Anthropic Managed Agents API

openapi: 3.1.0
info:
  title: Anthropic Managed Agents API
  description: >
    Claude Managed Agents is a fully managed agent harness for running Claude
    as an autonomous agent with secure sandboxing, built-in tools, and
    server-sent event streaming. Define reusable, versioned Agents, configure
    Environments (cloud containers or self-hosted sandboxes), and run
    stateful Sessions that perform long-running tasks. All endpoints require
    the managed-agents-2026-04-01 beta header.
  version: 2026-04-01
  contact:
    name: Anthropic Support
    url: https://support.claude.com
  license:
    name: Anthropic Terms of Service
    url: https://www.anthropic.com/terms
servers:
  - url: https://api.anthropic.com
    description: Production Server
security:
  - ApiKeyAuth: []
tags:
  - name: Agents
    description: Reusable, versioned agent configurations
  - name: Sessions
    description: Stateful agent execution instances
  - name: Environments
    description: Container configuration for agent sessions
  - name: Events
    description: User messages and tool results sent to a session
paths:
  /v1/agents:
    post:
      summary: Anthropic Create Agent
      description: Define a reusable, versioned agent.
      operationId: createAgent
      tags:
        - Agents
      parameters:
        - $ref: '#/components/parameters/AnthropicVersion'
        - $ref: '#/components/parameters/AnthropicBeta'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/CreateAgentRequest'
      responses:
        '200':
          description: Agent created.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Agent'
        '4XX':
          $ref: '#/components/responses/ErrorResponse'
    get:
      summary: Anthropic List Agents
      description: Paginated list of agents in the workspace.
      operationId: listAgents
      tags:
        - Agents
      parameters:
        - $ref: '#/components/parameters/AnthropicVersion'
        - $ref: '#/components/parameters/AnthropicBeta'
        - $ref: '#/components/parameters/Limit'
      responses:
        '200':
          description: List of agents.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/AgentList'
  /v1/agents/{agent_id}:
    get:
      summary: Anthropic Get Agent
      description: Retrieve an agent's latest version.
      operationId: getAgent
      tags:
        - Agents
      parameters:
        - $ref: '#/components/parameters/AnthropicVersion'
        - $ref: '#/components/parameters/AnthropicBeta'
        - $ref: '#/components/parameters/AgentIdPath'
      responses:
        '200':
          description: Agent retrieved.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Agent'
    post:
      summary: Anthropic Update Agent
      description: >
        Update an agent. Pass the current version to optimistically lock the
        update. A new version is created when fields change.
      operationId: updateAgent
      tags:
        - Agents
      parameters:
        - $ref: '#/components/parameters/AnthropicVersion'
        - $ref: '#/components/parameters/AnthropicBeta'
        - $ref: '#/components/parameters/AgentIdPath'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/UpdateAgentRequest'
      responses:
        '200':
          description: Agent updated; new version returned.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Agent'
  /v1/agents/{agent_id}/archive:
    post:
      summary: Anthropic Archive Agent
      description: Archive an agent; existing sessions continue running.
      operationId: archiveAgent
      tags:
        - Agents
      parameters:
        - $ref: '#/components/parameters/AnthropicVersion'
        - $ref: '#/components/parameters/AnthropicBeta'
        - $ref: '#/components/parameters/AgentIdPath'
      responses:
        '200':
          description: Agent archived.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Agent'
  /v1/agents/{agent_id}/versions:
    get:
      summary: Anthropic List Agent Versions
      description: Full version history for the agent.
      operationId: listAgentVersions
      tags:
        - Agents
      parameters:
        - $ref: '#/components/parameters/AnthropicVersion'
        - $ref: '#/components/parameters/AnthropicBeta'
        - $ref: '#/components/parameters/AgentIdPath'
      responses:
        '200':
          description: Agent versions.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/AgentList'
  /v1/environments:
    post:
      summary: Anthropic Create Environment
      description: Create a container configuration for sessions.
      operationId: createEnvironment
      tags:
        - Environments
      parameters:
        - $ref: '#/components/parameters/AnthropicVersion'
        - $ref: '#/components/parameters/AnthropicBeta'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/CreateEnvironmentRequest'
      responses:
        '200':
          description: Environment created.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Environment'
    get:
      summary: Anthropic List Environments
      description: Paginated list of environments.
      operationId: listEnvironments
      tags:
        - Environments
      parameters:
        - $ref: '#/components/parameters/AnthropicVersion'
        - $ref: '#/components/parameters/AnthropicBeta'
      responses:
        '200':
          description: Environments.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/EnvironmentList'
  /v1/environments/{environment_id}:
    get:
      summary: Anthropic Get Environment
      operationId: getEnvironment
      tags:
        - Environments
      parameters:
        - $ref: '#/components/parameters/AnthropicVersion'
        - $ref: '#/components/parameters/AnthropicBeta'
        - $ref: '#/components/parameters/EnvironmentIdPath'
      responses:
        '200':
          description: Environment.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Environment'
    delete:
      summary: Anthropic Delete Environment
      operationId: deleteEnvironment
      tags:
        - Environments
      parameters:
        - $ref: '#/components/parameters/AnthropicVersion'
        - $ref: '#/components/parameters/AnthropicBeta'
        - $ref: '#/components/parameters/EnvironmentIdPath'
      responses:
        '200':
          description: Environment deleted.
  /v1/environments/{environment_id}/archive:
    post:
      summary: Anthropic Archive Environment
      operationId: archiveEnvironment
      tags:
        - Environments
      parameters:
        - $ref: '#/components/parameters/AnthropicVersion'
        - $ref: '#/components/parameters/AnthropicBeta'
        - $ref: '#/components/parameters/EnvironmentIdPath'
      responses:
        '200':
          description: Environment archived.
  /v1/sessions:
    post:
      summary: Anthropic Create Session
      description: Create a stateful agent execution instance.
      operationId: createSession
      tags:
        - Sessions
      parameters:
        - $ref: '#/components/parameters/AnthropicVersion'
        - $ref: '#/components/parameters/AnthropicBeta'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/CreateSessionRequest'
      responses:
        '200':
          description: Session created.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Session'
    get:
      summary: Anthropic List Sessions
      operationId: listSessions
      tags:
        - Sessions
      parameters:
        - $ref: '#/components/parameters/AnthropicVersion'
        - $ref: '#/components/parameters/AnthropicBeta'
        - name: agent_id
          in: query
          required: false
          schema:
            type: string
        - name: status
          in: query
          required: false
          schema:
            type: string
            enum:
              - idle
              - running
              - rescheduling
              - terminated
      responses:
        '200':
          description: Sessions.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/SessionList'
  /v1/sessions/{session_id}:
    get:
      summary: Anthropic Get Session
      operationId: getSession
      tags:
        - Sessions
      parameters:
        - $ref: '#/components/parameters/AnthropicVersion'
        - $ref: '#/components/parameters/AnthropicBeta'
        - $ref: '#/components/parameters/SessionIdPath'
      responses:
        '200':
          description: Session.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Session'
    post:
      summary: Anthropic Update Session
      description: Update a session's tools, mcp_servers, or other config.
      operationId: updateSession
      tags:
        - Sessions
      parameters:
        - $ref: '#/components/parameters/AnthropicVersion'
        - $ref: '#/components/parameters/AnthropicBeta'
        - $ref: '#/components/parameters/SessionIdPath'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
      responses:
        '200':
          description: Session updated.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Session'
    delete:
      summary: Anthropic Delete Session
      operationId: deleteSession
      tags:
        - Sessions
      parameters:
        - $ref: '#/components/parameters/AnthropicVersion'
        - $ref: '#/components/parameters/AnthropicBeta'
        - $ref: '#/components/parameters/SessionIdPath'
      responses:
        '200':
          description: Session deleted.
  /v1/sessions/{session_id}/archive:
    post:
      summary: Anthropic Archive Session
      operationId: archiveSession
      tags:
        - Sessions
      parameters:
        - $ref: '#/components/parameters/AnthropicVersion'
        - $ref: '#/components/parameters/AnthropicBeta'
        - $ref: '#/components/parameters/SessionIdPath'
      responses:
        '200':
          description: Session archived.
  /v1/sessions/{session_id}/events:
    post:
      summary: Anthropic Send Session Events
      description: >
        Send user events to drive session execution. Event types include
        user.message, tool.result, and interrupt.
      operationId: sendSessionEvents
      tags:
        - Events
      parameters:
        - $ref: '#/components/parameters/AnthropicVersion'
        - $ref: '#/components/parameters/AnthropicBeta'
        - $ref: '#/components/parameters/SessionIdPath'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/EventBatch'
      responses:
        '200':
          description: Events accepted.
  /v1/sessions/{session_id}/stream:
    get:
      summary: Anthropic Stream Session Events
      description: >
        Server-sent events stream of agent execution: assistant messages,
        tool calls, tool results, and status changes.
      operationId: streamSession
      tags:
        - Events
      parameters:
        - $ref: '#/components/parameters/AnthropicVersion'
        - $ref: '#/components/parameters/AnthropicBeta'
        - $ref: '#/components/parameters/SessionIdPath'
      responses:
        '200':
          description: SSE stream of session events.
          content:
            text/event-stream:
              schema:
                type: string
components:
  securitySchemes:
    ApiKeyAuth:
      type: apiKey
      in: header
      name: x-api-key
  parameters:
    AnthropicVersion:
      name: anthropic-version
      in: header
      required: true
      schema:
        type: string
        default: "2023-06-01"
    AnthropicBeta:
      name: anthropic-beta
      in: header
      required: true
      description: Must include managed-agents-2026-04-01.
      schema:
        type: string
        default: managed-agents-2026-04-01
    Limit:
      name: limit
      in: query
      required: false
      schema:
        type: integer
        default: 20
    AgentIdPath:
      name: agent_id
      in: path
      required: true
      schema:
        type: string
    EnvironmentIdPath:
      name: environment_id
      in: path
      required: true
      schema:
        type: string
    SessionIdPath:
      name: session_id
      in: path
      required: true
      schema:
        type: string
  schemas:
    CreateAgentRequest:
      type: object
      required:
        - name
        - model
      properties:
        name:
          type: string
          example: Coding Assistant
        model:
          oneOf:
            - type: string
              example: claude-opus-4-7
            - type: object
              properties:
                id:
                  type: string
                speed:
                  type: string
                  enum:
                    - standard
                    - fast
        system:
          type: string
        description:
          type: string
        tools:
          type: array
          items:
            type: object
        mcp_servers:
          type: array
          items:
            type: object
        skills:
          type: array
          items:
            type: object
        multiagent:
          type: object
        metadata:
          type: object
    UpdateAgentRequest:
      type: object
      required:
        - version
      properties:
        version:
          type: integer
        name:
          type: string
        model:
          oneOf:
            - type: string
            - type: object
        system:
          type: string
          nullable: true
        description:
          type: string
          nullable: true
        tools:
          type: array
          items:
            type: object
        mcp_servers:
          type: array
          items:
            type: object
        skills:
          type: array
          items:
            type: object
        metadata:
          type: object
    Agent:
      type: object
      properties:
        id:
          type: string
        type:
          type: string
          example: agent
        name:
          type: string
        model:
          type: object
          properties:
            id:
              type: string
            speed:
              type: string
        system:
          type: string
          nullable: true
        description:
          type: string
          nullable: true
        tools:
          type: array
          items:
            type: object
        skills:
          type: array
          items:
            type: object
        mcp_servers:
          type: array
          items:
            type: object
        metadata:
          type: object
        version:
          type: integer
        created_at:
          type: string
          format: date-time
        updated_at:
          type: string
          format: date-time
        archived_at:
          type: string
          format: date-time
          nullable: true
    AgentList:
      type: object
      properties:
        data:
          type: array
          items:
            $ref: '#/components/schemas/Agent'
        has_more:
          type: boolean
    CreateEnvironmentRequest:
      type: object
      required:
        - name
        - config
      properties:
        name:
          type: string
        config:
          type: object
          required:
            - type
          properties:
            type:
              type: string
              enum:
                - cloud
                - self_hosted
            packages:
              type: object
              additionalProperties:
                type: array
                items:
                  type: string
            networking:
              type: object
              properties:
                type:
                  type: string
                  enum:
                    - unrestricted
                    - limited
                allowed_hosts:
                  type: array
                  items:
                    type: string
                allow_mcp_servers:
                  type: boolean
                allow_package_managers:
                  type: boolean
    Environment:
      type: object
      properties:
        id:
          type: string
        type:
          type: string
          example: environment
        name:
          type: string
        config:
          type: object
        created_at:
          type: string
          format: date-time
        archived_at:
          type: string
          format: date-time
          nullable: true
    EnvironmentList:
      type: object
      properties:
        data:
          type: array
          items:
            $ref: '#/components/schemas/Environment'
        has_more:
          type: boolean
    CreateSessionRequest:
      type: object
      required:
        - agent
        - environment_id
      properties:
        agent:
          oneOf:
            - type: string
              description: Agent ID; uses the latest version.
            - type: object
              properties:
                type:
                  type: string
                  enum:
                    - agent
                id:
                  type: string
                version:
                  type: integer
        environment_id:
          type: string
        vault_ids:
          type: array
          items:
            type: string
    Session:
      type: object
      properties:
        id:
          type: string
        type:
          type: string
          example: session
        agent:
          type: object
        environment_id:
          type: string
        status:
          type: string
          enum:
            - idle
            - running
            - rescheduling
            - terminated
        created_at:
          type: string
          format: date-time
        archived_at:
          type: string
          format: date-time
          nullable: true
    SessionList:
      type: object
      properties:
        data:
          type: array
          items:
            $ref: '#/components/schemas/Session'
        has_more:
          type: boolean
    EventBatch:
      type: object
      required:
        - events
      properties:
        events:
          type: array
          items:
            type: object
            properties:
              type:
                type: string
                enum:
                  - user.message
                  - tool.result
                  - interrupt
              content:
                type: array
                items:
                  type: object
    Error:
      type: object
      properties:
        type:
          type: string
        error:
          type: object
          properties:
            type:
              type: string
            message:
              type: string
  responses:
    ErrorResponse:
      description: Error response.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'