Get Session Thread Item - BlobHub

Fetch a single thread item by id.

POST `/revisions/:id/data/query` (Command: `get_session_thread_item`)

Request Body

Parameter	Type	Required	Description
`engine`	string	Yes	Must be `workflow_blobhub`.
`command`	string	Yes	Must be `get_session_thread_item`.
`session_id`	string	Yes	The ID of the session.
`alias`	string	Yes	Alias of the thread session object.
`item_id`	string	Yes	The item id returned by `post_session_thread_item`.

Response

Parameter	Type	Description
`item`	object	The retrieved thread item.

Errors

not_found — the item does not exist, or its stored session_id/alias/revision_id does not match the request.

Example

{
  "engine": "workflow_blobhub",
  "command": "get_session_thread_item",
  "session_id": "sess_001",
  "alias": "onboarding_thread",
  "item_id": "itm_01H..."
}

{
  "status": "success",
  "item": {
    "id": "itm_01H...",
    "session_id": "sess_001",
    "revision_id": "rev_001",
    "alias": "onboarding_thread",
    "created_at": "2026-05-22T22:00:00.000000Z",
    "user_id": "usr_001",
    "content": [{ "type": "text", "text": "Hello, world." }]
  }
}

See also

BlobHub Worker — thread items — content/metadata shape and metadata.type values used by the worker.