The Message object

Listing a thread returns messages in sequence. Posting a message does not return the assistant reply — it returns 202 and a run. Accepted:

{
  "run_id": "7c9e6679-7425-40de-944b-e07fc1f90ae7",
  "thread_id": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
  "state": "running"
}

Listed:

{
  "id": "9b1deb4d-3b7d-4bad-9bdd-2b0d7b3dcb6d",
  "role": "user",
  "content": "Send 50 USDC to Jane",
  "run_id": "7c9e6679-7425-40de-944b-e07fc1f90ae7",
  "seq": 1,
  "created_at": "2026-08-16T11:58:01Z"
}

If a run on the thread is awaiting_input, the next POST is the answer and the run resumes. Otherwise a new run starts.

Attributes

uuid

Unique identifier for the message. Present on list, not on the 202.

enum

user, assistant, or system.

string

Message text.

uuid

Run that produced or accepted this message.

integer

Position on the thread.

timestamp

When the message was written.

uuid

Thread the run belongs to. Present on the 202.

enum

Run state at accept time. See The Run object.

Endpoints

Send a message — POST /v1/loom/threads/:thread_id/messages
List messages — GET /v1/loom/threads/:thread_id/messages

⌘I

Core

Identify

Loom

Coming soon

Identify

Loom

The Message object

Attributes

Endpoints

​Attributes

​Endpoints

Attributes

Endpoints