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.

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

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

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

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