[BUG] Anthropic API Error: API Key was rejected with Bedrock Bearer Token

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?

Bug Description
All of a sudden I've started getting a "API Key was rejected" error when using a Bedrock Bearer Token.

IMPORTANT Note - When I try to login with Amazon CLI configured env vars, it was not working for the past 2 hours - and all of a sudden it is now working for AWS CLI configured env vars for the same user. It still fails for Bedrock Bearer Token.

Side note - I just setup openclaw on my system, and I think it has cause some conflict issue for env

Environment Info
Platform: Windows 11
Terminal: powershell
Version: 2.1.144 (Claude Code)

What Should Happen?

Successful authentication

Error Messages/Logs

Steps to Reproduce

API key shows:

/setup-bedrock

────────────────────────────────────────────────────────────────────────────────
Set up AWS Bedrock
Verification failed

✘ API key was rejected. Your IAM policy may be missing
bedrock:CallWithBearerToken or bedrock:InvokeModel.

❯ 1. Go back and fix

1. Save anyway (skip verification)

↑↓ to navigate · Enter to select · Esc to go back

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

2.1.124

Claude Code Version

2.1.144

Platform

AWS Bedrock

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

<img width="1768" height="742" alt="Image" src="https://github.com/user-attachments/assets/5be06829-8620-4039-b8a0-4981cfa063eb" />