Stop a runtime session

POST /api/v1/projects/{id}/workspaces/{workspace_id}/runtime-sessions/{session_id}/stop
Bearer auth

Starts releasing the agent and tool sandbox capacity reserved for a runtime session, then returns immediately with status stopping. This does not delete the conversation session, messages, or execution records. Repeating the request while release is in progress returns the same accepted state without starting another release. Returns 404 when the workspace has no reserved or releasing runtime for the session. Retry-After suggests when to list runtime sessions again. Release continues in the background.

Path parameters

  • id string Required

    Project ID

  • workspace_id string Required

    Workspace ID

  • session_id string Required

    Runtime session ID

Responses

  • 406

    Unsupported or malformed API version, an operation unavailable in the selected published contract, or an unacceptable representation (including unsupported media-type parameters or excluded SSE). Existing authentication, authorization, and rate-limit failures take precedence.

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    • badRequestDetail object

      Optional validation details defined by the standard error schema; API negotiation errors do not emit this field.

      Hide badRequestDetail attribute Show badRequestDetail attribute object
      • fields array[object]

        Fields with validation failures.

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        A field and its validation failure.

        • description string Required

          Human-readable validation failure.

        • field string Required

          Name or path of the invalid request field.

    • detail string Required

      Human-readable error details.

    • error integer Required

      HTTP status code.

    • errorCode string Required

      Machine-readable error code.

    • parameters array[string]

      Request parameter names associated with the error; omitted when none apply.

    • reason string Required

      HTTP status reason phrase.

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    • badRequestDetail object

      Optional validation details defined by the standard error schema; API negotiation errors do not emit this field.

      Hide badRequestDetail attribute Show badRequestDetail attribute object
      • fields array[object]

        Fields with validation failures.

        Hide fields attributes Show fields attributes object

        A field and its validation failure.

        • description string Required

          Human-readable validation failure.

        • field string Required

          Name or path of the invalid request field.

    • detail string Required

      Human-readable error details.

    • error integer Required

      HTTP status code.

    • errorCode string Required

      Machine-readable error code.

    • parameters array[string]

      Request parameter names associated with the error; omitted when none apply.

    • reason string Required

      HTTP status reason phrase.
  • 202

    Accepted

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    • Retry-After string

      Seconds to wait before polling the runtime-session list

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    • session_id string
    • status string
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    • session_id string
    • status string
  • 400

    Bad Request

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    • code string
    • error string
    • success boolean
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    • code string
    • error string
    • success boolean
  • 401

    Unauthorized

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    • code string
    • error string
    • success boolean
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    • code string
    • error string
    • success boolean
  • 403

    Forbidden

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    • code string
    • error string
    • success boolean
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    • code string
    • error string
    • success boolean
  • 404

    Not Found

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    • code string
    • error string
    • success boolean
    Hide response attributes Show response attributes object
    • code string
    • error string
    • success boolean
  • 425

    Workspace orchestration engine is not ready

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    • code string
    • error string
    • success boolean
    Hide response attributes Show response attributes object
    • code string
    • error string
    • success boolean
  • 500

    Internal Server Error

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    • code string
    • error string
    • success boolean
    Hide response attributes Show response attributes object
    • code string
    • error string
    • success boolean
  • 502

    Bad Gateway

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    • code string
    • error string
    • success boolean
    Hide response attributes Show response attributes object
    • code string
    • error string
    • success boolean
POST /api/v1/projects/{id}/workspaces/{workspace_id}/runtime-sessions/{session_id}/stop 
curl \
 --request POST 'https://agentengine.mongodb.com/api/v1/projects/{id}/workspaces/{workspace_id}/runtime-sessions/{session_id}/stop' \
 --header "Authorization: $API_KEY"
Response examples (406) 
{
  "detail": "This operation is not available in API version 2026-09-20-preview.",
  "error": 406,
  "errorCode": "OPERATION_NOT_IN_API_VERSION",
  "parameters": [
    "Accept"
  ],
  "reason": "Not Acceptable"
}
{
  "detail": "This operation supports text/event-stream, which the Accept header excludes. Remove unsupported media-type parameters or accept this type with a positive q value.",
  "error": 406,
  "errorCode": "UNACCEPTABLE_MEDIA_TYPE",
  "parameters": [
    "Accept"
  ],
  "reason": "Not Acceptable"
}
{
  "detail": "The requested API version is not supported. Supported versions: 2026-09-20-preview.",
  "error": 406,
  "errorCode": "UNSUPPORTED_API_VERSION",
  "parameters": [
    "Accept"
  ],
  "reason": "Not Acceptable"
}
Response examples (406) 
{
  "detail": "This operation is not available in API version 2026-09-20-preview.",
  "error": 406,
  "errorCode": "OPERATION_NOT_IN_API_VERSION",
  "parameters": [
    "Accept"
  ],
  "reason": "Not Acceptable"
}
Response examples (202) 
# Headers
Retry-After: string

# Payload
{
  "session_id": "string",
  "status": "string"
}
Response examples (202) 
# Headers
Retry-After: string

# Payload
{
  "session_id": "string",
  "status": "string"
}
Response examples (400) 
{
  "code": "string",
  "error": "string",
  "success": true
}
Response examples (400) 
{
  "code": "string",
  "error": "string",
  "success": true
}
Response examples (401) 
{
  "code": "string",
  "error": "string",
  "success": true
}
Response examples (401) 
{
  "code": "string",
  "error": "string",
  "success": true
}
Response examples (403) 
{
  "code": "string",
  "error": "string",
  "success": true
}
Response examples (403) 
{
  "code": "string",
  "error": "string",
  "success": true
}
Response examples (404) 
{
  "code": "string",
  "error": "string",
  "success": true
}
Response examples (404) 
{
  "code": "string",
  "error": "string",
  "success": true
}
Response examples (425) 
{
  "code": "string",
  "error": "string",
  "success": true
}
Response examples (425) 
{
  "code": "string",
  "error": "string",
  "success": true
}
Response examples (500) 
{
  "code": "string",
  "error": "string",
  "success": true
}
Response examples (500) 
{
  "code": "string",
  "error": "string",
  "success": true
}
Response examples (502) 
{
  "code": "string",
  "error": "string",
  "success": true
}
Response examples (502) 
{
  "code": "string",
  "error": "string",
  "success": true
}