[BUG] console.anthropic.com SSL is not trusted - API Error: Connection error - VS Code extension

Resolved 💬 3 comments Opened Oct 23, 2025 by rvnikita Closed Oct 27, 2025

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 Code through VS Code extension is not working for me. I am getting "API Error: Connection error."

After some investigation is seems the main reason is a strict SSL check on my network. We see "Dropped due to failed client SSL handshake".

I've checked console.anthropic.com on https://www.sslchecker.com/sslchecker and getting

Vendor signed No SSL is not trusted

I believe this is the reason for an error

What Should Happen?

SSL should be signed, so VS Code Extension works

Error Messages/Logs

Steps to Reproduce

  1. Run VSCode extension
  2. Write "hello"

Claude Model

Sonnet (default)

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

1.0.61 (Claude Code)

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

VS Code integrated terminal

Additional Information

<img width="2226" height="1166" alt="Image" src="https://github.com/user-attachments/assets/7dc615c4-2f31-4544-a85e-77c77e44d35d" />

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