Results & Webhooks

You have two ways to learn that a workflow finished: poll GetWorkflow until it reaches a terminal state, or register callbacks (webhooks) on the workflow and let the orchestrator push events to you.

For anything longer than the 100-second request timeout — most video jobs, training, large batches — webhooks are strongly preferred over polling.

Registering callbacks

Callbacks live on the workflow body you submit via SubmitWorkflow, alongside steps:

POST https://orchestration.civitai.com/v2/consumer/workflows
Authorization: Bearer <your-token>
Content-Type: application/json

{
  "steps": [
    {
      "$type": "videoGen",
      "input": { "engine": "wan", "version": "v2.6", "operation": "text-to-video",
                 "prompt": "...", "resolution": "1080p", "duration": 10 }
    }
  ],
  "callbacks": [
    {
      "url": "https://your-service.example.com/civitai-hooks",
      "type": ["workflow:succeeded", "workflow:failed"],
      "detailed": true
    }
  ]
}

Each entry in callbacks (see the WorkflowCallback schema) has:

Field	Required	Notes
url	✅	HTTPS endpoint that will receive POSTed events.
type	✅	Array of event types to subscribe to (see below).
detailed		If true, the payload includes the full workflow / step output (blobs, timings). Defaults to false — you'd then call GetWorkflow to fetch details.

You can register multiple callbacks per workflow (different URLs, different event filters).

Event types

Event types use a <scope>:<status> format. Scopes fan out at decreasing granularity:

Scope	Fires on	Typical use
workflow:*	Workflow-level transitions	What you usually want — one event when the whole workflow resolves.
step:*	Each step transition	Multi-step workflows where you want intermediate output.
job:*	Each internal job transition	Debugging / observability — usually too noisy for production.

Statuses you can filter on: unassigned, processing, succeeded, failed, expired, canceled. Use * to receive every status for a scope.

Common subscriptions:

• "Tell me when it's done, pass or fail" → ["workflow:succeeded", "workflow:failed", "workflow:expired", "workflow:canceled"]
• "Everything about the workflow" → ["workflow:*"]
• "Per-step progress in a multi-step pipeline" → ["step:succeeded", "step:failed"]

Event payload

The orchestrator POSTs a JSON body to your url. For workflow-scoped events:

{
  "$type": "workflow",
  "workflowId": "wf_01HXYZ...",
  "status": "succeeded",
  "timestamp": "2026-04-12T23:00:00Z",
  "details": {
    "createdAt": "2026-04-12T22:58:12Z",
    "startedAt": "2026-04-12T22:58:14Z",
    "completedAt": "2026-04-12T23:00:00Z",
    "steps": [
      { "name": "0", "status": "succeeded", "output": { "blobs": [ /* ... */ ] } }
    ]
  }
}

details is only present when the callback was registered with detailed: true. Without it, you get the transition notification (id + status + timestamp) and fetch the workflow yourself.

Step events use WorkflowStepEvent (workflowId + name + status + optional details), and job events use WorkflowStepJobEvent (adds jobId, progress, reason). Inspect $type to route them.

Delivery semantics

• In-order, serialized per workflow. The orchestrator waits for each callback invocation to complete before sending the next one, so processing always arrives before succeeded for a given workflow / step.
• Terminal states are terminal. Once a workflow or step reaches succeeded, failed, expired, or canceled, it will not transition back to processing or any other state.
• processing can repeat. You may get multiple processing events for the same workflow or step — each one signals progress. If you need the latest details (e.g. partial output), call GetWorkflow in response.
• Automatic retries on transient errors. If your endpoint returns a non-2xx or times out, the orchestrator retries before advancing to the next event.

Receiving endpoint checklist

• Return 2xx quickly. Do the real work on a queue after acknowledging. Slow receivers delay subsequent events (delivery is serialized) and get retried.
• Be idempotent on processing. Retries and legitimately repeated processing events mean the same event can arrive more than once. Use (workflowId, status, timestamp) as your dedupe key, or treat processing as "latest progress, refetch if you care."
• Accept only HTTPS URLs — the orchestrator won't post to plain HTTP.

Blobs in results

Output blobs come back with signed url fields inside details.steps[].output.blobs[]. Those URLs expire — refetch the workflow (or call GetBlob) to get a fresh signed URL; don't cache the URL long-term. If you need to keep the media, download the bytes and store them yourself.

Polling fallback

If you can't expose a webhook endpoint (scripts, CLI tools, notebooks), poll GetWorkflow. Suggested cadence: 2 s, 5 s, 10 s, 15 s, then 30 s. Stop when status is one of succeeded, failed, expired, canceled.