---
title: "Create a new composition (video) in a project"
method: POST
path: "/v1/projects/{id}/compositions"
tags: ["compositions"]
---

# Create a new composition (video) in a project

`POST /v1/projects/{id}/compositions`

## Request

- Base URL: `https://api.cueframe.ai`
- URL: `https://api.cueframe.ai/v1/projects/{id}/compositions`
- Auth: one of:
  - HTTP bearer
  - OAuth 2 (authorization code, authorization URL `https://api.cueframe.ai/api/auth/mcp/authorize`, token URL `https://api.cueframe.ai/api/auth/mcp/token`, scopes: `projects:write`)
  - API key in header `PAYMENT-SIGNATURE`

Required permission: projects:write

## Path parameters

- `id` string, required

## Request body

- CompositionCreateRequest: POST /projects/:id/compositions body — create a new video (composition) in the project. `format` defaults to the project's compositionFormat when omitted.
  - `name` string
  - `format` Format
    - `aspectRatio` '16:9' | '9:16' | '1:1' | '4:5', required
    - `fps` union
      - 24
      - 25
      - 30
      - 60
    - `resolution` 'hd' | 'fhd' | '4k'
    - `platform` string

## Response `201`

Composition created.

- CompositionCreateResponse: POST /projects/:id/compositions response.
  - `compositionId` string, required: The new composition's id: `composition_id` for apply_composition, `compositionId` for preview_frame and create_render.
  - `format` Format, required
    - `aspectRatio` '16:9' | '9:16' | '1:1' | '4:5', required
    - `fps` union
      - 24
      - 25
      - 30
      - 60
    - `resolution` 'hd' | 'fhd' | '4k'
    - `platform` string
  - `etag` string, required: The strong ETag of the empty composition, for If-Match on its first write.

## Other responses

- `400`: Bad request — validation_error / invalid_cursor / invalid_query.
- `401`: Missing or invalid Authorization header.
- `402`: Payment required. Returned when the caller presents no API key on a priced operation: the body AND the `Payment-Required` header carry the x402 v2 challenge (accepted scheme, network, USDC asset, amount, payTo). Sign the EIP-3009 authorization and retry with a `PAYMENT-SIGNATURE` header. A KEYED caller sees this status instead when their plan lacks or has exhausted the feature (`billing_required`).
- `403`: Forbidden — permission insufficient.
- `404`: Resource not found.
- `422`: Unprocessable — invalid_composition / media_in_use / session_in_use / render_not_cancellable.
- `429`: Rate limited. Retry-After header present.
- `500`: Internal error.

---

[API](https://skmtc.dev/cueframe/apis/cueframe-api.md) · [All operations](https://skmtc.dev/cueframe/apis/cueframe-api/llms.txt) · [OpenAPI document](https://skmtc.dev/cueframe/apis/cueframe-api/revisions/8f9bfe362b4a?raw)