KosmoKrator

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HeyGen MCP Integration for LangGraph

Connect HeyGen to LangGraph 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 LangGraph

Run KosmoKrator integration calls from LangGraph nodes while preserving local credentials and permissions.

Use a graph node that calls the KosmoKrator CLI for deterministic steps or an MCP client for dynamic tool selection. The gateway is local, scoped to this integration, and starts with --write=deny so LangGraph can inspect read-capable tools without receiving write access by default.

HeyGen MCP Config for LangGraph

Headless CLI calls fit repeatable graph edges; MCP fits exploratory agent nodes.

{
  "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 LangGraph

LangGraph 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 LangGraphClient-level gateway setup.