List runtime sessions

GET /api/v1/projects/{id}/workspaces/{workspace_id}/runtime-sessions
Bearer auth

Lists runtime sessions that reserve agent or tool sandbox capacity for the workspace, including sessions still releasing capacity. Runtime sessions are separate from durable conversation sessions, which store conversation history. Status is active while the session holds capacity and stopping while release is in progress. last_activity_at and scheduled_release_at follow the workspace idle timeout. scheduled_release_at is omitted while a component is still releasing. is_test_session identifies Playground and CLI test sessions. The list is empty when no runtime capacity is reserved. An accepted stop or unconfirmed release remains visible after a restart and from every runtime replica. Concurrent list requests share one executor status refresh. A successful refresh is reused for about one second. If the two-second refresh fails or returns incomplete data, the endpoint uses the current replica's cached snapshot. last_activity_at uses the serving replica's clock.

Path parameters

  • id string Required

    Project ID

  • workspace_id string Required

    Workspace 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.

    Hide response attributes Show response attributes object
    • 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.

    Hide response attributes Show response attributes object
    • 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.
  • 200

    OK

    Hide response attribute Show response attribute object
    • sessions array[object]
      Hide sessions attributes Show sessions attributes object
      • is_test_session boolean
      • last_activity_at string
      • scheduled_release_at string
      • session_id string
      • status string
    Hide response attribute Show response attribute object
    • sessions array[object]
      Hide sessions attributes Show sessions attributes object
      • is_test_session boolean
      • last_activity_at string
      • scheduled_release_at string
      • session_id string
      • status string
  • 400

    Bad Request

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    • code string
    • error string
    • success boolean
    Hide response attributes Show response attributes object
    • code string
    • error string
    • success boolean
  • 401

    Unauthorized

    Hide response attributes Show response attributes object
    • code string
    • error string
    • success boolean
    Hide response attributes Show response attributes object
    • code string
    • error string
    • success boolean
  • 403

    Forbidden

    Hide response attributes Show response attributes object
    • code string
    • error string
    • success boolean
    Hide response attributes Show response attributes object
    • code string
    • error string
    • success boolean
  • 404

    Not Found

    Hide response attributes Show response attributes object
    • 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

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

    Internal Server Error

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

    Bad Gateway

    Hide response attributes Show response attributes object
    • code string
    • error string
    • success boolean
    Hide response attributes Show response attributes object
    • code string
    • error string
    • success boolean
GET /api/v1/projects/{id}/workspaces/{workspace_id}/runtime-sessions 
curl \
 --request GET 'https://agentengine.mongodb.com/api/v1/projects/{id}/workspaces/{workspace_id}/runtime-sessions' \
 --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 (200) 
{
  "sessions": [
    {
      "is_test_session": true,
      "last_activity_at": "string",
      "scheduled_release_at": "string",
      "session_id": "string",
      "status": "string"
    }
  ]
}
Response examples (200) 
{
  "sessions": [
    {
      "is_test_session": true,
      "last_activity_at": "string",
      "scheduled_release_at": "string",
      "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
}