Levain LabsLevain Labs
API ReferenceRuns

Send Message

Iterate on a prior run by sending a follow-up prompt.

A new Run is created, inheriting the previous run's agent, version, and repo ref. The new prompt enters the graph as plan_text (build recipe) so the builder treats it as the next task to apply on top of what the previous run already committed. Lineage is recorded in config.parent_run_id.

POST
/api/v1/runs/{run_id}/messages

Authorization

HTTPBearer
AuthorizationBearer <token>

In: header

Path Parameters

run_id*string
Formatuuid

Header Parameters

X-API-Key?|

Request Body

application/json

TypeScript Definitions

Use the request body type in TypeScript.

Response Body

application/json

application/json

curl -X POST "https://api.levainlabs.com/api/v1/runs/497f6eca-6276-4993-bfeb-53cbbbba6f08/messages" \  -H "Content-Type: application/json" \  -d '{    "prompt": "string"  }'
{
  "id": "string",
  "recipe": "string",
  "status": "string",
  "config": {},
  "cost_usd": 0,
  "tokens_in": 0,
  "tokens_out": 0,
  "started_at": "string",
  "finished_at": "string",
  "error": "string",
  "agent_id": "string",
  "agent_version_id": "string",
  "parent_run_id": "string",
  "created_at": "string"
}
{
  "detail": [
    {
      "loc": [
        "string"
      ],
      "msg": "string",
      "type": "string"
    }
  ]
}