codex - 💡(How to fix) Fix macOS: Cloudflare 403 blocks all chatgpt.com/backend-api/codex/responses requests — CLI unusable while browser works on same network

TL;DR

The issue is likely due to Cloudflare detecting the Codex CLI as non-browser traffic, resulting in a 403 Forbidden response, and a workaround or fix related to TLS fingerprinting may be necessary.

Guidance

• Verify that the issue is indeed related to Cloudflare's detection of non-browser traffic by checking the cf-ray header in the response.
• Investigate the possibility of modifying the Codex CLI to mimic browser-like TLS fingerprinting, as hinted at in the reference to #17860.
• Check if there are any updates or patches available for the Codex CLI version 0.121.0 that may address this issue.
• Consider using a different terminal emulator or configuration to see if the issue is specific to the default macOS Terminal.app.

Example

No code snippet is provided as the issue does not explicitly mention a code-related fix.

Notes

The issue may be specific to the combination of Codex CLI version, ChatGPT Pro subscription, and macOS Terminal.app. The reference to #17860 suggests that this issue may be related to a known problem with rustls TLS fingerprinting.

Recommendation

Apply workaround: Given the likely cause of the issue, applying a workaround related to TLS fingerprinting, such as modifying the Codex CLI to mimic browser-like behavior, may be the most effective solution until a fixed version is available.