---
title: "Create a constrained Agent response"
method: POST
path: "/v1/responses"
tags: ["Agent"]
---

# Create a constrained Agent response

`POST /v1/responses`

## Headers

- `Idempotency-Key` string, required
- `Last-Event-ID` string

## Request body

- CreateResponseRequest
  - `input` ResponseInputMessage[], required
    - `type` 'message', required
    - `role` 'user' | 'assistant', required
    - `content` string, required
  - `agent_session_id` string
  - `scope` Scope, required
    - `library_ids` LibraryId[], required
    - `asset_ids` AssetId[], required
  - `instructions` string, nullable
  - `workflow` WorkflowReference
    - `id` string, required
    - `version` string, required
  - `text` object
    - `format` StructuredTextFormat
      - `type` 'json_schema', required
      - `name` string, required
      - `schema` object, required
  - `execution_policy` 'local_only' | 'prefer_local' | 'cloud_allowed' | 'cloud_required', required
  - `stream` boolean, required
  - `include` string[]

## Response `200`

Completed or non-streaming response

- ResponseEnvelope
  - `request_id` string, required
  - `execution` Execution, required
    - `location` 'local' | 'cloud', required
    - `capability_id` string, nullable
    - `capability_version` string, nullable
  - `usage` Usage, required
    - `billable` boolean, required
    - `quantity` number, required
    - `unit` string, required
    - `credits` number
  - `warnings` string[], required
  - `data` Response, required
    - `response_id` string, required
    - `agent_session_id` string, required
    - `status` 'in_progress' | 'completed' | 'failed' | 'canceled', required
    - `output` ResponseOutputItem[], required
      - `type` 'message' | 'tool_summary', required
      - `content` string, required
    - `citations` Evidence[], required
      - `id` string, required
      - `asset_id` string, required
      - `kind` 'transcript' | 'frame' | 'video_clip' | 'segment', required
      - `start_seconds` number, required
      - `end_seconds` number, required
      - `quote` string, required
      - `locators` EvidenceLocator[], required
        - `type` 'local' | 'cloud', required
        - `url` string, uri, required
    - `artifacts` Artifact[], required
      - `id` string, required
      - `kind` 'clip_gallery' | 'comparison' | 'timeline' | 'highlight_reel' | 'storyboard' | 'dataset_manifest' | 'review_queue', required
      - `schema_version` string, required
      - `job_id` string
      - `response_id` string
      - `evidence_ids` EvidenceId[], required
      - `payload` object, required
      - `created_at` string, date-time, required

## Other responses

- `default` — Standard Cerul error envelope

## Changes

- **2026-07-27** `c15615d54993` — 1 info
  - endpoint added

[Change history](https://skmtc.dev/cerul-ai/apis/cerul-api/changes/v1/responses/post.md)

---

[API](https://skmtc.dev/cerul-ai/apis/cerul-api.md) · [All operations](https://skmtc.dev/cerul-ai/apis/cerul-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/cerul-ai/cerul-api/revisions/c15615d54993/schema)