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Codex Blocking Incident

·2026.04.16 22:48

Key point

An account of Codex OAuth being blocked at `chatgpt.com/backend-api` due to Cloudflare bot protection.

Details

On openai-codex/gpt-5.4, a blocked status appears, with the cause explained as Cloudflare bot protection.

Since chatgpt.com/backend-api is a browser session endpoint, OpenClaw's HTTP client hits the challenge before token verification even happens.

  • The OAuth token is valid, but re-authentication doesn't resolve the issue
  • The problem appears to be Cloudflare blocking on OpenAI's side
  • Two practical workarounds are suggested for using GPT-5 models
    • A paid plan using an OpenAI API key
    • Going through the GitHub API via GitHub Copilot OAuth
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