[BUG] 401 "Access denied due to missing subscription key" error in v2.1.94 (regression from v2.1.92)

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?

Starting with v2.1.94, Claude Code returns a 401 error on every request. The same setup works correctly on v2.1.92.

What Should Happen?

Requests succeed as they did on v2.1.92.

Error Messages/Logs

401 Access denied due to missing subscription key. Make sure to include subscription key when making requests to an API.

Steps to Reproduce

1. Upgrade Claude Code from v2.1.92 to v2.1.94
2. Run any Claude Code command
3. Error is returned immediately

Claude Model

Sonnet (default)

Is this a regression?

Yes, this worked in a previous version

Last Working Version

2.1.92

Claude Code Version

2.1.94

Platform

AWS Bedrock

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

## Actual Behavior
All requests fail with 401 — missing subscription key.

## Workaround
Downgrade to v2.1.92:
npm install -g @anthropic-ai/claude-code@2.1.92

## Environment

• Claude Code version (broken): v2.1.94
• Claude Code version (working): v2.1.92

## Notes
This appears to be a regression introduced in v2.1.94. The error message format ("subscription key") suggests it may be related to a change in how the API key is
passed in request headers.