--- title: Create Agent url: https://platform.claude.com/docs/en/api/go/beta/agents/create --- # Create Agent `client.Beta.Agents.New(ctx, params) (*BetaManagedAgentsAgent, error)` **POST** `/v1/agents` Create Agent ## Parameters - `params BetaAgentNewParams` - `Model BetaManagedAgentsModelConfigParams` Model identifier. Accepts the [model string](https://platform.claude.com/docs/en/about-claude/models/overview?sdk_languages=go#latest-models-comparison), e.g. `claude-opus-5-5`, or a `model_config` object for additional configuration control - `type BetaManagedAgentsModelConfigParams` An object that defines additional configuration control over model use - `ID BetaManagedAgentsModel` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `const BetaManagedAgentsModelClaudeHaiku5_5 BetaManagedAgentsModel = "claude-haiku-5-5"` Fastest model for high-volume, real-time tasks - `const BetaManagedAgentsModelClaudeSonnet5_5 BetaManagedAgentsModel = "claude-sonnet-5-5"` Efficient model for coding and agents - `const BetaManagedAgentsModelClaudeOpus5_5 BetaManagedAgentsModel = "claude-opus-5-5"` Powerful intelligence for coding, knowledge work, and long-running agents - `const BetaManagedAgentsModelClaudeFable5_1 BetaManagedAgentsModel = "claude-fable-5-1"` Frontier intelligence for ambitious tasks across coding, scientific discovery, and enterprise workflows - `const BetaManagedAgentsModelClaudeSonnet5 BetaManagedAgentsModel = "claude-sonnet-5"` Efficient model for coding and agents - `const BetaManagedAgentsModelClaudeFable5 BetaManagedAgentsModel = "claude-fable-5"` Next generation of intelligence for the hardest knowledge work and coding problems - `const BetaManagedAgentsModelClaudeOpus5 BetaManagedAgentsModel = "claude-opus-5"` Powerful intelligence for long-running agents and coding - `const BetaManagedAgentsModelClaudeOpus4_8 BetaManagedAgentsModel = "claude-opus-4-8"` Powerful intelligence for long-running agents and coding - `const BetaManagedAgentsModelClaudeOpus4_7 BetaManagedAgentsModel = "claude-opus-4-7"` Powerful intelligence for long-running agents and coding - `const BetaManagedAgentsModelClaudeOpus4_6 BetaManagedAgentsModel = "claude-opus-4-6"` Powerful intelligence for long-running agents and coding - `const BetaManagedAgentsModelClaudeSonnet4_6 BetaManagedAgentsModel = "claude-sonnet-4-6"` Best combination of speed and intelligence - `const BetaManagedAgentsModelClaudeHaiku4_5 BetaManagedAgentsModel = "claude-haiku-4-5"` - `const BetaManagedAgentsModelClaudeHaiku4_5_20251001 BetaManagedAgentsModel = "claude-haiku-4-5-20251001"` - `const BetaManagedAgentsModelClaudeOpus4_5 BetaManagedAgentsModel = "claude-opus-4-5"` Powerful intelligence for long-running agents and coding - `const BetaManagedAgentsModelClaudeOpus4_5_20251101 BetaManagedAgentsModel = "claude-opus-4-5-20251101"` Powerful intelligence for long-running agents and coding - `const BetaManagedAgentsModelClaudeSonnet4_5 BetaManagedAgentsModel = "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 - `const BetaManagedAgentsModelClaudeSonnet4_5_20250929 BetaManagedAgentsModel = "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 - `Effort BetaManagedAgentsModelConfigParamsEffortUnion Optional` How hard Claude works on each inference call. Accepts a bare level string (`"high"`) or `{"type": "high"}`. On create, omitting it resolves the per-model default; on update, omitting it leaves the stored value unchanged. - `type BetaManagedAgentsModelConfigParamsEffortBetaManagedAgentsEffortLevel string` How hard Claude works on each turn. Higher levels favor reasoning depth over latency. Not all models accept every level; invalid combinations are rejected at create time. - `const BetaManagedAgentsModelConfigParamsEffortBetaManagedAgentsEffortLevelLow BetaManagedAgentsModelConfigParamsEffortBetaManagedAgentsEffortLevel = "low"` Low effort. Favors latency over reasoning depth. - `const BetaManagedAgentsModelConfigParamsEffortBetaManagedAgentsEffortLevelMedium BetaManagedAgentsModelConfigParamsEffortBetaManagedAgentsEffortLevel = "medium"` Medium effort. Balances latency and reasoning depth. - `const BetaManagedAgentsModelConfigParamsEffortBetaManagedAgentsEffortLevelHigh BetaManagedAgentsModelConfigParamsEffortBetaManagedAgentsEffortLevel = "high"` High effort. Favors reasoning depth. - `const BetaManagedAgentsModelConfigParamsEffortBetaManagedAgentsEffortLevelXhigh BetaManagedAgentsModelConfigParamsEffortBetaManagedAgentsEffortLevel = "xhigh"` Extra-high effort. Not all models accept this level. - `const BetaManagedAgentsModelConfigParamsEffortBetaManagedAgentsEffortLevelMax BetaManagedAgentsModelConfigParamsEffortBetaManagedAgentsEffortLevel = "max"` Maximum effort. Favors reasoning depth over latency. - `type BetaManagedAgentsEffortLow` Low effort. Favors latency over reasoning depth. - `Type BetaManagedAgentsEffortLowType` - `type BetaManagedAgentsEffortMedium` Medium effort. Balances latency and reasoning depth. - `Type BetaManagedAgentsEffortMediumType` - `type BetaManagedAgentsEffortHigh` High effort. Favors reasoning depth. - `Type BetaManagedAgentsEffortHighType` - `type BetaManagedAgentsEffortXhigh` Extra-high effort. Not all models accept this level. - `Type BetaManagedAgentsEffortXhighType` - `type BetaManagedAgentsEffortMax` Maximum effort. Favors reasoning depth over latency. - `Type BetaManagedAgentsEffortMaxType` - `InferenceGeo string Optional` Geographic region for model inference. When unset, requests fall through to the workspace's default_inference_geo. On update, `model` is whole-object replacement — omitting inference_geo clears it. - `Speed BetaManagedAgentsModelConfigParamsSpeed Optional` Inference speed mode. Defaults to `standard`. - `const BetaManagedAgentsModelConfigParamsSpeedStandard BetaManagedAgentsModelConfigParamsSpeed = "standard"` - `const BetaManagedAgentsModelConfigParamsSpeedFast BetaManagedAgentsModelConfigParamsSpeed = "fast"` - `Name string` Human-readable name for the agent. minLength: 1, maxLength: 256 - `Description param.Opt[string] Optional` Description of what the agent does. maxLength: 2048 - `ExecutionIdentity BetaManagedAgentsExecutionIdentityParamsUnion Optional` Execution principal for runs of this agent. Omitting it, sending null, or sending `{"type": "service_account"}` stores the default. - `MCPServers []BetaManagedAgentsURLMCPServerParams Optional` MCP servers this agent connects to. Maximum 20. Names must be unique within the array. Every server must be referenced by an `mcp_toolset` in `tools`; unreferenced servers are rejected. See the [MCP connector guide](https://platform.claude.com/docs/en/managed-agents/mcp-connector?sdk_languages=go). - `Type BetaManagedAgentsURLMCPServerParamsType` - `Name string` Unique name for this server, referenced by mcp_toolset configurations. 1-255 characters. minLength: 1, maxLength: 255 - `URL string` Endpoint URL for the MCP server. maxLength: 2048 - `Metadata map[string, string] Optional` Arbitrary key-value metadata. Maximum 16 pairs, keys up to 64 chars, values up to 512 chars. - `Multiagent BetaManagedAgentsMultiagentParamsUnion Optional` Multiagent orchestration configuration. - `Skills []BetaManagedAgentsSkillParamsUnion Optional` Skills available to the agent. - `type BetaManagedAgentsAnthropicSkillParams` An Anthropic-managed skill. - `Type BetaManagedAgentsAnthropicSkillParamsType` - `SkillID string` Identifier of the Anthropic skill (e.g., "xlsx"). minLength: 1, maxLength: 64 - `Version string Optional` Version to pin. Defaults to latest if omitted. minLength: 1, maxLength: 64 - `type BetaManagedAgentsCustomSkillParams` A user-created custom skill. - `Type BetaManagedAgentsCustomSkillParamsType` - `SkillID string` Tagged ID of the custom skill (e.g., "skill_01XJ5..."). minLength: 1, maxLength: 64 - `Version string Optional` Version to pin. Defaults to latest if omitted. minLength: 1, maxLength: 64 - `System param.Opt[string] Optional` System prompt for the agent. maxLength: 100000 - `Tools []BetaAgentNewParamsToolUnion Optional` Tool configurations available to the agent. Maximum of 256 tools across all toolsets allowed. - `type BetaManagedAgentsAgentToolset20260401Params` Configuration for built-in agent tools. Use this to enable or disable groups of tools available to the agent. - `Type BetaManagedAgentsAgentToolset20260401ParamsType` - `Configs []BetaManagedAgentsAgentToolConfigParamsUnion Optional` Per-tool configuration overrides. - `type BetaManagedAgentsBashToolConfigParams` Configuration override for the bash tool. - `Type BetaManagedAgentsBashToolConfigParamsType Optional` - `Name Bash` Must be "bash". - `Enabled bool Optional` Whether this tool is enabled and available to Claude. Overrides the default_config setting. - `PermissionPolicy BetaManagedAgentsBashToolConfigParamsPermissionPolicyUnion Optional` Permission policy for this tool. Controls whether tool calls are auto-approved or require confirmation. - `type BetaManagedAgentsAlwaysAllowPolicy` Tool calls are automatically approved without user confirmation. - `Type BetaManagedAgentsAlwaysAllowPolicyType` - `type BetaManagedAgentsAlwaysAskPolicy` Tool calls require user confirmation before execution. - `Type BetaManagedAgentsAlwaysAskPolicyType` - `type 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. - `Type Auto` - `type BetaManagedAgentsEditToolConfigParams` Configuration override for the edit tool. - `Type BetaManagedAgentsEditToolConfigParamsType Optional` - `Name Edit` Must be "edit". - `Enabled bool Optional` Whether this tool is enabled and available to Claude. Overrides the default_config setting. - `PermissionPolicy BetaManagedAgentsEditToolConfigParamsPermissionPolicyUnion Optional` Permission policy for this tool. Controls whether tool calls are auto-approved or require confirmation. - `type BetaManagedAgentsAlwaysAllowPolicy` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy` Tool calls require user confirmation before execution. - `type 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. - `type BetaManagedAgentsReadToolConfigParams` Configuration override for the read tool. - `Type BetaManagedAgentsReadToolConfigParamsType Optional` - `Name Read` Must be "read". - `Enabled bool Optional` Whether this tool is enabled and available to Claude. Overrides the default_config setting. - `PermissionPolicy BetaManagedAgentsReadToolConfigParamsPermissionPolicyUnion Optional` Permission policy for this tool. Controls whether tool calls are auto-approved or require confirmation. - `type BetaManagedAgentsAlwaysAllowPolicy` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy` Tool calls require user confirmation before execution. - `type 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. - `type BetaManagedAgentsWriteToolConfigParams` Configuration override for the write tool. - `Type BetaManagedAgentsWriteToolConfigParamsType Optional` - `Name Write` Must be "write". - `Enabled bool Optional` Whether this tool is enabled and available to Claude. Overrides the default_config setting. - `PermissionPolicy BetaManagedAgentsWriteToolConfigParamsPermissionPolicyUnion Optional` Permission policy for this tool. Controls whether tool calls are auto-approved or require confirmation. - `type BetaManagedAgentsAlwaysAllowPolicy` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy` Tool calls require user confirmation before execution. - `type 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. - `type BetaManagedAgentsGlobToolConfigParams` Configuration override for the glob tool. - `Type BetaManagedAgentsGlobToolConfigParamsType Optional` - `Name Glob` Must be "glob". - `Enabled bool Optional` Whether this tool is enabled and available to Claude. Overrides the default_config setting. - `PermissionPolicy BetaManagedAgentsGlobToolConfigParamsPermissionPolicyUnion Optional` Permission policy for this tool. Controls whether tool calls are auto-approved or require confirmation. - `type BetaManagedAgentsAlwaysAllowPolicy` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy` Tool calls require user confirmation before execution. - `type 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. - `type BetaManagedAgentsGrepToolConfigParams` Configuration override for the grep tool. - `Type BetaManagedAgentsGrepToolConfigParamsType Optional` - `Name Grep` Must be "grep". - `Enabled bool Optional` Whether this tool is enabled and available to Claude. Overrides the default_config setting. - `PermissionPolicy BetaManagedAgentsGrepToolConfigParamsPermissionPolicyUnion Optional` Permission policy for this tool. Controls whether tool calls are auto-approved or require confirmation. - `type BetaManagedAgentsAlwaysAllowPolicy` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy` Tool calls require user confirmation before execution. - `type 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. - `type BetaManagedAgentsWebFetchToolConfigParams` Configuration override for the web_fetch tool. - `Type BetaManagedAgentsWebFetchToolConfigParamsType Optional` - `Name WebFetch` Must be "web_fetch". - `AllowedDomains []string Optional` Only fetch URLs whose host is one of these domains or a subdomain of one. Each entry is a plain hostname like "docs.example.com" (no scheme, port, or path). At most 64 entries; an empty list is rejected (omit the field instead). Cannot be combined with blocked_domains. - `BlockedDomains []string Optional` Never fetch URLs whose host is one of these domains or a subdomain of one. Each entry is a plain hostname like "ads.example.com" (no scheme, port, or path). At most 64 entries; an empty list is rejected (omit the field instead). Cannot be combined with allowed_domains. - `Enabled bool Optional` Whether this tool is enabled and available to Claude. Overrides the default_config setting. - `MaxContentTokens int64 Optional` Maximum number of tokens of fetched text content to include in context per call. Does not apply to binary content such as PDFs. format: int32 - `PermissionPolicy BetaManagedAgentsWebFetchToolConfigParamsPermissionPolicyUnion Optional` Permission policy for this tool. Controls whether tool calls are auto-approved or require confirmation. - `type BetaManagedAgentsAlwaysAllowPolicy` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy` Tool calls require user confirmation before execution. - `type 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. - `URLSources BetaManagedAgentsWebFetchURLSourcesParams Optional` Which sources contribute URLs the tool may fetch. Omit to allow every source. - `ClientToolResults BetaManagedAgentsWebFetchURLSourceToolFilterParamsUnion Optional` Which custom tools' results contribute URLs that may be fetched: "all" (the default), "none", or an only or except list. Each name in a list must be a custom tool in the same tools array. - `type BetaManagedAgentsWebFetchURLSourceShorthand string` String form of a url_sources value that has no field other than its type: "all" means {"type": "all"} and "none" means {"type": "none"}. - `const BetaManagedAgentsWebFetchURLSourceShorthandAll BetaManagedAgentsWebFetchURLSourceShorthand = "all"` - `const BetaManagedAgentsWebFetchURLSourceShorthandNone BetaManagedAgentsWebFetchURLSourceShorthand = "none"` - `type BetaManagedAgentsWebFetchURLSourceToolFilterUnion interface{…}` Which tools' results contribute URLs that may be fetched. - `type BetaManagedAgentsWebFetchURLSourceAll` Every URL from this source may be fetched. This is the default. - `Type All` - `type BetaManagedAgentsWebFetchURLSourceNone` This source contributes no URLs that may be fetched. - `Type None` - `type BetaManagedAgentsWebFetchURLSourceOnly` Only the named tools' results contribute URLs that may be fetched. - `Type Only` - `Tools []BetaManagedAgentsWebFetchURLSourceToolReference` 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. - `Type ToolReference` Must be "tool_reference". - `Name string` Name of the tool. Compared exactly, so upper and lower case letters are different. minLength: 1, maxLength: 128 - `type BetaManagedAgentsWebFetchURLSourceExcept` Every tool's results contribute URLs that may be fetched, except the named tools' results. - `Type Except` - `Tools []BetaManagedAgentsWebFetchURLSourceToolReference` 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. - `Type ToolReference` Must be "tool_reference". - `Name string` Name of the tool. Compared exactly, so upper and lower case letters are different. minLength: 1, maxLength: 128 - `ServerToolResults BetaManagedAgentsWebFetchURLSourceToolFilterParamsUnion Optional` Which of the web_search and web_fetch tools' results contribute URLs that may be fetched: "all" (the default), "none", or an only or except list. Each name in a list must be "web_search" or "web_fetch". - `UserInput BetaManagedAgentsWebFetchURLSourceUserInputParamsUnion Optional` Whether URLs in the text of user messages may be fetched: "all" (the default) or "none". - `type BetaManagedAgentsWebFetchURLSourceShorthand string` String form of a url_sources value that has no field other than its type: "all" means {"type": "all"} and "none" means {"type": "none"}. - `type BetaManagedAgentsWebFetchURLSourceUserInputUnion interface{…}` Whether URLs in the text of user messages may be fetched. - `type BetaManagedAgentsWebFetchURLSourceAll` Every URL from this source may be fetched. This is the default. - `type BetaManagedAgentsWebFetchURLSourceNone` This source contributes no URLs that may be fetched. - `type BetaManagedAgentsWebSearchToolConfigParams` Configuration override for the web_search tool. - `Type BetaManagedAgentsWebSearchToolConfigParamsType Optional` - `Name WebSearch` Must be "web_search". - `AllowedDomains []string Optional` Only return search results whose host is one of these domains or a subdomain of one. Each entry is a plain hostname like "docs.example.com" (no scheme or port; an optional path suffix is accepted). At most 64 entries; an empty list is rejected (omit the field instead). Cannot be combined with blocked_domains. - `BlockedDomains []string Optional` Never return search results whose host is one of these domains or a subdomain of one. Each entry is a plain hostname like "ads.example.com" (no scheme or port; an optional path suffix is accepted). At most 64 entries; an empty list is rejected (omit the field instead). Cannot be combined with allowed_domains. - `Enabled bool Optional` Whether this tool is enabled and available to Claude. Overrides the default_config setting. - `PermissionPolicy BetaManagedAgentsWebSearchToolConfigParamsPermissionPolicyUnion Optional` Permission policy for this tool. Controls whether tool calls are auto-approved or require confirmation. - `type BetaManagedAgentsAlwaysAllowPolicy` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy` Tool calls require user confirmation before execution. - `type 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. - `UserLocation BetaManagedAgentsUserLocationParam Optional` Approximate user location for search result localization. - `Type Approximate` Location precision. Only "approximate" is supported. - `City string Optional` City name. minLength: 1, maxLength: 255 - `Country string Optional` Two-letter ISO 3166-1 country code, uppercase. - `Region string Optional` Region or state name. minLength: 1, maxLength: 255 - `Timezone string Optional` IANA timezone identifier, e.g. "America/Los_Angeles". minLength: 1, maxLength: 255 - `DefaultConfig BetaManagedAgentsAgentToolsetDefaultConfigParams Optional` Default configuration applied to all tools in this set. - `Enabled bool Optional` Whether tools are enabled and available to Claude by default. Defaults to true if not specified. - `PermissionPolicy BetaManagedAgentsAgentToolsetDefaultConfigParamsPermissionPolicyUnion Optional` Default permission policy for tools. Controls whether tool calls are auto-approved or require confirmation. - `type BetaManagedAgentsAlwaysAllowPolicy` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy` Tool calls require user confirmation before execution. - `type 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. - `type BetaManagedAgentsMCPToolsetParams` Configuration for tools from an MCP server defined in `mcp_servers`. - `Type BetaManagedAgentsMCPToolsetParamsType` - `MCPServerName string` Name of the MCP server. Must match a server name from the mcp_servers array. 1-255 characters. minLength: 1, maxLength: 255 - `Configs []BetaManagedAgentsMCPToolConfigParams Optional` Per-tool configuration overrides. - `Name string` Name of the MCP tool to configure. 1-128 characters. minLength: 1, maxLength: 128 - `Enabled bool Optional` Whether this tool is enabled. Overrides the `default_config` setting. - `PermissionPolicy BetaManagedAgentsMCPToolConfigParamsPermissionPolicyUnion Optional` Permission policy for this tool. Overrides the `default_config` setting. - `type BetaManagedAgentsAlwaysAllowPolicy` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy` Tool calls require user confirmation before execution. - `type 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. - `DefaultConfig BetaManagedAgentsMCPToolsetDefaultConfigParams Optional` Default configuration for all tools from this server. - `Enabled bool Optional` Whether tools are enabled by default. Defaults to true if not specified. - `PermissionPolicy BetaManagedAgentsMCPToolsetDefaultConfigParamsPermissionPolicyUnion Optional` Default permission policy for tools from this server. - `type BetaManagedAgentsAlwaysAllowPolicy` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy` Tool calls require user confirmation before execution. - `type 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. - `type BetaManagedAgentsCustomToolParams` A custom tool that is executed by the API client rather than the agent. When the agent calls this tool, an `agent.custom_tool_use` event is emitted and the session goes idle, waiting for the client to provide the result via a `user.custom_tool_result` event. - `Type BetaManagedAgentsCustomToolParamsType` - `Description string` Description of what the tool does, shown to the agent to help it decide when to use the tool. minLength: 1 - `InputSchema BetaManagedAgentsCustomToolInputSchemaParam` JSON Schema defining the expected input parameters for the tool. - `Type Object` - `Properties map[string, any] Optional` - `Required []string Optional` - `Name string` Unique name for the tool. 1-128 characters; letters, digits, underscores, and hyphens. minLength: 1, maxLength: 128 - `Betas []AnthropicBeta Optional` (header parameter) This endpoint is in beta: requests must send `managed-agents-2026-04-01` in this header. - `const AnthropicBetaMessageBatches2024_09_24 AnthropicBeta = "message-batches-2024-09-24"` - `const AnthropicBetaPromptCaching2024_07_31 AnthropicBeta = "prompt-caching-2024-07-31"` - `const AnthropicBetaComputerUse2024_10_22 AnthropicBeta = "computer-use-2024-10-22"` - `const AnthropicBetaComputerUse2025_01_24 AnthropicBeta = "computer-use-2025-01-24"` - `const AnthropicBetaPDFs2024_09_25 AnthropicBeta = "pdfs-2024-09-25"` - `const AnthropicBetaTokenCounting2024_11_01 AnthropicBeta = "token-counting-2024-11-01"` - `const AnthropicBetaTokenEfficientTools2025_02_19 AnthropicBeta = "token-efficient-tools-2025-02-19"` - `const AnthropicBetaOutput128k2025_02_19 AnthropicBeta = "output-128k-2025-02-19"` - `const AnthropicBetaFilesAPI2025_04_14 AnthropicBeta = "files-api-2025-04-14"` - `const AnthropicBetaMCPClient2025_04_04 AnthropicBeta = "mcp-client-2025-04-04"` - `const AnthropicBetaMCPClient2025_11_20 AnthropicBeta = "mcp-client-2025-11-20"` - `const AnthropicBetaDevFullThinking2025_05_14 AnthropicBeta = "dev-full-thinking-2025-05-14"` - `const AnthropicBetaInterleavedThinking2025_05_14 AnthropicBeta = "interleaved-thinking-2025-05-14"` - `const AnthropicBetaCodeExecution2025_05_22 AnthropicBeta = "code-execution-2025-05-22"` - `const AnthropicBetaExtendedCacheTTL2025_04_11 AnthropicBeta = "extended-cache-ttl-2025-04-11"` - `const AnthropicBetaContext1m2025_08_07 AnthropicBeta = "context-1m-2025-08-07"` - `const AnthropicBetaContextManagement2025_06_27 AnthropicBeta = "context-management-2025-06-27"` - `const AnthropicBetaModelContextWindowExceeded2025_08_26 AnthropicBeta = "model-context-window-exceeded-2025-08-26"` - `const AnthropicBetaSkills2025_10_02 AnthropicBeta = "skills-2025-10-02"` - `const AnthropicBetaFastMode2026_02_01 AnthropicBeta = "fast-mode-2026-02-01"` - `const AnthropicBetaOutput300k2026_03_24 AnthropicBeta = "output-300k-2026-03-24"` - `const AnthropicBetaUserProfiles2026_03_24 AnthropicBeta = "user-profiles-2026-03-24"` - `const AnthropicBetaUserProfiles2026_08_18 AnthropicBeta = "user-profiles-2026-08-18"` - `const AnthropicBetaUserProfiles2026_09_04 AnthropicBeta = "user-profiles-2026-09-04"` - `const AnthropicBetaAdvisorTool2026_03_01 AnthropicBeta = "advisor-tool-2026-03-01"` - `const AnthropicBetaManagedAgents2026_04_01 AnthropicBeta = "managed-agents-2026-04-01"` - `const AnthropicBetaCacheDiagnosis2026_04_07 AnthropicBeta = "cache-diagnosis-2026-04-07"` - `const AnthropicBetaDreaming2026_04_21 AnthropicBeta = "dreaming-2026-04-21"` - `const AnthropicBetaThinkingTokenCount2026_05_13 AnthropicBeta = "thinking-token-count-2026-05-13"` - `const AnthropicBetaServerSideFallback2026_06_01 AnthropicBeta = "server-side-fallback-2026-06-01"` - `const AnthropicBetaServerSideFallback2026_07_01 AnthropicBeta = "server-side-fallback-2026-07-01"` - `const AnthropicBetaFallbackCredit2026_06_01 AnthropicBeta = "fallback-credit-2026-06-01"` - `const AnthropicBetaFallbackCredit2026_07_01 AnthropicBeta = "fallback-credit-2026-07-01"` - `const AnthropicBetaAgentMemory2026_07_22 AnthropicBeta = "agent-memory-2026-07-22"` - `const AnthropicBetaMidConversationToolChanges2026_07_01 AnthropicBeta = "mid-conversation-tool-changes-2026-07-01"` - `const AnthropicBetaCompact2026_01_12 AnthropicBeta = "compact-2026-01-12"` - `const AnthropicBetaComputerUse2025_11_24 AnthropicBeta = "computer-use-2025-11-24"` - `const AnthropicBetaMCPTunnels2026_06_22 AnthropicBeta = "mcp-tunnels-2026-06-22"` - `const AnthropicBetaStructuredOutputs2025_11_13 AnthropicBeta = "structured-outputs-2025-11-13"` - `const AnthropicBetaTaskBudgets2026_03_13 AnthropicBeta = "task-budgets-2026-03-13"` - `const AnthropicBetaThinkingDisplayUpdates2026_08_18 AnthropicBeta = "thinking-display-updates-2026-08-18"` - `const AnthropicBetaCEUserManagement2026_07_13 AnthropicBeta = "ce-user-management-2026-07-13"` - `const AnthropicBetaMidConversationOutputConfig2026_07_01 AnthropicBeta = "mid-conversation-output-config-2026-07-01"` - `const AnthropicBetaThinkingBindingControls2026_08_01 AnthropicBeta = "thinking-binding-controls-2026-08-01"` - `const AnthropicBetaMidConversationSystemClearAt2026_08_21 AnthropicBeta = "mid-conversation-system-clear-at-2026-08-21"` - `const AnthropicBetaCompact2026_09_04 AnthropicBeta = "compact-2026-09-04"` - `const AnthropicBetaInlineTools2026_09_15 AnthropicBeta = "inline-tools-2026-09-15"` - `const AnthropicBetaMCPClient2026_09_15 AnthropicBeta = "mcp-client-2026-09-15"` - `const AnthropicBetaCEPlugins2026_09_01 AnthropicBeta = "ce-plugins-2026-09-01"` - `const AnthropicBetaSpendLimitReads2026_09_26 AnthropicBeta = "spend-limit-reads-2026-09-26"` - `const AnthropicBetaTelemetryDestinations2026_08_11 AnthropicBeta = "telemetry-destinations-2026-08-11"` - `WorkspaceID param.Opt[string] Optional` (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 - `type BetaManagedAgentsAgent` A Managed Agents `agent`. - `Type BetaManagedAgentsAgentType` - `ID string` - `ArchivedAt Time` When the agent was archived. Null if not archived. format: date-time - `CreatedAt Time` A timestamp in RFC 3339 format format: date-time - `Description string` - `ExecutionIdentity BetaManagedAgentsExecutionIdentityUnion` Execution principal for runs of this agent. Always present; `{"type": "service_account"}` when runs carry no customer-named principal. - `type BetaManagedAgentsAWSRoleExecutionIdentity` An AWS IAM role principal as returned in API responses. - `Type AWSRole` - `RoleARN string` The IAM role's ARN. - `type BetaManagedAgentsServiceAccountExecutionIdentity` The Anthropic-managed service account as returned in API responses. - `Type ServiceAccount` - `MCPServers []BetaManagedAgentsMCPServerURLDefinition` - `Type BetaManagedAgentsMCPServerURLDefinitionType` - `Name string` - `URL string` - `Metadata map[string, string]` - `Model BetaManagedAgentsModelConfig` Model identifier and configuration. - `ID BetaManagedAgentsModel` The model that will power your agent. See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options. - `const BetaManagedAgentsModelClaudeHaiku5_5 BetaManagedAgentsModel = "claude-haiku-5-5"` Fastest model for high-volume, real-time tasks - `const BetaManagedAgentsModelClaudeSonnet5_5 BetaManagedAgentsModel = "claude-sonnet-5-5"` Efficient model for coding and agents - `const BetaManagedAgentsModelClaudeOpus5_5 BetaManagedAgentsModel = "claude-opus-5-5"` Powerful intelligence for coding, knowledge work, and long-running agents - `const BetaManagedAgentsModelClaudeFable5_1 BetaManagedAgentsModel = "claude-fable-5-1"` Frontier intelligence for ambitious tasks across coding, scientific discovery, and enterprise workflows - `const BetaManagedAgentsModelClaudeSonnet5 BetaManagedAgentsModel = "claude-sonnet-5"` Efficient model for coding and agents - `const BetaManagedAgentsModelClaudeFable5 BetaManagedAgentsModel = "claude-fable-5"` Next generation of intelligence for the hardest knowledge work and coding problems - `const BetaManagedAgentsModelClaudeOpus5 BetaManagedAgentsModel = "claude-opus-5"` Powerful intelligence for long-running agents and coding - `const BetaManagedAgentsModelClaudeOpus4_8 BetaManagedAgentsModel = "claude-opus-4-8"` Powerful intelligence for long-running agents and coding - `const BetaManagedAgentsModelClaudeOpus4_7 BetaManagedAgentsModel = "claude-opus-4-7"` Powerful intelligence for long-running agents and coding - `const BetaManagedAgentsModelClaudeOpus4_6 BetaManagedAgentsModel = "claude-opus-4-6"` Powerful intelligence for long-running agents and coding - `const BetaManagedAgentsModelClaudeSonnet4_6 BetaManagedAgentsModel = "claude-sonnet-4-6"` Best combination of speed and intelligence - `const BetaManagedAgentsModelClaudeHaiku4_5 BetaManagedAgentsModel = "claude-haiku-4-5"` - `const BetaManagedAgentsModelClaudeHaiku4_5_20251001 BetaManagedAgentsModel = "claude-haiku-4-5-20251001"` - `const BetaManagedAgentsModelClaudeOpus4_5 BetaManagedAgentsModel = "claude-opus-4-5"` Powerful intelligence for long-running agents and coding - `const BetaManagedAgentsModelClaudeOpus4_5_20251101 BetaManagedAgentsModel = "claude-opus-4-5-20251101"` Powerful intelligence for long-running agents and coding - `const BetaManagedAgentsModelClaudeSonnet4_5 BetaManagedAgentsModel = "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 - `const BetaManagedAgentsModelClaudeSonnet4_5_20250929 BetaManagedAgentsModel = "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 - `Effort BetaManagedAgentsModelConfigEffortUnion Optional` 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. - `type BetaManagedAgentsEffortLow` Low effort. Favors latency over reasoning depth. - `Type BetaManagedAgentsEffortLowType` - `type BetaManagedAgentsEffortMedium` Medium effort. Balances latency and reasoning depth. - `Type BetaManagedAgentsEffortMediumType` - `type BetaManagedAgentsEffortHigh` High effort. Favors reasoning depth. - `Type BetaManagedAgentsEffortHighType` - `type BetaManagedAgentsEffortXhigh` Extra-high effort. Not all models accept this level. - `Type BetaManagedAgentsEffortXhighType` - `type BetaManagedAgentsEffortMax` Maximum effort. Favors reasoning depth over latency. - `Type BetaManagedAgentsEffortMaxType` - `InferenceGeo string Optional` Geographic region for model inference. When unset, requests fall through to the workspace's default_inference_geo. - `Speed BetaManagedAgentsModelConfigSpeed Optional` 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. - `const BetaManagedAgentsModelConfigSpeedStandard BetaManagedAgentsModelConfigSpeed = "standard"` - `const BetaManagedAgentsModelConfigSpeedFast BetaManagedAgentsModelConfigSpeed = "fast"` - `Multiagent BetaManagedAgentsMultiagentUnion` Multiagent orchestration configuration. Null when the agent is single-threaded. - `type BetaManagedAgentsMultiagentCoordinator` Resolved coordinator topology with a concrete agent roster. - `Type BetaManagedAgentsMultiagentCoordinatorType` - `Agents []BetaManagedAgentsMultiagentCoordinatorAgentUnion` Agents the coordinator may spawn as session threads, each resolved to a specific version. - `type BetaManagedAgentsAgentReference` A resolved agent reference with a concrete version. - `Type BetaManagedAgentsAgentReferenceType` - `ID string` - `Version int64` format: int32 - `type BetaManagedAgentsAdvisor` Platform advisor roster entry: a model the session's primary thread may consult mid-turn. - `Type BetaManagedAgentsAdvisorType` - `Model string` The advisor model id. - `type BetaManagedAgentsMultiagent20261001` Resolved multiagent configuration with three members, each enabled or disabled on its own. - `Type Multiagent20261001` - `Advisor BetaManagedAgentsMultiagentAdvisorUnion` Whether the session's primary thread can consult an advisor model. - `type BetaManagedAgentsMultiagentAdvisorEnabled` The session's primary thread can consult `model` mid-turn. - `Type Enabled` - `Model string` The advisor model id. - `type BetaManagedAgentsMultiagentAdvisorDisabled` The agent has no advisor. - `Type Disabled` - `Subagents BetaManagedAgentsMultiagentSubagentsUnion` Whether the agent can spawn session threads. - `type BetaManagedAgentsMultiagentSubagentsEnabled` The agent can spawn session threads. - `Type Enabled` - `InlineAgents BetaManagedAgentsMultiagentInlineAgentsUnion` Whether the agent can define inline agents, which are not saved, when it spawns session threads. - `type BetaManagedAgentsMultiagentInlineAgentsEnabled` The agent can define inline agents. - `Type Enabled` - `type BetaManagedAgentsMultiagentInlineAgentsDisabled` The agent cannot define inline agents. - `Type Disabled` - `PredefinedAgents []BetaManagedAgentsAgentReference` Predefined agents, which are saved agents that this agent can spawn as session threads, each resolved to a specific version. - `Type BetaManagedAgentsAgentReferenceType` - `ID string` - `Version int64` format: int32 - `type BetaManagedAgentsMultiagentSubagentsDisabled` The agent cannot spawn session threads. - `Type Disabled` - `Workflows BetaManagedAgentsMultiagentWorkflowsUnion` Whether the agent can start workflow runs. - `type BetaManagedAgentsMultiagentWorkflowsEnabled` The agent can start workflow runs. - `Type Enabled` - `InlineAgents BetaManagedAgentsMultiagentInlineAgentsUnion` Whether a run's plan can define inline agents, which are not saved. - `PredefinedAgents []BetaManagedAgentsAgentReference` Predefined agents, which are saved agents that a run's plan can use, each resolved to a specific version. - `Type BetaManagedAgentsAgentReferenceType` - `ID string` - `Version int64` format: int32 - `type BetaManagedAgentsMultiagentWorkflowsDisabled` The agent cannot start workflow runs. - `Type Disabled` - `Name string` - `Skills []BetaManagedAgentsAgentSkillUnion` - `type BetaManagedAgentsAnthropicSkill` A resolved Anthropic-managed skill. - `Type BetaManagedAgentsAnthropicSkillType` - `SkillID string` - `Version string` - `type BetaManagedAgentsCustomSkill` A resolved user-created custom skill. - `Type BetaManagedAgentsCustomSkillType` - `SkillID string` - `Version string` - `System string` - `Tools []BetaManagedAgentsAgentToolUnion` - `type BetaManagedAgentsAgentToolset20260401` - `Type BetaManagedAgentsAgentToolset20260401Type` - `Configs []BetaManagedAgentsAgentToolConfigUnion` - `type BetaManagedAgentsBashToolConfig` Configuration for the bash tool. - `Type Bash` - `Enabled bool` - `Name Bash` - `PermissionPolicy BetaManagedAgentsBashToolConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy` Tool calls are automatically approved without user confirmation. - `Type BetaManagedAgentsAlwaysAllowPolicyType` - `type BetaManagedAgentsAlwaysAskPolicy` Tool calls require user confirmation before execution. - `Type BetaManagedAgentsAlwaysAskPolicyType` - `type 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. - `Type Auto` - `type BetaManagedAgentsEditToolConfig` Configuration for the edit tool. - `Type Edit` - `Enabled bool` - `Name Edit` - `PermissionPolicy BetaManagedAgentsEditToolConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy` Tool calls require user confirmation before execution. - `type 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. - `type BetaManagedAgentsReadToolConfig` Configuration for the read tool. - `Type Read` - `Enabled bool` - `Name Read` - `PermissionPolicy BetaManagedAgentsReadToolConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy` Tool calls require user confirmation before execution. - `type 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. - `type BetaManagedAgentsWriteToolConfig` Configuration for the write tool. - `Type Write` - `Enabled bool` - `Name Write` - `PermissionPolicy BetaManagedAgentsWriteToolConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy` Tool calls require user confirmation before execution. - `type 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. - `type BetaManagedAgentsGlobToolConfig` Configuration for the glob tool. - `Type Glob` - `Enabled bool` - `Name Glob` - `PermissionPolicy BetaManagedAgentsGlobToolConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy` Tool calls require user confirmation before execution. - `type 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. - `type BetaManagedAgentsGrepToolConfig` Configuration for the grep tool. - `Type Grep` - `Enabled bool` - `Name Grep` - `PermissionPolicy BetaManagedAgentsGrepToolConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy` Tool calls require user confirmation before execution. - `type 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. - `type BetaManagedAgentsWebFetchToolConfig` Configuration for the web_fetch tool. - `Type WebFetch` - `Enabled bool` - `Name WebFetch` - `PermissionPolicy BetaManagedAgentsWebFetchToolConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy` Tool calls require user confirmation before execution. - `type 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. - `URLSources BetaManagedAgentsWebFetchURLSources` Which sources contribute URLs the tool may fetch, always in the object form. Null when not set, which allows every source. - `ClientToolResults BetaManagedAgentsWebFetchURLSourceToolFilterUnion` Which custom tools' results contribute URLs that may be fetched. Null when not set, which allows every custom tool's results. - `type BetaManagedAgentsWebFetchURLSourceAll` Every URL from this source may be fetched. This is the default. - `Type All` - `type BetaManagedAgentsWebFetchURLSourceNone` This source contributes no URLs that may be fetched. - `Type None` - `type BetaManagedAgentsWebFetchURLSourceOnly` Only the named tools' results contribute URLs that may be fetched. - `Type Only` - `Tools []BetaManagedAgentsWebFetchURLSourceToolReference` 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. - `Type ToolReference` Must be "tool_reference". - `Name string` Name of the tool. Compared exactly, so upper and lower case letters are different. minLength: 1, maxLength: 128 - `type BetaManagedAgentsWebFetchURLSourceExcept` Every tool's results contribute URLs that may be fetched, except the named tools' results. - `Type Except` - `Tools []BetaManagedAgentsWebFetchURLSourceToolReference` 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. - `Type ToolReference` Must be "tool_reference". - `Name string` Name of the tool. Compared exactly, so upper and lower case letters are different. minLength: 1, maxLength: 128 - `ServerToolResults BetaManagedAgentsWebFetchURLSourceToolFilterUnion` Which of the web_search and web_fetch tools' results contribute URLs that may be fetched. Null when not set, which allows both. - `UserInput BetaManagedAgentsWebFetchURLSourceUserInputUnion` Whether URLs in the text of user messages may be fetched. Null when not set, which allows them. - `type BetaManagedAgentsWebFetchURLSourceAll` Every URL from this source may be fetched. This is the default. - `type BetaManagedAgentsWebFetchURLSourceNone` This source contributes no URLs that may be fetched. - `AllowedDomains []string Optional` - `BlockedDomains []string Optional` - `MaxContentTokens int64 Optional` format: int32 - `type BetaManagedAgentsWebSearchToolConfig` Configuration for the web_search tool. - `Type WebSearch` - `Enabled bool` - `Name WebSearch` - `PermissionPolicy BetaManagedAgentsWebSearchToolConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy` Tool calls require user confirmation before execution. - `type 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. - `AllowedDomains []string Optional` - `BlockedDomains []string Optional` - `UserLocation BetaManagedAgentsUserLocation Optional` Approximate user location for search result localization. - `Type Approximate` Location precision. Only "approximate" is supported. - `City string Optional` City name. minLength: 1, maxLength: 255 - `Country string Optional` Two-letter ISO 3166-1 country code, uppercase. - `Region string Optional` Region or state name. minLength: 1, maxLength: 255 - `Timezone string Optional` IANA timezone identifier, e.g. "America/Los_Angeles". minLength: 1, maxLength: 255 - `DefaultConfig BetaManagedAgentsAgentToolsetDefaultConfig` Resolved default configuration for agent tools. - `Enabled bool` - `PermissionPolicy BetaManagedAgentsAgentToolsetDefaultConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy` Tool calls require user confirmation before execution. - `type 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. - `type BetaManagedAgentsMCPToolset` - `Type BetaManagedAgentsMCPToolsetType` - `Configs []BetaManagedAgentsMCPToolConfig` - `Enabled bool` - `Name string` - `PermissionPolicy BetaManagedAgentsMCPToolConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy` Tool calls require user confirmation before execution. - `type 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. - `DefaultConfig BetaManagedAgentsMCPToolsetDefaultConfig` Resolved default configuration for all tools from an MCP server. - `Enabled bool` - `PermissionPolicy BetaManagedAgentsMCPToolsetDefaultConfigPermissionPolicyUnion` Permission policy for tool execution. - `type BetaManagedAgentsAlwaysAllowPolicy` Tool calls are automatically approved without user confirmation. - `type BetaManagedAgentsAlwaysAskPolicy` Tool calls require user confirmation before execution. - `type 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. - `MCPServerName string` - `type BetaManagedAgentsCustomTool` A custom tool as returned in API responses. - `Type BetaManagedAgentsCustomToolType` - `Description string` - `InputSchema BetaManagedAgentsCustomToolInputSchema` JSON Schema for custom tool input parameters. - `Type Object` - `Properties map[string, any] Optional` - `Required []string Optional` - `Name string` - `UpdatedAt Time` A timestamp in RFC 3339 format format: date-time - `Version int64` The agent's current version. Starts at 1 and increments when the agent is modified. format: int32 ## Example ```go package main import ( "context" "fmt" "github.com/anthropics/anthropic-sdk-go" "github.com/anthropics/anthropic-sdk-go/option" ) func main() { client := anthropic.NewClient( option.WithAPIKey("my-anthropic-api-key"), ) betaManagedAgentsAgent, err := client.Beta.Agents.New(context.TODO(), anthropic.BetaAgentNewParams{ Model: anthropic.BetaManagedAgentsModelConfigParams{ ID: anthropic.BetaManagedAgentsModelClaudeOpus5_5, }, Name: "My First Agent", }) if err != nil { panic(err.Error()) } fmt.Printf("%+v\n", betaManagedAgentsAgent.ID) } ``` ### Response (200) ```json { "id": "agent_011CZkYpogX7uDKUyvBTophP", "archived_at": null, "created_at": "2026-03-15T10:00:00Z", "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" } ], "metadata": { "foo": "bar" }, "model": { "id": "claude-opus-5-5", "effort": { "type": "low" }, "inference_geo": "inference_geo", "speed": "standard" }, "multiagent": { "advisor": { "type": "disabled" }, "subagents": { "inline_agents": { "type": "enabled" }, "predefined_agents": [ { "id": "agent_011CZkYqphY8vELVzwCUpqiQ", "type": "agent", "version": 1 } ], "type": "enabled" }, "type": "multiagent_20261001", "workflows": { "inline_agents": { "type": "enabled" }, "predefined_agents": [ { "id": "agent_011CZkYqphY8vELVzwCUpqiQ", "type": "agent", "version": 1 } ], "type": "enabled" } }, "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", "updated_at": "2026-03-15T10:00:00Z", "version": 1 } ```