional> content` The result content returned by the tool. - `class BetaManagedAgentsTextBlock` Regular text content. - `class BetaManagedAgentsImageBlock` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `class BetaManagedAgentsSearchResultBlock` A block containing a web search result. - `Optional isError` Whether the tool execution resulted in an error. - `class BetaManagedAgentsAgentToolUseEvent` Event emitted when the agent invokes a built-in agent tool. - `Type type` - `String id` Unique identifier for this event. - `Input input` Input parameters for the tool call. - `String name` Name of the agent tool being used. - `LocalDateTime processedAt` Timestamp when this event was processed. format: date-time - `Optional evaluatedPermission` The evaluated permission policy for this tool invocation. - `Optional evaluation` Which resolved permission_policy produced evaluated_permission: always_allow, always_ask, or auto (with the server's per-invocation judgement). Absent only when the server refused the call before any policy applied (for example, the named tool is not enabled in the session); such a refusal has evaluated_permission deny. An event recorded before this field existed reads as the arm its evaluated_permission implies (always_allow for allow, always_ask for ask). - `Optional sessionThreadId` When set, this event was cross-posted from a subagent's thread to surface its permission request on the primary thread's stream. Empty on the thread's own events. Informational only: the server routes the matching `user.tool_confirmation` or `user.tool_result` by `tool_use_id`, so clients do not send it back. - `class BetaManagedAgentsAgentToolResultEvent` Event representing the result of an agent tool execution. - `Type type` - `String id` Unique identifier for this event. - `LocalDateTime processedAt` Timestamp when this event was processed. format: date-time - `String toolUseId` The id of the `agent.tool_use` event this result corresponds to. - `Optional> content` The result content returned by the tool. - `class BetaManagedAgentsTextBlock` Regular text content. - `class BetaManagedAgentsImageBlock` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `class BetaManagedAgentsSearchResultBlock` A block containing a web search result. - `Optional isError` Whether the tool execution resulted in an error. - `class BetaManagedAgentsAgentThreadMessageReceivedEvent` Delivery event written to the target thread's input stream when an agent-to-agent message arrives. - `Type type` - `String id` Unique identifier for this event. - `List content` Message content blocks. - `class BetaManagedAgentsTextBlock` Regular text content. - `class BetaManagedAgentsImageBlock` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `class BetaManagedAgentsRedactedBlock` Placeholder for content withheld by Anthropic model policy. - `String fromSessionThreadId` Public `sthr_` ID of the thread that sent the message. - `LocalDateTime processedAt` Timestamp when the message was received. format: date-time - `Optional fromAgentName` Name of the callable agent this message came from. Absent when received from the primary agent. - `class BetaManagedAgentsAgentThreadMessageSentEvent` Observability event emitted to the sender's output stream when an agent-to-agent message is sent. - `Type type` - `String id` Unique identifier for this event. - `List content` Message content blocks. - `class BetaManagedAgentsTextBlock` Regular text content. - `class BetaManagedAgentsImageBlock` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `class BetaManagedAgentsRedactedBlock` Placeholder for content withheld by Anthropic model policy. - `LocalDateTime processedAt` Timestamp when the message was sent. format: date-time - `String toSessionThreadId` Public `sthr_` ID of the thread the message was sent to. - `Optional toAgentName` Name of the callable agent this message was sent to. Absent when sent to the primary agent. - `class BetaManagedAgentsAgentThreadContextCompactedEvent` Indicates that context compaction (summarization) occurred during the session. - `Type type` - `String id` Unique identifier for this event. - `LocalDateTime processedAt` Timestamp when compaction was processed. format: date-time - `class BetaManagedAgentsSessionErrorEvent` An error event indicating a problem occurred during session execution. - `Type type` - `String id` Unique identifier for this event. - `Error error` - `class BetaManagedAgentsUnknownError` An unknown or unexpected error occurred during session execution. A fallback variant; clients that don't recognize a new error code can match on `retry_status` and `message` alone. - `Type type` - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next. - `class BetaManagedAgentsRetryStatusRetrying` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `Type type` - `class BetaManagedAgentsRetryStatusExhausted` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `Type type` - `class BetaManagedAgentsRetryStatusTerminal` The session encountered a terminal error and will transition to `terminated` state. - `Type type` - `class BetaManagedAgentsModelOverloadedError` The model is currently overloaded. Emitted after automatic retries are exhausted. - `Type type` - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next. - `class BetaManagedAgentsRetryStatusRetrying` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `class BetaManagedAgentsRetryStatusExhausted` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal` The session encountered a terminal error and will transition to `terminated` state. - `class BetaManagedAgentsModelRateLimitedError` The model request was rate-limited. - `Type type` - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next. - `class BetaManagedAgentsRetryStatusRetrying` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `class BetaManagedAgentsRetryStatusExhausted` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal` The session encountered a terminal error and will transition to `terminated` state. - `class BetaManagedAgentsModelRequestFailedError` A model request failed for a reason other than overload or rate-limiting. - `Type type` - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next. - `class BetaManagedAgentsRetryStatusRetrying` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `class BetaManagedAgentsRetryStatusExhausted` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal` The session encountered a terminal error and will transition to `terminated` state. - `class BetaManagedAgentsMcpConnectionFailedError` Failed to connect to an MCP server. - `Type type` - `String mcpServerName` Name of the MCP server that failed to connect. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next. - `class BetaManagedAgentsRetryStatusRetrying` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `class BetaManagedAgentsRetryStatusExhausted` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal` The session encountered a terminal error and will transition to `terminated` state. - `class BetaManagedAgentsMcpAuthenticationFailedError` Authentication to an MCP server failed. - `Type type` - `String mcpServerName` Name of the MCP server that failed authentication. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next. - `class BetaManagedAgentsRetryStatusRetrying` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `class BetaManagedAgentsRetryStatusExhausted` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal` The session encountered a terminal error and will transition to `terminated` state. - `class BetaManagedAgentsBillingError` The caller's organization or workspace cannot make model requests — out of credits or spend limit reached. Retrying with the same credentials will not succeed; the caller must resolve the billing state. - `Type type` - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next. - `class BetaManagedAgentsRetryStatusRetrying` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `class BetaManagedAgentsRetryStatusExhausted` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal` The session encountered a terminal error and will transition to `terminated` state. - `class BetaManagedAgentsCredentialHostUnreachableError` An `environment_variable` credential's `auth.networking.allowed_hosts` includes a host the environment's network policy does not permit. - `Type type` - `String credentialId` ID of the affected credential. - `String message` Human-readable error description. - `RetryStatus retryStatus` What the client should do next. - `class BetaManagedAgentsRetryStatusRetrying` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `class BetaManagedAgentsRetryStatusExhausted` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal` The session encountered a terminal error and will transition to `terminated` state. - `String vaultId` ID of the vault containing the affected credential. - `class BetaManagedAgentsRepositoryAuthenticationError` The repository host rejected the credentials, or required credentials and received none. - `JsonValue type = "repository_authentication_error"` - `String message` Human-readable error description. - `Optional repositoryUrl` URL of the repository that could not be cloned. Null when it could not be identified. - `RetryStatus retryStatus` What the client should do next. Always `retrying`: the session keeps running without the repository. - `class BetaManagedAgentsRetryStatusRetrying` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `class BetaManagedAgentsRetryStatusExhausted` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal` The session encountered a terminal error and will transition to `terminated` state. - `class BetaManagedAgentsRepositoryForbiddenError` The repository host refused access to the repository. - `JsonValue type = "repository_forbidden_error"` - `String message` Human-readable error description. - `Optional repositoryUrl` URL of the repository that could not be cloned. Null when it could not be identified. - `RetryStatus retryStatus` What the client should do next. Always `retrying`: the session keeps running without the repository. - `class BetaManagedAgentsRetryStatusRetrying` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `class BetaManagedAgentsRetryStatusExhausted` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal` The session encountered a terminal error and will transition to `terminated` state. - `class BetaManagedAgentsRepositoryNotFoundError` The repository host reported the repository as not found. - `JsonValue type = "repository_not_found_error"` - `String message` Human-readable error description. - `Optional repositoryUrl` URL of the repository that could not be cloned. Null when it could not be identified. - `RetryStatus retryStatus` What the client should do next. Always `retrying`: the session keeps running without the repository. - `class BetaManagedAgentsRetryStatusRetrying` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `class BetaManagedAgentsRetryStatusExhausted` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal` The session encountered a terminal error and will transition to `terminated` state. - `class BetaManagedAgentsRepositoryCheckoutError` The requested branch or commit does not exist in the repository. - `JsonValue type = "repository_checkout_error"` - `String message` Human-readable error description. - `Optional repositoryUrl` URL of the repository that could not be cloned. Null when it could not be identified. - `RetryStatus retryStatus` What the client should do next. Always `retrying`: the session keeps running without the repository. - `class BetaManagedAgentsRetryStatusRetrying` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `class BetaManagedAgentsRetryStatusExhausted` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal` The session encountered a terminal error and will transition to `terminated` state. - `class BetaManagedAgentsRepositoryCloneError` The repository could not be cloned. - `JsonValue type = "repository_clone_error"` - `String message` Human-readable error description. - `Optional repositoryUrl` URL of the repository that could not be cloned. Null when it could not be identified. - `RetryStatus retryStatus` What the client should do next. Always `retrying`: the session keeps running without the repository. - `class BetaManagedAgentsRetryStatusRetrying` The server is retrying automatically. Client should wait; the same error type may fire again as retrying, then once as exhausted when the retry budget runs out. - `class BetaManagedAgentsRetryStatusExhausted` This turn is dead; queued inputs are flushed and the session returns to idle. Client may send a new prompt. - `class BetaManagedAgentsRetryStatusTerminal` The session encountered a terminal error and will transition to `terminated` state. - `LocalDateTime processedAt` Timestamp when the error occurred. format: date-time - `class BetaManagedAgentsSessionStatusRescheduledEvent` Indicates the session is recovering from an error state and is rescheduled for execution. - `Type type` - `String id` Unique identifier for this event. - `LocalDateTime processedAt` Timestamp of status change. format: date-time - `class BetaManagedAgentsSessionStatusRunningEvent` Indicates the session is actively running and the agent is working. - `Type type` - `String id` Unique identifier for this event. - `LocalDateTime processedAt` Timestamp of status change. format: date-time - `class BetaManagedAgentsSessionStatusIdleEvent` Indicates the agent has paused and is awaiting user input. - `Type type` - `String id` Unique identifier for this event. - `LocalDateTime processedAt` Timestamp of status change. format: date-time - `Optional stopDetails` Structured information about why the session stopped. `null` when there is nothing more to report. - `JsonValue type = "refusal"` - `Optional category` The policy category that triggered the refusal, or `null` when there is no named category. New values can be added over time. - `CYBER("cyber")` - `BIO("bio")` - `FRONTIER_LLM("frontier_llm")` - `REASONING_EXTRACTION("reasoning_extraction")` - `GENERAL_HARMS("general_harms")` - `Optional explanation` Human-readable explanation of the refusal, or `null` when none is available. The wording can change, so do not parse it. - `StopReason stopReason` - `class BetaManagedAgentsSessionEndTurn` The agent completed its turn naturally and is ready for the next user message. - `Type type` - `class BetaManagedAgentsSessionRequiresAction` The agent is idle waiting on one or more blocking user-input events (tool confirmation, custom tool result, etc.). Resolving all of them transitions the session back to running. - `Type type` - `List eventIds` The ids of events the agent is blocked on. Resolving fewer than all re-emits `session.status_idle` with the remainder. - `class BetaManagedAgentsSessionRetriesExhausted` The turn ended because repeated errors exhausted the retry budget or an error escalated to `retry_status: 'exhausted'`. - `Type type` - `class BetaManagedAgentsSessionBudgetReached` The agent stopped because the session's tracked list cost reached its budget, or because its usage includes a model with no list price (which the budget cannot measure). Raise the budget to continue — or, if raising is rejected because a model has no list price, remove the budget. - `Type type` - `class BetaManagedAgentsSessionRefusal` The turn ended because the model's response was refused, for example by a safety classifier. - `JsonValue type = "refusal"` - `class BetaManagedAgentsSessionStatusTerminatedEvent` Indicates the session has terminated, either due to an error or completion. - `Type type` - `String id` Unique identifier for this event. - `LocalDateTime processedAt` Timestamp of status change. format: date-time - `class BetaManagedAgentsSessionThreadCreatedEvent` Emitted when a child thread is created. Written to the parent thread's output stream so clients observing the session see child creation. - `Type type` - `String id` Unique identifier for this event. - `String agentName` Name of the callable agent the thread runs. - `LocalDateTime processedAt` Timestamp when the thread was created. format: date-time - `String sessionThreadId` Public `sthr_` ID of the newly created thread. - `Optional workflowRunId` Identifier of the workflow run that created the thread, or `null` for any other thread. - `class BetaManagedAgentsSpanOutcomeEvaluationStartEvent` Emitted when an outcome evaluation cycle begins. - `Type type` - `String id` Unique identifier for this event. - `long iteration` 0-indexed revision cycle. 0 is the first evaluation; 1 is the re-evaluation after the first revision; etc. format: int32 - `String outcomeId` The `outc_` ID of the outcome being evaluated. - `LocalDateTime processedAt` Timestamp when outcome evaluation started. format: date-time - `class BetaManagedAgentsSpanOutcomeEvaluationEndEvent` Emitted when an outcome evaluation cycle completes. Carries the verdict and aggregate token usage. A verdict of `needs_revision` means another evaluation cycle follows; `satisfied`, `max_iterations_reached`, `failed`, or `interrupted` are terminal — no further evaluation cycles follow. - `Type type` - `String id` Unique identifier for this event. - `String explanation` Human-readable explanation of the verdict. For `needs_revision`, describes which criteria failed and why. - `long iteration` 0-indexed revision cycle, matching the corresponding `span.outcome_evaluation_start`. format: int32 - `String outcomeEvaluationStartId` The id of the corresponding `span.outcome_evaluation_start` event. - `String outcomeId` The `outc_` ID of the outcome being evaluated. - `LocalDateTime processedAt` Timestamp when outcome evaluation ended. format: date-time - `String result` Evaluation verdict. 'satisfied': criteria met, session goes idle. 'needs_revision': criteria not met, another revision cycle follows. 'max_iterations_reached': evaluation budget exhausted with criteria still unmet — one final acknowledgment turn follows before the session goes idle, but no further evaluation runs. 'failed': grader determined the rubric does not apply to the deliverables. 'interrupted': user sent an interrupt while evaluation was in progress. - `BetaManagedAgentsSpanModelUsage usage` Aggregate token usage for this evaluation cycle. Sums across all grader model requests within the cycle. - `long cacheCreationInputTokens` Tokens used to create prompt cache in this request. format: int32 - `long cacheReadInputTokens` Tokens read from prompt cache in this request. format: int32 - `long inputTokens` Input tokens consumed by this request. format: int32 - `long outputTokens` Output tokens generated by this request. format: int32 - `Optional speed` Inference speed tier this request actually ran at. Mirrors `usage.speed` on /v1/messages. Only present when the fast-mode beta is active. - `STANDARD("standard")` - `FAST("fast")` - `class BetaManagedAgentsSpanModelRequestStartEvent` Emitted when a model request is initiated by the agent. - `Type type` - `String id` Unique identifier for this event. - `LocalDateTime processedAt` Timestamp when the model request started. format: date-time - `class BetaManagedAgentsSpanModelRequestEndEvent` Emitted when a model request completes. - `Type type` - `String id` Unique identifier for this event. - `Optional isError` Whether the model request resulted in an error. - `String modelRequestStartId` The id of the corresponding `span.model_request_start` event. - `BetaManagedAgentsSpanModelUsage modelUsage` Token usage for this model request. - `LocalDateTime processedAt` Timestamp when the model request completed. format: date-time - `class BetaManagedAgentsSpanOutcomeEvaluationOngoingEvent` Periodic heartbeat emitted while an outcome evaluation cycle is in progress. Distinguishes 'evaluation is actively running' from 'evaluation is stuck' between the corresponding `span.outcome_evaluation_start` and `span.outcome_evaluation_end` events. - `Type type` - `String id` Unique identifier for this event. - `long iteration` 0-indexed revision cycle, matching the corresponding `span.outcome_evaluation_start`. format: int32 - `String outcomeId` The `outc_` ID of the outcome being evaluated. - `LocalDateTime processedAt` Timestamp when this heartbeat was emitted. format: date-time - `class BetaManagedAgentsUserDefineOutcomeEvent` Echo of a `user.define_outcome` input event. Carries the server-generated `outcome_id` that subsequent `span.outcome_evaluation_*` events reference. - `Type type` - `String id` Unique identifier for this event. - `String description` What the agent should produce. Copied from the input event. - `Optional maxIterations` Evaluate-then-revise cycles before giving up. Default 3, max 20. format: int32 - `String outcomeId` Server-generated `outc_` ID for this outcome. Referenced by `span.outcome_evaluation_*` events and the session's `outcome_evaluations` list. - `LocalDateTime processedAt` Timestamp when the outcome was accepted. format: date-time - `Rubric rubric` How to grade the outcome. File rubrics are currently resolved to their text content; clients should handle both variants. - `class BetaManagedAgentsFileRubric` Rubric referenced by a file uploaded via the Files API. - `Type type` - `String fileId` ID of the rubric file. - `class BetaManagedAgentsTextRubric` Rubric content provided inline as text. - `Type type` - `String content` Rubric content. Plain text or markdown — the grader treats it as freeform text. - `class BetaManagedAgentsSessionDeletedEvent` Emitted when a session has been deleted. Terminates any active event stream — no further events will be emitted for this session. - `Type type` - `String id` Unique identifier for this event. - `LocalDateTime processedAt` Timestamp when the session was deleted. format: date-time - `class BetaManagedAgentsSessionThreadStatusRunningEvent` A session thread has begun executing. Emitted on the thread's own stream and cross-posted to the primary stream for child threads. - `Type type` - `String id` Unique identifier for this event. - `String agentName` Name of the agent the thread runs. - `LocalDateTime processedAt` Timestamp of the status transition. format: date-time - `String sessionThreadId` Public sthr_ ID of the thread that started running. - `class BetaManagedAgentsSessionThreadStatusIdleEvent` A session thread has yielded and is awaiting input. Emitted on the thread's own stream and cross-posted to the primary stream for child threads. - `Type type` - `String id` Unique identifier for this event. - `String agentName` Name of the agent the thread runs. - `LocalDateTime processedAt` Timestamp of the status transition. format: date-time - `String sessionThreadId` Public sthr_ ID of the thread that went idle. - `Optional stopDetails` Structured information about why the thread stopped. `null` when there is nothing more to report. - `StopReason stopReason` - `class BetaManagedAgentsSessionEndTurn` The agent completed its turn naturally and is ready for the next user message. - `class BetaManagedAgentsSessionRequiresAction` The agent is idle waiting on one or more blocking user-input events (tool confirmation, custom tool result, etc.). Resolving all of them transitions the session back to running. - `class BetaManagedAgentsSessionRetriesExhausted` The turn ended because repeated errors exhausted the retry budget or an error escalated to `retry_status: 'exhausted'`. - `class BetaManagedAgentsSessionBudgetReached` The agent stopped because the session's tracked list cost reached its budget, or because its usage includes a model with no list price (which the budget cannot measure). Raise the budget to continue — or, if raising is rejected because a model has no list price, remove the budget. - `class BetaManagedAgentsSessionRefusal` The turn ended because the model's response was refused, for example by a safety classifier. - `class BetaManagedAgentsSessionThreadStatusTerminatedEvent` A session thread has terminated and will accept no further input. Emitted on the thread's own stream and cross-posted to the primary stream for child threads. - `Type type` - `String id` Unique identifier for this event. - `String agentName` Name of the agent the thread runs. - `LocalDateTime processedAt` Timestamp of the status transition. format: date-time - `String sessionThreadId` Public sthr_ ID of the thread that terminated. - `class BetaManagedAgentsUserToolResultEvent` Event sent by the client providing the result of an agent-toolset tool execution. Only valid on `self_hosted` environments, where sandbox-routed tools are executed by the client rather than the server. - `Type type` - `String id` Unique identifier for this event. - `String toolUseId` The id of the `agent.tool_use` event this result corresponds to, which can be found in the last `session.status_idle` [event's](https://platform.claude.com/docs/en/api/beta/sessions/events/list?sdk_languages=java#beta_managed_agents_session_requires_action.event_ids) `stop_reason.event_ids` field. - `Optional> content` The result content returned by the tool. - `class BetaManagedAgentsTextBlock` Regular text content. - `class BetaManagedAgentsImageBlock` Image content specified directly as base64 data or as a reference via a URL. - `class BetaManagedAgentsDocumentBlock` Document content, either specified directly as base64 data, as text, or as a reference via a URL. - `class BetaManagedAgentsSearchResultBlock` A block containing a web search result. - `Optional isError` Whether the tool execution resulted in an error. - `Optional processedAt` Timestamp when this result was processed. format: date-time - `Optional sessionThreadId` Set by the server to the subagent thread this result was routed to. Omitted when it was routed to the primary thread. - `class BetaManagedAgentsSessionThreadStatusRescheduledEvent` A session thread hit a transient error and is retrying automatically. Emitted on the thread's own stream and cross-posted to the primary stream for child threads. - `Type type` - `String id` Unique identifier for this event. - `String agentName` Name of the agent the thread runs. - `LocalDateTime processedAt` Timestamp of the status transition. format: date-time - `String sessionThreadId` Public sthr_ ID of the thread that is retrying. - `class BetaManagedAgentsSessionUpdatedEvent` Emitted when an UpdateSession request changed at least one field. Carries only the fields that changed; absent fields were not part of the update. The new configuration applies from the next turn. - `Type type` - `String id` Unique identifier for this event. - `LocalDateTime processedAt` Timestamp when the update was applied. format: date-time - `Optional agent` The session's effective agent configuration after the update. Present only when the update changed `agent` (tools or mcp_servers); when present it is the full materialised snapshot, not a diff. - `Type type` - `String id` - `Optional description` - `BetaManagedAgentsExecutionIdentity executionIdentity` Execution principal snapshotted from the agent at session creation. Always present; `{"type": "service_account"}` when runs carry no customer-named principal. - `class BetaManagedAgentsAwsRoleExecutionIdentity` An AWS IAM role principal as returned in API responses. - `JsonValue type = "aws_role"` - `String roleArn` The IAM role's ARN. - `class BetaManagedAgentsServiceAccountExecutionIdentity` The Anthropic-managed service account as returned in API responses. - `JsonValue type = "service_account"` - `List mcpServers` - `Type type` - `String name` - `String url` - `BetaManagedAgentsModelConfig model` Model identifier and configuration. - `BetaManagedAgentsModel id` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `CLAUDE_HAIKU_5_5("claude-haiku-5-5")` Fastest model for high-volume, real-time tasks - `CLAUDE_SONNET_5_5("claude-sonnet-5-5")` Efficient model for coding and agents - `CLAUDE_OPUS_5_5("claude-opus-5-5")` Powerful intelligence for coding, knowledge work, and long-running agents - `CLAUDE_FABLE_5_1("claude-fable-5-1")` Frontier intelligence for ambitious tasks across coding, scientific discovery, and enterprise workflows - `CLAUDE_SONNET_5("claude-sonnet-5")` Efficient model for coding and agents - `CLAUDE_FABLE_5("claude-fable-5")` Next generation of intelligence for the hardest knowledge work and coding problems - `CLAUDE_OPUS_5("claude-opus-5")` Powerful intelligence for long-running agents and coding - `CLAUDE_OPUS_4_8("claude-opus-4-8")` Powerful intelligence for long-running agents and coding - `CLAUDE_OPUS_4_7("claude-opus-4-7")` Powerful intelligence for long-running agents and coding - `CLAUDE_OPUS_4_6("claude-opus-4-6")` Powerful intelligence for long-running agents and coding - `CLAUDE_SONNET_4_6("claude-sonnet-4-6")` Best combination of speed and intelligence - `CLAUDE_HAIKU_4_5("claude-haiku-4-5")` - `CLAUDE_HAIKU_4_5_20251001("claude-haiku-4-5-20251001")` - `CLAUDE_OPUS_4_5("claude-opus-4-5")` Powerful intelligence for long-running agents and coding - `CLAUDE_OPUS_4_5_20251101("claude-opus-4-5-20251101")` Powerful intelligence for long-running agents and coding - `CLAUDE_SONNET_4_5("claude-sonnet-4-5")` **Deprecated**: Will reach end-of-life on November 30, 2026. Please migrate to claude-sonnet-5-5. Visit https://docs.anthropic.com/en/docs/resources/model-deprecations for more information. High-performance model for agents and coding - `CLAUDE_SONNET_4_5_20250929("claude-sonnet-4-5-20250929")` **Deprecated**: Will reach end-of-life on November 30, 2026. Please migrate to claude-sonnet-5-5. Visit https://docs.anthropic.com/en/docs/resources/model-deprecations for more information. High-performance model for agents and coding - `Optional effort` How hard Claude works on each inference call. One of `low`, `medium`, `high`, `xhigh`, `max`. Always present; resolved to the per-model default at save time when not supplied. - `class BetaManagedAgentsEffortLow` Low effort. Favors latency over reasoning depth. - `Type type` - `class BetaManagedAgentsEffortMedium` Medium effort. Balances latency and reasoning depth. - `Type type` - `class BetaManagedAgentsEffortHigh` High effort. Favors reasoning depth. - `Type type` - `class BetaManagedAgentsEffortXhigh` Extra-high effort. Not all models accept this level. - `Type type` - `class BetaManagedAgentsEffortMax` Maximum effort. Favors reasoning depth over latency. - `Type type` - `Optional inferenceGeo` Geographic region for model inference. When unset, requests fall through to the workspace's default_inference_geo. - `Optional speed` Inference speed mode. `fast` provides significantly faster output token generation at premium pricing. Defaults to `standard`. Not all models support `fast`; invalid combinations are rejected at create time. - `STANDARD("standard")` - `FAST("fast")` - `Optional multiagent` Resolved multiagent orchestration configuration. Null when the agent is single-threaded. - `class BetaManagedAgentsSessionMultiagentCoordinator` Resolved coordinator topology with full agent definitions for each roster member. - `Type type` - `List agents` Full `agent` definitions the coordinator may spawn as session threads. - `class BetaManagedAgentsSessionThreadAgent` Resolved `agent` definition for a single `session_thread`. Snapshot of the agent at thread creation time. The multiagent roster is not repeated here; read it from `Session.agent`. - `Type type` - `String id` - `Optional description` - `BetaManagedAgentsExecutionIdentity executionIdentity` Execution principal snapshotted from the agent at session creation. Always present; `{"type": "service_account"}` when runs carry no customer-named principal. - `List mcpServers` - `Type type` - `String name` - `String url` - `BetaManagedAgentsModelConfig model` Model identifier and configuration. - `String name` - `List skills` - `class BetaManagedAgentsAnthropicSkill` A resolved Anthropic-managed skill. - `Type type` - `String skillId` - `String version` - `class BetaManagedAgentsCustomSkill` A resolved user-created custom skill. - `Type type` - `String skillId` - `String version` - `Optional system` - `List tools` - `class BetaManagedAgentsAgentToolset20260401` - `Type type` - `List configs` - `class BetaManagedAgentsBashToolConfig` Configuration for the bash tool. - `JsonValue type = "bash"` - `boolean enabled` - `JsonValue name = "bash"` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy` Tool calls are automatically approved without user confirmation. - `Type type` - `class BetaManagedAgentsAlwaysAskPolicy` Tool calls require user confirmation before execution. - `Type type` - `class BetaManagedAgentsAutoPolicy` The server decides each tool call individually: it judges, from the tool, its input, and the session content so far, whether the call is safe to execute or high-risk, and evaluates it to allow when judged safe and to deny when judged high-risk. A call the server cannot reach a judgement on evaluates to ask. - `JsonValue type = "auto"` - `class BetaManagedAgentsEditToolConfig` Configuration for the edit tool. - `JsonValue type = "edit"` - `boolean enabled` - `JsonValue name = "edit"` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy` Tool calls require user confirmation before execution. - `class BetaManagedAgentsAutoPolicy` The server decides each tool call individually: it judges, from the tool, its input, and the session content so far, whether the call is safe to execute or high-risk, and evaluates it to allow when judged safe and to deny when judged high-risk. A call the server cannot reach a judgement on evaluates to ask. - `class BetaManagedAgentsReadToolConfig` Configuration for the read tool. - `JsonValue type = "read"` - `boolean enabled` - `JsonValue name = "read"` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy` Tool calls require user confirmation before execution. - `class BetaManagedAgentsAutoPolicy` The server decides each tool call individually: it judges, from the tool, its input, and the session content so far, whether the call is safe to execute or high-risk, and evaluates it to allow when judged safe and to deny when judged high-risk. A call the server cannot reach a judgement on evaluates to ask. - `class BetaManagedAgentsWriteToolConfig` Configuration for the write tool. - `JsonValue type = "write"` - `boolean enabled` - `JsonValue name = "write"` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy` Tool calls require user confirmation before execution. - `class BetaManagedAgentsAutoPolicy` The server decides each tool call individually: it judges, from the tool, its input, and the session content so far, whether the call is safe to execute or high-risk, and evaluates it to allow when judged safe and to deny when judged high-risk. A call the server cannot reach a judgement on evaluates to ask. - `class BetaManagedAgentsGlobToolConfig` Configuration for the glob tool. - `JsonValue type = "glob"` - `boolean enabled` - `JsonValue name = "glob"` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy` Tool calls require user confirmation before execution. - `class BetaManagedAgentsAutoPolicy` The server decides each tool call individually: it judges, from the tool, its input, and the session content so far, whether the call is safe to execute or high-risk, and evaluates it to allow when judged safe and to deny when judged high-risk. A call the server cannot reach a judgement on evaluates to ask. - `class BetaManagedAgentsGrepToolConfig` Configuration for the grep tool. - `JsonValue type = "grep"` - `boolean enabled` - `JsonValue name = "grep"` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy` Tool calls require user confirmation before execution. - `class BetaManagedAgentsAutoPolicy` The server decides each tool call individually: it judges, from the tool, its input, and the session content so far, whether the call is safe to execute or high-risk, and evaluates it to allow when judged safe and to deny when judged high-risk. A call the server cannot reach a judgement on evaluates to ask. - `class BetaManagedAgentsWebFetchToolConfig` Configuration for the web_fetch tool. - `JsonValue type = "web_fetch"` - `boolean enabled` - `JsonValue name = "web_fetch"` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy` Tool calls require user confirmation before execution. - `class BetaManagedAgentsAutoPolicy` The server decides each tool call individually: it judges, from the tool, its input, and the session content so far, whether the call is safe to execute or high-risk, and evaluates it to allow when judged safe and to deny when judged high-risk. A call the server cannot reach a judgement on evaluates to ask. - `Optional urlSources` Which sources contribute URLs the tool may fetch, always in the object form. Null when not set, which allows every source. - `Optional clientToolResults` Which custom tools' results contribute URLs that may be fetched. Null when not set, which allows every custom tool's results. - `class BetaManagedAgentsWebFetchUrlSourceAll` Every URL from this source may be fetched. This is the default. - `JsonValue type = "all"` - `class BetaManagedAgentsWebFetchUrlSourceNone` This source contributes no URLs that may be fetched. - `JsonValue type = "none"` - `class BetaManagedAgentsWebFetchUrlSourceOnly` Only the named tools' results contribute URLs that may be fetched. - `JsonValue type = "only"` - `List tools` The tools whose results contribute. Between 1 and 128 entries, each with a different name. An empty list is rejected; use "none" to allow no tool's results. - `JsonValue type = "tool_reference"` Must be "tool_reference". - `String name` Name of the tool. Compared exactly, so upper and lower case letters are different. minLength: 1, maxLength: 128 - `class BetaManagedAgentsWebFetchUrlSourceExcept` Every tool's results contribute URLs that may be fetched, except the named tools' results. - `JsonValue type = "except"` - `List tools` The tools whose results do not contribute. Between 1 and 128 entries, each with a different name. An empty list is rejected; use "all" to leave out no tool's results. - `JsonValue type = "tool_reference"` Must be "tool_reference". - `String name` Name of the tool. Compared exactly, so upper and lower case letters are different. minLength: 1, maxLength: 128 - `Optional serverToolResults` Which of the web_search and web_fetch tools' results contribute URLs that may be fetched. Null when not set, which allows both. - `Optional userInput` Whether URLs in the text of user messages may be fetched. Null when not set, which allows them. - `class BetaManagedAgentsWebFetchUrlSourceAll` Every URL from this source may be fetched. This is the default. - `class BetaManagedAgentsWebFetchUrlSourceNone` This source contributes no URLs that may be fetched. - `Optional> allowedDomains` - `Optional> blockedDomains` - `Optional maxContentTokens` format: int32 - `class BetaManagedAgentsWebSearchToolConfig` Configuration for the web_search tool. - `JsonValue type = "web_search"` - `boolean enabled` - `JsonValue name = "web_search"` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy` Tool calls require user confirmation before execution. - `class BetaManagedAgentsAutoPolicy` The server decides each tool call individually: it judges, from the tool, its input, and the session content so far, whether the call is safe to execute or high-risk, and evaluates it to allow when judged safe and to deny when judged high-risk. A call the server cannot reach a judgement on evaluates to ask. - `Optional> allowedDomains` - `Optional> blockedDomains` - `Optional userLocation` Approximate user location for search result localization. - `JsonValue type = "approximate"` Location precision. Only "approximate" is supported. - `Optional city` City name. minLength: 1, maxLength: 255 - `Optional country` Two-letter ISO 3166-1 country code, uppercase. - `Optional region` Region or state name. minLength: 1, maxLength: 255 - `Optional timezone` IANA timezone identifier, e.g. "America/Los_Angeles". minLength: 1, maxLength: 255 - `BetaManagedAgentsAgentToolsetDefaultConfig defaultConfig` Resolved default configuration for agent tools. - `boolean enabled` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy` Tool calls require user confirmation before execution. - `class BetaManagedAgentsAutoPolicy` The server decides each tool call individually: it judges, from the tool, its input, and the session content so far, whether the call is safe to execute or high-risk, and evaluates it to allow when judged safe and to deny when judged high-risk. A call the server cannot reach a judgement on evaluates to ask. - `class BetaManagedAgentsMcpToolset` - `Type type` - `List configs` - `boolean enabled` - `String name` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy` Tool calls require user confirmation before execution. - `class BetaManagedAgentsAutoPolicy` The server decides each tool call individually: it judges, from the tool, its input, and the session content so far, whether the call is safe to execute or high-risk, and evaluates it to allow when judged safe and to deny when judged high-risk. A call the server cannot reach a judgement on evaluates to ask. - `BetaManagedAgentsMcpToolsetDefaultConfig defaultConfig` Resolved default configuration for all tools from an MCP server. - `boolean enabled` - `PermissionPolicy permissionPolicy` Permission policy for tool execution. - `class BetaManagedAgentsAlwaysAllowPolicy` Tool calls are automatically approved without user confirmation. - `class BetaManagedAgentsAlwaysAskPolicy` Tool calls require user confirmation before execution. - `class BetaManagedAgentsAutoPolicy` The server decides each tool call individually: it judges, from the tool, its input, and the session content so far, whether the call is safe to execute or high-risk, and evaluates it to allow when judged safe and to deny when judged high-risk. A call the server cannot reach a judgement on evaluates to ask. - `String mcpServerName` - `class BetaManagedAgentsCustomTool` A custom tool as returned in API responses. - `Type type` - `String description` - `BetaManagedAgentsCustomToolInputSchema inputSchema` JSON Schema for custom tool input parameters. - `JsonValue type = "object"` - `Optional properties` - `Optional> required` - `String name` - `long version` format: int32 - `class BetaManagedAgentsAdvisor` Platform advisor roster entry: a model the session's primary thread may consult mid-turn. - `Type type` - `String model` The advisor model id. - `class BetaManagedAgentsSessionMultiagent20261001` Resolved multiagent configuration with three members, as copied to the `session` at creation. - `JsonValue type = "multiagent_20261001"` - `BetaManagedAgentsMultiagentAdvisor advisor` Whether the session's primary thread can consult an advisor model. - `class BetaManagedAgentsMultiagentAdvisorEnabled` The session's primary thread can consult `model` mid-turn. - `JsonValue type = "enabled"` - `String model` The advisor model id. - `class BetaManagedAgentsMultiagentAdvisorDisabled` The agent has no advisor. - `JsonValue type = "disabled"` - `BetaManagedAgentsSessionMultiagentSubagents subagents` Whether the agent can spawn session threads. - `class BetaManagedAgentsSessionMultiagentSubagentsEnabled` The agent can spawn session threads. - `JsonValue type = "enabled"` - `BetaManagedAgentsMultiagentInlineAgents inlineAgents` Whether the agent can define inline agents, which are not saved, when it spawns session threads. - `class BetaManagedAgentsMultiagentInlineAgentsEnabled` The agent can define inline agents. - `JsonValue type = "enabled"` - `class BetaManagedAgentsMultiagentInlineAgentsDisabled` The agent cannot define inline agents. - `JsonValue type = "disabled"` - `List predefinedAgents` Full `agent` definitions of the predefined agents, which are saved agents that this agent can spawn as session threads. - `Type type` - `String id` - `Optional description` - `BetaManagedAgentsExecutionIdentity executionIdentity` Execution principal snapshotted from the agent at session creation. Always present; `{"type": "service_account"}` when runs carry no customer-named principal. - `List mcpServers` - `BetaManagedAgentsModelConfig model` Model identifier and configuration. - `String name` - `List skills` - `Optional system` - `List tools` - `long version` format: int32 - `class BetaManagedAgentsMultiagentSubagentsDisabled` The agent cannot spawn session threads. - `JsonValue type = "disabled"` - `BetaManagedAgentsSessionMultiagentWorkflows workflows` Whether the agent can start workflow runs. - `class BetaManagedAgentsSessionMultiagentWorkflowsEnabled` The agent can start workflow runs. - `JsonValue type = "enabled"` - `BetaManagedAgentsMultiagentInlineAgents inlineAgents` Whether a run's plan can define inline agents, which are not saved. - `List predefinedAgents` Full `agent` definitions of the predefined agents, which are saved agents that a run's plan can use. - `Type type` - `String id` - `Optional description` - `BetaManagedAgentsExecutionIdentity executionIdentity` Execution principal snapshotted from the agent at session creation. Always present; `{"type": "service_account"}` when runs carry no customer-named principal. - `List mcpServers` - `BetaManagedAgentsModelConfig model` Model identifier and configuration. - `String name` - `List skills` - `Optional system` - `List tools` - `long version` format: int32 - `class BetaManagedAgentsMultiagentWorkflowsDisabled` The agent cannot start workflow runs. - `JsonValue type = "disabled"` - `String name` - `List skills` - `class BetaManagedAgentsAnthropicSkill` A resolved Anthropic-managed skill. - `class BetaManagedAgentsCustomSkill` A resolved user-created custom skill. - `Optional system` - `List tools` - `class BetaManagedAgentsAgentToolset20260401` - `class BetaManagedAgentsMcpToolset` - `class BetaManagedAgentsCustomTool` A custom tool as returned in API responses. - `long version` format: int32 - `Optional budget` The session's budget after the update: the new budget when set or replaced, or null when the update removed it. Present only when the update changed the budget. - `Type type` - `BetaMonetaryAmount maxListCost` Maximum list cost the session may accrue. List price is used regardless of any negotiated discount, so the cap fires at or before the actual charge. - `String amount` Amount in minor units of the currency, as an integer decimal string with no leading zeros: "2500" is $25.00 and "50" is fifty cents. A string rather than a number so no float rounding is ever applied. - `BetaCurrency currency` Uppercase ISO-4217 currency code. `USD` is the only currency currently supported; the accepted set is closed and grows only when a new currency is priced. - `Optional metadata` The session's full metadata bag after the update. Present when the update set non-empty metadata; absent when metadata was unchanged or cleared to empty. - `Optional title` The session's new title. Present only when the update changed it. - `class BetaManagedAgentsStartEvent` Opens a preview of a buffered event. Carries the previewed event's type and id only. Followed by zero or more event_delta events with the same event id, normally concluded by the buffered event carrying that id. If the producing model request ends without that event (an error or interrupt mid-stream), its terminal span.model_request_end closes the preview. Only sent on stream connections that opt in via event_deltas; never appears in event history. - `Type type` - `BetaManagedAgentsStartEventPreview event` The previewed event's type and id. The event type determines which delta types the preview's event_delta events carry: agent.message events stream content_delta fragments; agent.thinking previews are start-only — no deltas follow, and the buffered agent.thinking with the same id concludes them. - `class BetaManagedAgentsAgentMessagePreview` - `Type type` - `String id` The id the buffered agent.message will carry if it is emitted. Matches the event_id on this preview's event_delta events. - `class BetaManagedAgentsAgentThinkingPreview` - `Type type` - `String id` The id the buffered agent.thinking will carry if it is emitted. Start-only — no event_delta events follow. - `class BetaManagedAgentsDeltaEvent` An incremental update to an event that is still being streamed. Deltas are best-effort and may stop early; when the buffered event with id == event_id is produced it carries the complete content. A model request that ends early (an error or interrupt) produces no buffered event — its terminal span.model_request_end closes the preview. Only sent on stream connections that opt in via event_deltas; never appears in event history. - `Type type` - `BetaManagedAgentsDeltaContent delta` One fragment of the previewed event. The delta type is named for the previewed event's field it streams into: agent.message events stream content_delta fragments, each a partial element of the content array. - `Type type` - `BetaManagedAgentsTextBlock content` A partial element of the content array at index, typed like the element itself — the same shape the buffered agent.message carries in content. - `Optional index` Which entry in the previewed event's content array this fragment lands in. Insert content as that entry when the index is new; append to the existing entry otherwise. - `String eventId` The id of the event being previewed. Matches event.id on the corresponding event_start and the buffered event that reconciles the preview. - `class BetaManagedAgentsSystemMessageEvent` A mid-conversation system message event. Carries system-role content that is appended to the session as a `role: "system"` turn. - `Type type` - `String id` Unique identifier for this event. - `List content` System content blocks. Text-only. - `Type type` - `String text` The text content. minLength: 1 - `Optional processedAt` Timestamp when this system message was processed. format: date-time - `class BetaManagedAgentsSessionUsageEvent` Periodic snapshot of the session's cumulative usage and tracked list cost. - `Type type` - `String id` Unique identifier for this event. - `LocalDateTime processedAt` Timestamp when the snapshot was taken. format: date-time - `BetaManagedAgentsSessionUsageSnapshot usage` The session's cumulative usage at the snapshot time. - `Optional activeSeconds` Cumulative time in seconds during which the session had at least one thread in running status. Overlapping activity from concurrent threads is counted once. This is the duration the session's runtime cost is priced on. format: double - `Optional cacheCreation` Tokens used to create prompt cache entries, broken down by cache TTL. - `Optional ephemeral1hInputTokens` Tokens used to create 1-hour ephemeral cache entries. format: int32 - `Optional ephemeral5mInputTokens` Tokens used to create 5-minute ephemeral cache entries. format: int32 - `Optional cacheReadInputTokens` Total tokens read from prompt cache. format: int32 - `Optional inputTokens` Total input tokens consumed across all turns. format: int32 - `Optional listCost` Cumulative list cost of the session across all turns, priced at public list rates. - `Optional outputTokens` Total output tokens generated across all turns. format: int32 - `Optional serverToolUse` Cumulative server-executed tool usage across all turns. - `Optional webFetchRequests` Number of server-executed web fetch requests. format: int32 - `Optional webSearchRequests` Number of server-executed web search requests. format: int32 - `Optional budget` The session's configured budget at the snapshot time, or null when the session has no budget. - `class BetaManagedAgentsWorkflowRunCreatedEvent` A workflow run was created. A workflow run is background work that the session's agent starts. Emitted once per run, before the run's other `workflow_run.*` events. - `JsonValue type = "workflow_run.created"` - `String id` Unique identifier for this event. - `Optional description` Description that the agent gave the run, passed on as written, or `null` if it gave none. - `String name` Name that the agent gave the run, passed on as written, or a name that the server assigned. - `List phases` The phases that the run's plan declares, in the plan's order. Can be empty. - `String id` Unique identifier for the phase. - `Optional description` Description that the agent gave the phase, passed on as written, or `null` if it gave none. - `String name` Name that the agent gave the phase, passed on as written. - `LocalDateTime processedAt` Timestamp when this event was processed. format: date-time - `String workflowRunId` Identifier of the run. The same value is on all of the run's `workflow_run.*` events. - `class BetaManagedAgentsWorkflowRunStatusEndedEvent` A workflow run ended. Emitted once per run, as the last of the run's `workflow_run.*` events. - `JsonValue type = "workflow_run.status_ended"` - `String id` Unique identifier for this event. - `LocalDateTime processedAt` Timestamp when this event was processed. format: date-time - `BetaManagedAgentsWorkflowRunResult result` How the run ended. - `class BetaManagedAgentsWorkflowRunResultCompleted` The run's plan, a program that the agent wrote, finished. This does not say whether the work succeeded. - `JsonValue type = "completed"` - `class BetaManagedAgentsWorkflowRunResultError` The run failed or reached its time limit. - `JsonValue type = "error"` - `BetaManagedAgentsWorkflowRunError error` Why the run did not finish. - `class BetaManagedAgentsTimeoutWorkflowRunError` The run reached its time limit. - `JsonValue type = "timeout_error"` - `String message` Short explanation written by the server. It never contains content from the run or its agents. - `class BetaManagedAgentsProgramWorkflowRunError` The plan, a program that the agent wrote, failed, or the server refused it. - `JsonValue type = "program_error"` - `String message` Short explanation written by the server. It never contains content from the run or its agents. - `class BetaManagedAgentsUnknownWorkflowRunError` A failure that has no type of its own. - `JsonValue type = "unknown_error"` - `String message` Short explanation written by the server. It never contains content from the run or its agents. - `class BetaManagedAgentsThreadLimitWorkflowRunError` The run exceeded the limit on the number of threads that a run can create. - `JsonValue type = "thread_limit_error"` - `String message` Short explanation written by the server. It never contains content from the run or its agents. - `class BetaManagedAgentsMaxWorkflowRunsWorkflowRunError` No run was created, because the session was at its limit of open workflow runs, which are runs that have not ended. Only `workflow_run.error` carries this type. - `JsonValue type = "max_workflow_runs_error"` - `String message` Short explanation written by the server. It never contains content from the run or its agents. - `class BetaManagedAgentsWorkflowRunResultStopped` The agent stopped the run. - `JsonValue type = "stopped"` - `String workflowRunId` Identifier of the run. The same value is on all of the run's `workflow_run.*` events. - `class BetaManagedAgentsWorkflowRunPhaseStartedEvent` A workflow run's plan entered a phase. - `JsonValue type = "workflow_run.phase_started"` - `String id` Unique identifier for this event. - `LocalDateTime processedAt` Timestamp when this event was processed. format: date-time - `String workflowRunId` Identifier of the run. The same value is on all of the run's `workflow_run.*` events. - `String workflowRunPhaseId` Identifier of the phase, as in `phases` on the run's `workflow_run.created` event. - `class BetaManagedAgentsWorkflowRunPhaseEndedEvent` A workflow run's plan left a phase, or the run's end closed it. Emitted once for every `workflow_run.phase_started` event, before the run's `workflow_run.status_ended` event. The event does not say whether the plan finished the phase's work, or why it left. - `JsonValue type = "workflow_run.phase_ended"` - `String id` Unique identifier for this event. - `String phaseStartedId` Identifier of the `workflow_run.phase_started` event that opened the phase. - `LocalDateTime processedAt` Timestamp when this event was processed. format: date-time - `String workflowRunId` Identifier of the run. The same value is on all of the run's `workflow_run.*` events. - `String workflowRunPhaseId` Identifier of the phase, as in `phases` on the run's `workflow_run.created` event. - `class BetaManagedAgentsWorkflowRunStatusRunningEvent` A workflow run is running. Emitted when the run starts to execute, and each time it resumes after being idle. A run that starts idle emits `workflow_run.status_idle` first. - `JsonValue type = "workflow_run.status_running"` - `String id` Unique identifier for this event. - `LocalDateTime processedAt` Timestamp when this event was processed. format: date-time - `String workflowRunId` Identifier of the run. The same value is on all of the run's `workflow_run.*` events. - `class BetaManagedAgentsWorkflowRunStatusIdleEvent` A workflow run is idle. Emitted each time the run goes idle, whatever the cause. If the run ends while idle, no `workflow_run.status_running` comes between this event and its `workflow_run.status_ended`. - `JsonValue type = "workflow_run.status_idle"` - `String id` Unique identifier for this event. - `LocalDateTime processedAt` Timestamp when this event was processed. format: date-time - `String workflowRunId` Identifier of the run. The same value is on all of the run's `workflow_run.*` events. - `class BetaManagedAgentsWorkflowRunErrorEvent` A workflow run met an error, or an error kept a run from being created. A run that ends with a `result.type` of `error` emits this event before its `workflow_run.status_ended`, with the same `error`. - `JsonValue type = "workflow_run.error"` - `String id` Unique identifier for this event. - `BetaManagedAgentsWorkflowRunError error` Why the run did not finish, or was not created. - `LocalDateTime processedAt` Timestamp when this event was processed. format: date-time - `Optional workflowRunId` Identifier of the run that met the error, or `null` when the error kept a run from being created. ## Example ```java package com.anthropic.example; import com.anthropic.client.AnthropicClient; import com.anthropic.client.okhttp.AnthropicOkHttpClient; import com.anthropic.core.http.StreamResponse; import com.anthropic.models.beta.sessions.threads.BetaManagedAgentsStreamSessionThreadEvents; import com.anthropic.models.beta.sessions.threads.events.EventStreamParams; public final class Main { private Main() {} public static void main(String[] args) { AnthropicClient client = AnthropicOkHttpClient.fromEnv(); EventStreamParams params = EventStreamParams.builder() .sessionId("sesn_011CZkZAtmR3yMPDzynEDxu7") .threadId("sthr_011CZkZVWa6oJjw1rgXZpnBt") .build(); StreamResponse betaManagedAgentsStreamSessionThreadEvents = client.beta().sessions().threads().events().streamStreaming(params); } } ``` ### Response (200) ```json { "id": "sevt_011CZkZGPp1iBcp4kaQSihUm", "content": [ { "text": "Where is my order #1234?", "type": "text" } ], "type": "user.message", "processed_at": "2026-03-15T10:00:00Z" } ```