heygen-mcp

heygen-mcp

Exposes HeyGen's video generation API to MCP-compatible clients, enabling listing avatars, generating videos, and checking render status.

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README

Cinder Haus — HeyGen MCP

A Model Context Protocol server that exposes HeyGen's video generation API to MCP-compatible clients (Claude desktop, Cursor, etc.). Built as a case study for Forging Your Own Knight.

Tools

  • list_avatars — list available avatars and talking photos
  • generate_video — render a video from script + avatar_id; sensible defaults (avatar's default voice, solid white background, 1920×1080)
  • get_video_status — check render progress; returns the video URL when complete

Local dev

  1. npm install
  2. Open .env.local and paste your HeyGen API key after HEYGEN_API_KEY=
  3. npm run dev — server runs at http://localhost:3000/api/mcp
  4. npm run inspector — opens the MCP Inspector to test tools interactively

Deploy to Vercel

  1. Push this repo to GitHub
  2. In the Vercel dashboard: New Project → import the GitHub repo
  3. Add HEYGEN_API_KEY under Settings → Environment Variables (Production + Preview)
  4. Deploy. Your MCP URL is https://<your-project>.vercel.app/api/mcp

Register in Claude desktop

Settings → Connectors → Add custom connector → paste the deployed URL.

Stack

  • Next.js 15 (App Router)
  • mcp-handler for Streamable HTTP MCP transport
  • TypeScript, Zod for input validation

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