Levain LabsLevain Labs
API ReferenceAgents

Build Version

Launch a build against an agent version.

The prompt describes the change the build should make. Returns a run_id the caller can poll or send follow-up messages to. Only DRAFT versions can be built; published versions are immutable — fork a new draft via POST /versions with parent_version first.

POST
/api/v1/agents/{agent_id}/versions/{version}/build

Authorization

HTTPBearer
AuthorizationBearer <token>

In: header

Path Parameters

agent_id*Agent Id
version*Version

Header Parameters

X-API-Key?string|null

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/agents/string/versions/0/build" \  -H "Content-Type: application/json" \  -d '{    "prompt": "string"  }'
{
  "run_id": "string",
  "session_id": "string",
  "agent_id": "string",
  "version": 0,
  "status": "string",
  "created_at": "string"
}
{
  "detail": [
    {
      "loc": [
        "string"
      ],
      "msg": "string",
      "type": "string",
      "input": null,
      "ctx": {}
    }
  ]
}