[BUG] The Fetch tool of Claude Code does not identify properly but uses a generic UA

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

Hey, all!

The Fetch tool of Claude Code identifies as axios/1.8.4.

What Should Happen?

I think the tool should identify with something like this:

Claude Code Fetch (assistant; +https://example.com/some-page/)

Error Messages/Logs

Steps to Reproduce

Visit a website whose logs you have access to. Look at the web server logs for the visit.

Claude Model

Opus

Is this a regression?

No, this never worked

Last Working Version

_No response_

Claude Code Version

1.0.113 (Claude Code)

Platform

Anthropic API

Operating System

Ubuntu/Debian Linux

Terminal/Shell

WSL (Windows Subsystem for Linux)

Additional Information

_No response_