Claude Desktop

Steps

1. Install Node.js
2. Install Claude Desktop
3. Open Claude Desktop ➜ Settings (⋯) ➜ Developer ➜ “Edit Config”
4. Replace or extend claude_desktop_config.json with:

Note: MCPs only work with Claude Desktop, not the web version.

{
  "mcpServers": {
    "customgpt-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "supergateway",
        "--sse",
        "https://mcp.customgpt.ai/projects/<PROJECT_ID>/sse",
        "--header",
        "Authorization: Bearer <TOKEN>"
      ]
    }
  }
}

4. Save & restart Claude.
5. First run shows an “Allow external integration?” banner—click Allow for this chat.
6. Ask Claude anything like "What is the name of president of US, answer from your knowledgebase" related to your project info and Claude will stream the doc-grounded answer.

Note: For now, you need to add the suffix "...answer from your knowledgebase" or something similar to this for claude to identify that you are referring to get the info using MCP.

Get the token from app.customgpt.ai -> Project -> Deploy -> MCP Server.

Get more info here:

Logs location

• macOS: ~/Library/Logs/Claude/mcp-supergateway.log
• Windows: %APPDATA%\Claude\Logs\