Give ChatGPT Desktop Custom MCP Tools from Your Browser

Prerequisites

• ChatGPT Desktop — openai.com/chatgpt/download (macOS and Windows, requires ChatGPT Plus or above)
• Node.js 18+
• Agent MCP Studio at agentmcp.studio

Step-by-Step Setup

1. Get your relay URL and download bridge.js

   Open the studio → Settings → MCP Relay Bridge. Copy your session URL, click Connect, then:

   curl -O https://agentmcp.studio/bridge.js && npm install ws

2. Open ChatGPT Desktop settings

   In ChatGPT Desktop, go to Settings → Developer → Model Context Protocol. Click Edit config or navigate to the config file directly:

   • macOS: ~/Library/Application Support/ChatGPT/claude_desktop_config.json
   • Windows: %APPDATA%\ChatGPT\claude_desktop_config.json

3. Add the MCP server config

   {
     "mcpServers": {
       "agent-mcp-studio": {
         "command": "node",
         "args": [
           "/absolute/path/to/bridge.js",
           "wss://agentmcp.studio/api/relay/YOUR-SESSION-UUID"
         ]
       }
     }
   }

4. Restart ChatGPT Desktop

   Quit and reopen the app. ChatGPT will launch bridge.js automatically. Look for the tools/plug icon in the chat interface confirming MCP is connected. The studio bridge chip will show 🟢 Live.

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