> For the complete documentation index, see [llms.txt](https://bountyv.gitbook.io/vdocs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://bountyv.gitbook.io/vdocs/clip-api/clip-overview.md).

# Overview

Watermark-free downloads, scene-cut splitting, and hook + Vault stitching for TikTok and Instagram Reels — one product surface, gated by your account's `clip` entitlement. Calls return `403 product_disabled` if the entitlement is missing.

| Endpoint                                      | Method                     | Description                                                                                                                                         |
| --------------------------------------------- | -------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------- |
| [Clean Clip](/vdocs/clip-api/clip-clean.md)   | `POST /api/v1/clip/clean`  | Re-download a Reel without the platform's watermark overlay. Sync, streams the MP4 back.                                                            |
| [Clip Split](/vdocs/clip-api/clip-split.md)   | `POST /api/v1/clip/split`  | Split a Reel at its dominant scene cut; returns start + end sections as a ZIP. Sync.                                                                |
| [Clip Stitch](/vdocs/clip-api/clip-stitch.md) | `POST /api/v1/clip/stitch` | Upload a hook and (optionally) your own audio track, pick an end from our Vault library, get a finished 1080×1920 reel. Async — returns a `job_id`. |
| [Clip Library](#clip-library)                 | `GET /api/v1/clip/library` | List the Vault end clips and audio tracks available to Clip Stitch. Free.                                                                           |

## Billing at a glance

* **Clean Clip** and **Clip Split** are flat per-call charges.
* **Clip Stitch** is a flat charge, applied on successful dispatch.
* **Clip Library** is free — call it as often as you like.

Failed calls are always refunded. See [Credits & pricing](/vdocs/account/credits.md) for current rates.

## Clip Library

`GET /api/v1/clip/library` lists the shared Vault assets you can pick from when building a [Clip Stitch](/vdocs/clip-api/clip-stitch.md) request — not your own uploads. It returns two arrays:

* `ends` — Vault videos in the `virals` category, each with an `id`, `title`, `thumbnail_url`, `preview_url`, `duration_seconds`, and `tags`.
* `audio` — Vault audio tracks, each with an `id`, `title`, `duration_seconds`, and `tags`.

Pass the `id` values you want straight through as `end_id` / `audio_id` on `POST /api/v1/clip/stitch`. Calling this endpoint is free and requires no `Content-Type` or body — just the `Authorization` header.

You don't have to use a Vault track: `POST /api/v1/clip/stitch` also accepts an `audio` file upload, which takes precedence over `audio_id`. That's the recommended path — you choose the exact track and you're responsible for holding the rights to it.

```bash
curl https://substance-api.com/api/v1/clip/library \
  -H "Authorization: Bearer sk_live_..."
```

```json
{
  "ends": [
    {
      "id": "8f3c1a2e-...",
      "title": "Gym PR hype",
      "thumbnail_url": "https://…",
      "preview_url": "https://…",
      "duration_seconds": 6.2,
      "tags": ["gym", "hype"]
    }
  ],
  "audio": [
    { "id": "b71e9d0a-...", "title": "Suspense riser", "duration_seconds": 4.0, "tags": ["suspense"] }
  ]
}
```

Same product gate as the rest of Clip Tools (`403` if `clip` isn't enabled on your account).

## Async pipelines

Clip Stitch is asynchronous: the submit call returns a `job_id` immediately, and you poll a separate endpoint until the render finishes.

* **Clip Stitch** returns a `job_id` — poll it like any other video job via [Job status](/vdocs/video-api/jobs.md), then download the finished reel from `/api/v1/jobs/{id}/video`.

Clean Clip and Clip Split are synchronous — the file streams back directly in the response body of the original call.

## Authentication

All Clip Tools endpoints use the standard header:

```
Authorization: Bearer sk_live_...
```

See [Authentication](/vdocs/authentication.md) for details.

## Want a custom flow?

If you have a use case beyond these — bulk splitting, custom transitions, or a private end library — reach out via your account manager. Early-access slots come with the same pooled-credit billing as the rest of the API.


---

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