api-reference

Blender MCP JSON Protocol Format: Complete Guide to Commands and Responses

April 13, 2026 ahujasid/blender-mcp ↗

Blender MCP uses a lightweight JSON protocol where clients send {"type": "command_name", "params": {...}} requests and receive {"status": "success"|"error", "result": {...}} or {"status": "error", "message": "..."} responses over TCP sockets.

The JSON protocol format used by Blender MCP enables seamless communication between the Python MCP server running inside the Blender add-on and external clients such as the BlenderConnection class. This bidirectional message exchange allows external tools to query scene information, manipulate objects

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