---
title: "Build a pinned source revision as a frame or video"
method: POST
path: "/projects/{projectId}/source/builds"
tags: ["Creative Source"]
---

# Build a pinned source revision as a frame or video

`POST /projects/{projectId}/source/builds`

## Request

- Base URL: `https://blitzreels.com/api/v1`
- URL: `https://blitzreels.com/api/v1/projects/{projectId}/source/builds`
- Auth: API key in header `Authorization`

Requires Idempotency-Key and an enabled workspace. Reserves the configured full execution quote under shared USD caps. quoteId locks a prior quote; null accepts current configured bounds. Identical retries recover the same operation.

## Path parameters

- `projectId` string, uuid, required

## Headers

- `Idempotency-Key` string, required

## Request body

- object
  - `revision` integer, required
  - `compositionId` string, required
  - `frame` integer, required
  - `output` 'frame' | 'video' | 'alpha-video'
  - `quoteId` string, nullable

## Response `200`

Successful response

- object
  - `id` string, uuid, required
  - `projectId` string, uuid, required
  - `revision` integer, required
  - `status` 'queued' | 'processing' | 'complete' | 'failed' | 'canceled', required
  - `artifactId` string, uuid, nullable, required
  - `frameUrl` string, nullable, required
  - `mediaAssetId` string, uuid, nullable, required
  - `videoUrl` string, nullable, required
  - `logs` string, required
  - `error` string, nullable, required
  - `runtime` string, required
  - `reservedUsd` number, required
  - `computeUpperBoundUsd` number, nullable, required
  - `elapsedMs` number, nullable, required
  - `createdAt` string, required
  - `receiptUrl` string, required

## Other responses

- `400`: Invalid input data
- `401`: Authorization not provided
- `403`: Insufficient access
- `500`: Internal server error

---

[API](https://skmtc.dev/blitzreels/apis/blitzreels-api.md) · [All operations](https://skmtc.dev/blitzreels/apis/blitzreels-api/llms.txt) · [OpenAPI document](https://skmtc.dev/blitzreels/apis/blitzreels-api/revisions/35608b12471d?raw)