[BUG] OAuth /login fails with ECONNREFUSED on Windows 11, fresh install, network confirmed OK

[IsmailMAJBAR]

Preflight Checklist

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

What's Wrong?

Title: OAuth /login fails with ECONNREFUSED on Windows 11, fresh install, network confirmed OK

Environment:

• OS: Windows 11
• Claude Code: 2.1.143 (npm-global install)
• Node.js: v24.13.1
• Claude Desktop app: same ECONNREFUSED on Claude Code tab

Steps to reproduce:

1. Fresh install via npm install -g @anthropic-ai/claude-code
2. Run claude → "Welcome back!" banner displays correctly
3. Run /login → browser opens, OAuth completes on Anthropic side
4. Callback to localhost fails with OAuth error: ECONNREFUSED

Network diagnostics (all passing):

• curl https://api.anthropic.com/ → 404 with proper Anthropic ASCII logo response
• Test-NetConnection api.anthropic.com -Port 443 → TcpTestSucceeded: True
• ping 127.0.0.1 → 0% loss
• DNS: Cloudflare + Google (IPv4 + IPv6)
• No HTTPS_PROXY / HTTP_PROXY / ANTHROPIC_* env vars
• No custom URLs in .claude.json
• netsh excluded port ranges: only 50000-50059 (normal)

Also tested:

• Multiple browsers (Opera, Chrome) → same ECONNREFUSED on callback
• Removed .claude.json and .claude/ → re-init OK but /login still fails
• Both OAuth flow and desktop app "Claude Code" tab produce same error

Workaround in use: desktop app chat tab works fine, only /login flow and Claude Code tab affected.

What Should Happen?

to be able to use claude code

Error Messages/Logs

Steps to Reproduce

Steps to reproduce:

1. Fresh install via npm install -g @anthropic-ai/claude-code
2. Run claude → "Welcome back!" banner displays correctly
3. Run /login → browser opens, OAuth completes on Anthropic side
4. Callback to localhost fails with OAuth error: ECONNREFUSED

Claude Model

None

Is this a regression?

I don't know

Last Working Version

No response

Claude Code Version

2.1.143

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

No response

[github-actions]

Found 3 possible duplicate issues:

1. [BUG] Claude Code login fails with OAuth timeout on Windows #44257
2. [BUG] OAuth login fails with "Internal server error" (status 500) on Windows — Claude Max subscription #44725
3. [BUG] VS Code Extension OAuth Auth Loop on Windows — Extension Repeatedly Loses Authentication Despite Successful Browser Authorization #33122

This issue will be automatically closed as a duplicate in 3 days.

• If your issue is a duplicate, please close it and 👍 the existing issue instead
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🤖 Generated with Claude Code

[github-actions]

This issue has been automatically closed as a duplicate of #44257.

If this is incorrect, please re-open this issue or create a new one.

🤖 Generated with Claude Code

[github-actions]

This issue has been automatically locked since it was closed and has not had any activity for 7 days. If you're experiencing a similar issue, please file a new issue and reference this one if it's relevant.