internals

How TCP Socket Communication Works Between the Blender MCP Server and Blender Addon

April 13, 2026 ahujasid/blender-mcp ↗

The Blender MCP integration establishes a persistent TCP socket where the Blender addon acts as a server listening on localhost:9876, while the MCP server acts as a client that sends JSON-encoded commands and receives JSON responses, enabling LLM-driven tools to execute Blender commands remotely.

The blender-mcp project bridges large language models with Blender by implementing a bidirectional TCP socket connection between the MCP server and a Blender addon. This architecture allows external AI agents to query and manipulate Blender scenes without running inside the Blender process itself, using a simple request-response protocol over a local network

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Add to your MCP client configuration:

{
  "mcpServers": {
    "instagit": {
      "command": "npx",
      "args": ["-y", "instagit@latest"]
    }
  }
}

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