[BUG] Claude Cannot Access GitHub Repository Source Code

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?

Claude on the WEB IS unable to read, clone, or fetch source code files from GitHub repositories, despite having web search, web fetch, and computer use (bash) tools available. This makes it impossible for Claude to analyse codebases when a user provides a GitHub URL.

What Should Happen?

Claude should be able to read, fetch or clone GitHub repos from the Web Version.

Error Messages/Logs

git clone via bash >Blocked — CONNECT tunnel failed, response 401


curl zip download > Blocked — CONNECT tunnel failed, response 403


web_fetch on raw.githubusercontent.com >Blocked — PERMISSIONS_ERROR: URL not provided by user nor in search results


web_fetch on github.com subdirectories > blocked — same permissions errorWeb search for indexed file contentsFails — search engines rarely index individual repo source files

Steps to Reproduce

1. Start a chat with claude via web. https://claude.ai/chat/

1.Provide Claude with a public GitHub repo URL (e.g. https://github.com/ToumaKamijou/Yugens-Terrain-Authoring-Toolkit/tree/public-testing)

2.Ask Claude to read and analyse specific source files from the repo

1. Claude attempts multiple approaches — all fail.

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

Latest version on web opus 4.6 Fri Feb 06

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Other

Additional Information

This is happening on claude main web version claude.ai