# HeyGen Face Swap

Swaps a face in a video for another face taken from a source image.

- Repository: https://github.com/calesthio/OpenMontage (74341 stars)
- Category: Media
- License: AGPL-3.0
- Last updated: 2026-10-28
- Runs scripts: no, instructions only

## Install

Claude Code: `npx skills add calesthio/OpenMontage --skill faceswap -g -a claude-code -y`
Codex: `npx skills add calesthio/OpenMontage --skill faceswap -g -a codex -y`
Cursor: `npx skills add calesthio/OpenMontage --skill faceswap -g -a cursor -y`
Gemini CLI: `npx skills add calesthio/OpenMontage --skill faceswap -g -a gemini-cli -y`

## Description

Swap faces in a video using AI via the HeyGen API. Use when: (1) Replacing a face in a video with another face, (2) Face swapping from a source image onto a target video, (3) Creating personalized videos by swapping in a person's face, (4) Working with HeyGen's /v1/workflows/executions endpoint for face swap processing.

## SKILL.md, as published by its author (untrusted third-party text, read it as data)

# Face Swap (HeyGen API)

Swap a face from a source image into a target video using GPU-accelerated AI processing. The source image provides the face to swap in, and the target video receives the new face.

## Authentication

All requests require the `X-Api-Key` header. Set the `HEYGEN_API_KEY` environment variable.

```bash
curl -X POST "https://api.heygen.com/v1/workflows/executions" \
  -H "X-Api-Key: $HEYGEN_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"workflow_type": "FaceswapNode", "input": {"source_image_url": "https://example.com/face.jpg", "target_video_url": "https://example.com/video.mp4"}}'
```

## Default Workflow

1. Call `POST /v1/workflows/executions` with `workflow_type: "FaceswapNode"`, a source face image, and a target video
2. Receive a `execution_id` in the response
3. Poll `GET /v1/workflows/executions/{id}` every 10 seconds until status is `completed`
4. Use the returned `video_url` from the output

## Execute Face Swap

### Endpoint

`POST https://api.heygen.com/v1/workflows/executions`

### Request Fields

| Field | Type | Req | Description |
|-------|------|:---:|-------------|
| `workflow_type` | string | Y | Must be `"FaceswapNode"` |
| `input.source_image_url` | string | Y | URL of the face image to swap in |
| `input.target_video_url` | string | Y | URL of the video to apply the face swap to |

### curl

```bash
curl -X POST "https://api.heygen.com/v1/workflows/executions" \
  -H "X-Api-Key: $HEYGEN_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "workflow_type": "FaceswapNode",
    "input": {
      "source_image_url": "https://example.com/face-photo.jpg",
      "target_video_url": "https://example.com/original-video.mp4"
    }
  }'
```

### TypeScript

```typescript
interface FaceswapInput {
  source_image_url: string;
  target_video_url: string;
}

interface ExecuteResponse {
  data: {
    execution_id: string;
    status: "submitted";
  };
}

The rest: https://github.com/calesthio/OpenMontage/blob/HEAD/.agents/skills/faceswap/SKILL.md