Claude Desktop unable to launch MCP server

[Will956]

Checklist

• I have looked into the Readme, Examples, and FAQ and have not found a suitable solution or answer.
• I have looked into the API documentation and have not found a suitable solution or answer.
• I have searched the issues and have not found a suitable solution or answer.
• I have searched the Auth0 Community forums and have not found a suitable solution or answer.
• I agree to the terms within the Auth0 Code of Conduct.

Description

Hello,

I tried to set up the server and use it with Claude Desktop App, but Claude doesn't succeed in launching the server. Here are the logs

2025-05-06T12:03:13.117Z [auth0] [info] Initializing server...
2025-05-06T12:03:13.132Z [auth0] [info] Server started and connected successfully
2025-05-06T12:03:13.133Z [auth0] [info] Message from client: {"method":"initialize","params":{"protocolVersion":"2024-11-05","capabilities":{},"clientInfo":{"name":"claude-ai","version":"0.1.0"}},"jsonrpc":"2.0","id":0}
npx: installed 4 in 1.132s
Unexpected token '('
2025-05-06T12:03:16.879Z [auth0] [info] Server transport closed
2025-05-06T12:03:16.879Z [auth0] [info] Client transport closed
2025-05-06T12:03:16.880Z [auth0] [info] Server transport closed unexpectedly, this is likely due to the process exiting early. If you are developing this MCP server you can add output to stderr (i.e. `console.error('...')` in JavaScript, `print('...', file=sys.stderr)` in python) and it will appear in this log.
2025-05-06T12:03:16.880Z [auth0] [error] Server disconnected. For troubleshooting guidance, please visit our [debugging documentation](https://modelcontextprotocol.io/docs/tools/debugging) {"context":"connection"}
2025-05-06T12:03:16.880Z [auth0] [info] Client transport closed

It looks like the npx: installed 4 in 1.132s line breaks it.

When I run npx @auth0/auth0-mcp-server run --tools '*' separately, there is no issue since the npx installation line is not present.

Thanks for you help 🙌

Reproduction

1. Run npx @auth0/auth0-mcp-server init
2. Re-launch Claude
3. Not working

Additional context

No response

auth0-mcp-server version

0.1.0-beta.2

Node.js version

22.14.0

[gyaneshgouraw-okta]

Hey @Will956, thanks for flagging this! We'll take a look and get back to you with an update soon.

[Will956]

Just so you know, I was able to make it work by explicitly telling the path of the JavaScript file.

{
  "servers": {
    "auth0": {
      "command": "/Users/name/.nvm/versions/node/v22.14.0/bin/node",
      "args": [
        "/Users/name/.nvm/versions/node/v22.14.0/lib/node_modules/@auth0/auth0-mcp-server/dist/index.js",
        "run",
        "--tools",
        "*"
      ],
      "env": {
        "DEBUG": "auth0-mcp"
      }
    }
  }
}