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HeyGen MCP Integration for LangChain

Connect HeyGen to LangChain through the local KosmoKrator MCP gateway with scoped tools, credentials, and write policy.

7 functions 6 read 1 write Bearer token auth
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Connect HeyGen to LangChain

Bridge LangChain agents to local KosmoKrator integration tools through MCP or headless CLI calls.

Use the MCP gateway when the agent should discover tools, or wrap kosmo integrations:call for fixed chains. The gateway is local, scoped to this integration, and starts with --write=deny so LangChain can inspect read-capable tools without receiving write access by default.

HeyGen MCP Config for LangChain

Keep the gateway scoped to the integration and operation class needed by the chain.

{
  "mcpServers": {
    "kosmokrator-heygen": {
      "type": "stdio",
      "command": "kosmo",
      "args": [
        "mcp:serve",
        "--integration=heygen",
        "--write=deny"
      ]
    }
  }
}

Run the Gateway Manually

kosmokrator mcp:serve --integration=heygen --write=deny

Why Use KosmoKrator Here

Scoped tools

Expose only HeyGen instead of a broad multi-service tool list.

Local credentials

Reuse credentials already configured for the KosmoKrator CLI and Lua runtime.

Write policy

Start read-only, then opt into ask or allow for trusted workspaces.

HeyGen Tools Visible to LangChain

LangChain sees stable MCP tool names generated from the HeyGen integration catalog.

MCP toolSource functionTypeDescription
integration__heygen__heygen_list_videos heygen.heygen_list_videos Read List generated videos from HeyGen. Returns video IDs, statuses, and metadata. Use limit and offset for pagination.
integration__heygen__heygen_get_video heygen.heygen_get_video Read Get the status and details of a specific HeyGen video. Returns the video status (pending, processing, completed, failed), download URL when ready, and metadata.
integration__heygen__heygen_create_video heygen.heygen_create_video Write Generate a new AI video on HeyGen. Provide video_inputs defining scenes (avatar, voice, script), optional dimensions, and test mode. Returns a video_id to track generation progress.
integration__heygen__heygen_list_avatars heygen.heygen_list_avatars Read List all available talking avatars from HeyGen. Returns avatar IDs, names, preview images, and supported styles. Use avatar IDs when creating videos.
integration__heygen__heygen_list_voices heygen.heygen_list_voices Read List all available voices from HeyGen. Returns voice IDs, display names, supported languages, gender, and preview audio URLs. Use voice IDs when creating videos.
integration__heygen__heygen_get_current_user heygen.heygen_get_current_user Read Get the current authenticated HeyGen user's account information, including plan details, remaining credits, and usage statistics.
integration__heygen__heygen_list_templates heygen.heygen_list_templates Read List available video templates from HeyGen. Returns template IDs, names, thumbnails, and metadata. Use limit and offset for pagination.

Related HeyGen Pages

HeyGen CLIUse direct JSON commands instead of MCP discovery. HeyGen MCPFull gateway reference and MCP tool names. KosmoKrator for LangChainClient-level gateway setup.