---
title: "Extend a clip via scene extension"
method: POST
path: "/api/longform-video/extend-clip"
tags: ["Manual Mode"]
---

# Extend a clip via scene extension

`POST /api/longform-video/extend-clip`

## Request

- Base URL: `https://app.addshuffle.com`
- URL: `https://app.addshuffle.com/api/longform-video/extend-clip`
- Auth: HTTP bearer

Generates a scene extension from an existing clip (requires Veo 3.1). The extension is inserted after the source clip.

## Request body

- object
  - `chainId` string, required
  - `stepNumber` integer, required
  - `prompt` string, required

## Response `200`

Extension initiated

- object
  - `success` boolean
  - `stepId` string
  - `stepNumber` integer

---

[API](https://skmtc.dev/addshuffle/apis/farcash-longform-video-api.md) · [All operations](https://skmtc.dev/addshuffle/apis/farcash-longform-video-api/llms.txt) · [OpenAPI document](https://skmtc.dev/addshuffle/apis/farcash-longform-video-api/revisions/f0a14318fdf9?raw)