mcpreflight for Claude Desktop

io.github.xka0085-byte/mcpreflight

Read-only preflight for any MCP or x402 endpoint: handshake, tool schemas, 402 drift.

client:Claude Desktop transport:stdio runtime:npm

Install mcpreflight in Claude Desktop

~/Library/Application Support/Claude/claude_desktop_config.json · windows: %APPDATA%\Claude\claude_desktop_config.json

{
  "mcpServers": {
    "mcpreflight": {
      "command": "npx",
      "args": [
        "-y",
        "@eidonze/mcpreflight"
      ]
    }
  }
}

Settings → Developer → Edit Config opens this file. Restart the app after saving. Claude Desktop docs