--- title: Update Session url: https://platform.claude.com/docs/en/api/java/beta/sessions/update --- # Update Session `BetaManagedAgentsSession beta().sessions().update(params = SessionUpdateParams.none(), requestOptions = RequestOptions.none())` **POST** `/v1/sessions/{session_id}` Update Session ## Parameters - `SessionUpdateParams params` - `Optional sessionId` (path parameter) - `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. - `Optional agent` Agent configuration update. Only `tools` and `mcp_servers` are updatable mid-session. Only valid for sessions created from an agent or deployment reference. The session must not be running. - `Optional budget` Enforced spend ceiling for the session. Set an object to replace the budget of a session that was created with one, or `null` to remove it; omit to preserve. A budget cannot be added to a session created without one (rejected with reason `budget_create_only`), and a removed budget cannot be re-added. Allowed in any non-terminated status. Lowering `max_list_cost` to at or below the session's consumed list cost is rejected with reason `budget_not_raised`, and every model the session can run must have a public list price or the request is rejected with reason `model_not_budgetable`. - `Optional metadata` Metadata patch. Set a key to a string to upsert it, or to null to delete it. Omit the field to preserve. - `Optional title` Human-readable session title. minLength: 1, maxLength: 500 - `Optional> vaultIds` Vault IDs (`vlt_*`) to attach to the session. Not yet supported; requests setting this field are rejected. Reserved for future use. ## Returns - `class BetaManagedAgentsSession` A Managed Agents `session`. - `Type type` - `String id` - `BetaManagedAgentsSessionAgent agent` Resolved `agent` definition for a `session`. Snapshot of the `agent` at `session` creation time. - `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 archivedAt` When the session was archived. Null if not archived. format: date-time - `Optional budget` The session's enforced spend ceiling, or null when no budget is set. - `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. - `LocalDateTime createdAt` A timestamp in RFC 3339 format format: date-time - `String environmentId` - `Metadata metadata` - `List outcomeEvaluations` Per-outcome evaluation state. One entry per `define_outcome` event sent to the session. - `Type type` - `Optional completedAt` When the outcome reached a terminal result. Null while `pending`/`running`/`evaluating`. format: date-time - `String description` What the agent should produce. - `Optional explanation` Grader's verdict text from the most recent evaluation. For `satisfied`, explains why criteria are met; for `needs_revision` (intermediate), what's missing; for `failed`, why unrecoverable. - `long iteration` 0-indexed revision cycle the outcome is currently on. format: int32 - `String outcomeId` Server-generated outc_ ID for this outcome. - `String result` Current evaluation state. `pending` before the agent begins work; `running` while producing or revising; `evaluating` while the grader scores; `satisfied`/`max_iterations_reached`/`failed`/`interrupted` are terminal. - `List resources` - `class BetaManagedAgentsGitHubRepositoryResource` - `Type type` - `String id` - `LocalDateTime createdAt` A timestamp in RFC 3339 format format: date-time - `String mountPath` - `LocalDateTime updatedAt` A timestamp in RFC 3339 format format: date-time - `String url` - `Optional checkout` - `class BetaManagedAgentsBranchCheckout` - `Type type` - `String name` Branch name to check out. minLength: 1, maxLength: 255 - `class BetaManagedAgentsCommitCheckout` - `Type type` - `String sha` Full commit SHA to check out. minLength: 7, maxLength: 64 - `class BetaManagedAgentsFileResource` - `Type type` - `String id` - `LocalDateTime createdAt` A timestamp in RFC 3339 format format: date-time - `String fileId` - `String mountPath` - `LocalDateTime updatedAt` A timestamp in RFC 3339 format format: date-time - `class BetaManagedAgentsMemoryStoreResource` A memory store attached to an agent session. - `Type type` - `String memoryStoreId` The memory store ID (memstore_...). Must belong to the caller's organization and workspace. - `Optional access` Access mode for the mounted store. Defaults to `read_write`. `read_only` mounts the store as a read-only filesystem. - `READ_WRITE("read_write")` - `READ_ONLY("read_only")` - `Optional description` Description of the memory store, snapshotted at attach time. Rendered into the agent's system prompt. Empty string when the store has no description. - `Optional instructions` Per-attachment guidance for the agent on how to use this store. Rendered into the memory section of the system prompt. Max 4096 chars. maxLength: 4096 - `Optional mountPath` Filesystem path where the store is mounted in the session container, e.g. /mnt/memory/user-preferences. Derived from the store's name. Output-only. - `Optional name` Display name of the memory store, snapshotted at attach time. Later edits to the store's name do not propagate to this resource. - `BetaManagedAgentsSessionStats stats` Timing statistics for the session. - `Optional activeSeconds` Cumulative time in seconds the session spent in `running` status. Excludes idle time. format: double - `Optional durationSeconds` Elapsed time since session creation in seconds. For terminated sessions, frozen at the final update. format: double - `Status status` - `RESCHEDULING("rescheduling")` Transient error occurred, retrying automatically. - `RUNNING("running")` Agent is actively executing. - `IDLE("idle")` Agent is waiting for input, including user messages or tool confirmations. Sessions start in idle. - `TERMINATED("terminated")` Session has ended, either due to an error or completion. - `Optional title` - `LocalDateTime updatedAt` A timestamp in RFC 3339 format format: date-time - `BetaManagedAgentsSessionUsage usage` Cumulative token usage for the session. - `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, unlike `stats.active_seconds`, which sums each thread's own active time. 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. Absent until cost tracking is available for the session. - `Optional outputTokens` Total output tokens generated across all turns. format: int32 - `Optional serverToolUse` Cumulative server-executed tool usage across all turns. Absent until server-tool tracking is available for the session. - `Optional webFetchRequests` Number of server-executed web fetch requests. format: int32 - `Optional webSearchRequests` Number of server-executed web search requests. format: int32 - `List vaultIds` Vault IDs attached to the session at creation. Empty when no vaults were supplied. - `Optional deploymentId` Deployment ID when the session was created from a deployment reference. Null otherwise. ## Example ```java package com.anthropic.example; import com.anthropic.client.AnthropicClient; import com.anthropic.client.okhttp.AnthropicOkHttpClient; import com.anthropic.models.beta.sessions.BetaManagedAgentsSession; import com.anthropic.models.beta.sessions.SessionUpdateParams; public final class Main { private Main() {} public static void main(String[] args) { AnthropicClient client = AnthropicOkHttpClient.fromEnv(); BetaManagedAgentsSession betaManagedAgentsSession = client.beta().sessions().update("sesn_011CZkZAtmR3yMPDzynEDxu7"); } } ``` ### Response (200) ```json { "id": "sesn_011CZkZAtmR3yMPDzynEDxu7", "agent": { "id": "agent_011CZkYpogX7uDKUyvBTophP", "description": "A general-purpose starter agent.", "execution_identity": { "type": "service_account" }, "mcp_servers": [ { "name": "example-mcp", "type": "url", "url": "https://example-server.modelcontextprotocol.io/sse" } ], "model": { "id": "claude-opus-5-5", "effort": { "type": "low" }, "inference_geo": "inference_geo", "speed": "standard" }, "multiagent": { "agents": [ { "id": "agent_011CZkYqphY8vELVzwCUpqiQ", "description": "A focused research subagent.", "execution_identity": { "type": "service_account" }, "mcp_servers": [ { "name": "example-mcp", "type": "url", "url": "https://example-server.modelcontextprotocol.io/sse" } ], "model": { "id": "claude-opus-5-5", "effort": { "type": "low" }, "inference_geo": "inference_geo", "speed": "standard" }, "name": "Researcher", "skills": [ { "skill_id": "xlsx", "type": "anthropic", "version": "1" } ], "system": "You are a research subagent that gathers and summarises sources for the coordinating agent.", "tools": [ { "configs": [ { "enabled": true, "name": "bash", "permission_policy": { "type": "always_allow" }, "type": "bash" } ], "default_config": { "enabled": true, "permission_policy": { "type": "always_ask" } }, "type": "agent_toolset_20260401" } ], "type": "agent", "version": 1 } ], "type": "coordinator" }, "name": "My First Agent", "skills": [ { "skill_id": "xlsx", "type": "anthropic", "version": "1" }, { "skill_id": "skill_011CZkZFNu9hAbo3jZPRgTmx", "type": "custom", "version": "2" } ], "system": "You are a general-purpose agent that can research, write code, run commands, and use connected tools to complete the user's task end to end.", "tools": [ { "configs": [ { "enabled": true, "name": "bash", "permission_policy": { "type": "always_allow" }, "type": "bash" } ], "default_config": { "enabled": true, "permission_policy": { "type": "always_ask" } }, "type": "agent_toolset_20260401" } ], "type": "agent", "version": 1 }, "archived_at": null, "budget": { "max_list_cost": { "amount": "2500", "currency": "USD" }, "type": "limit" }, "created_at": "2026-03-15T10:00:00Z", "environment_id": "env_011CZkZ9X2dpNyB7HsEFoRfW", "metadata": {}, "outcome_evaluations": [ { "completed_at": "2026-03-15T10:02:31Z", "description": "Produce a 2-page summary as summary.md", "explanation": "All five sections present with inline citations.", "iteration": 0, "outcome_id": "outc_011CZkZRSw2kEfs6ncTVmjxP", "result": "satisfied", "type": "outcome_evaluation" } ], "resources": [ { "id": "sesrsc_011CZkZBJq5dWxk9fVLNcPht", "created_at": "2026-03-15T10:00:00Z", "file_id": "file_011CNha8iCJcU1wXNR6q4V8w", "mount_path": "/uploads/receipt.pdf", "type": "file", "updated_at": "2026-03-15T10:00:00Z" }, { "id": "sesrsc_011CZkZCKr6eXym1gWMPdQiu", "created_at": "2026-03-15T10:00:00Z", "mount_path": "/workspace/example-repo", "type": "github_repository", "updated_at": "2026-03-15T10:00:00Z", "url": "https://github.com/example-org/example-repo", "checkout": { "name": "main", "type": "branch" } } ], "stats": { "active_seconds": 0, "duration_seconds": 0 }, "status": "idle", "title": "Order #1234 inquiry", "type": "session", "updated_at": "2026-03-15T10:00:00Z", "usage": { "active_seconds": 0, "cache_creation": { "ephemeral_1h_input_tokens": 0, "ephemeral_5m_input_tokens": 0 }, "cache_read_input_tokens": 0, "input_tokens": 0, "list_cost": { "amount": "2500", "currency": "USD" }, "output_tokens": 0, "server_tool_use": { "web_fetch_requests": 0, "web_search_requests": 3 } }, "vault_ids": [ "vlt_011CZkZDLs7fYzm1hXNPeRjv" ], "deployment_id": "deployment_id" } ```