Retrieve Run

get/v1/runs/{run_id}

Get the status of a run.

Path ParametersExpand Collapse

run_id: string

ReturnsExpand Collapse

Run = object { id, agent_id, background, 13 more }

Representation of a run - a conversation or processing session for an agent. Runs track when agents process messages and maintain the relationship between agents, steps, and messages.

id: string

The human-friendly ID of the Run

agent_id: string

The unique identifier of the agent associated with the run.

background: optional boolean

Whether the run was created in background mode.

base_template_id: optional string

The base template ID that the run belongs to.

callback_error: optional string

Optional error message from attempting to POST the callback endpoint.

callback_sent_at: optional string

Timestamp when the callback was last attempted.

formatdate-time

callback_status_code: optional number

HTTP status code returned by the callback endpoint.

callback_url: optional string

If set, POST to this URL when the run completes.

completed_at: optional string

The timestamp when the run was completed.

formatdate-time

created_at: optional string

The timestamp when the run was created.

formatdate-time

metadata: optional map[unknown]

Additional metadata for the run.

request_config: optional object { assistant_message_tool_kwarg, assistant_message_tool_name, include_return_message_types, use_assistant_message }

The request configuration for the run.

assistant_message_tool_kwarg: optional string

The name of the message argument in the designated message tool.

assistant_message_tool_name: optional string

The name of the designated message tool.

include_return_message_types: optional array of MessageType

Only return specified message types in the response. If None (default) returns all messages.

Accepts one of the following:

"system_message"

"user_message"

"assistant_message"

"reasoning_message"

"hidden_reasoning_message"

"tool_call_message"

"tool_return_message"

"approval_request_message"

"approval_response_message"

use_assistant_message: optional boolean

Whether the server should parse specific tool call arguments (default send_message) as AssistantMessage objects.

status: optional "created" or "running" or "completed" or 2 more

The current status of the run.

Accepts one of the following:

"created"

"running"

"completed"

"failed"

"cancelled"

stop_reason: optional StopReasonType

The reason why the run was stopped.

Accepts one of the following:

"end_turn"

"error"

"llm_api_error"

"invalid_llm_response"

"invalid_tool_call"

"max_steps"

"no_tool_call"

"tool_rule"

"cancelled"

"requires_approval"

total_duration_ns: optional number

Total run duration in nanoseconds

ttft_ns: optional number

Time to first token for a run in nanoseconds

Retrieve Run

curl https://api.letta.com/v1/runs/$RUN_ID \
    -H "Authorization: Bearer $LETTA_API_KEY"

{
  "id": "run-123e4567-e89b-12d3-a456-426614174000",
  "agent_id": "agent_id",
  "background": true,
  "base_template_id": "base_template_id",
  "callback_error": "callback_error",
  "callback_sent_at": "2019-12-27T18:11:19.117Z",
  "callback_status_code": 0,
  "callback_url": "callback_url",
  "completed_at": "2019-12-27T18:11:19.117Z",
  "created_at": "2019-12-27T18:11:19.117Z",
  "metadata": {
    "foo": "bar"
  },
  "request_config": {
    "assistant_message_tool_kwarg": "assistant_message_tool_kwarg",
    "assistant_message_tool_name": "assistant_message_tool_name",
    "include_return_message_types": [
      "system_message"
    ],
    "use_assistant_message": true
  },
  "status": "created",
  "stop_reason": "end_turn",
  "total_duration_ns": 0,
  "ttft_ns": 0
}

Returns Examples

{
  "id": "run-123e4567-e89b-12d3-a456-426614174000",
  "agent_id": "agent_id",
  "background": true,
  "base_template_id": "base_template_id",
  "callback_error": "callback_error",
  "callback_sent_at": "2019-12-27T18:11:19.117Z",
  "callback_status_code": 0,
  "callback_url": "callback_url",
  "completed_at": "2019-12-27T18:11:19.117Z",
  "created_at": "2019-12-27T18:11:19.117Z",
  "metadata": {
    "foo": "bar"
  },
  "request_config": {
    "assistant_message_tool_kwarg": "assistant_message_tool_kwarg",
    "assistant_message_tool_name": "assistant_message_tool_name",
    "include_return_message_types": [
      "system_message"
    ],
    "use_assistant_message": true
  },
  "status": "created",
  "stop_reason": "end_turn",
  "total_duration_ns": 0,
  "ttft_ns": 0
}