A reverse proxy that treats ChatGPT's website like an API it never asked to be

What it does

ChatGPT-to-API is a Go server that reverse-engineers ChatGPT’s web interface into a fake OpenAI-compatible API. You feed it account credentials; it handles browser automation, token refresh, Cloudflare cookies, and CAPTCHA hurdles, then serves v1/chat/completions on localhost. Multiple accounts cycle automatically to spread load.

The interesting bit

The project treats account maintenance as infrastructure: tokens auto-renew every 7 days, Plus users get Cloudflare rate-limit bypass via PUID cookies, and GPT-4 access requires exporting a browser HAR file to satisfy CAPTCHA. It’s a brittle, elaborate workaround for an API paywall.

Key highlights

• OpenAI-compatible endpoint (/v1/chat/completions) with optional custom API key gating
• Automated token and PUID retrieval via OpenAIAuth from email/password pairs
• Multi-account rotation with access_tokens.json and proxy support
• GPT-4 support for Plus subscribers (requires manual HAR export from browser dev tools)
• Admin PATCH endpoint for runtime token updates

Caveats

• Author explicitly states “you will not get free support” and documentation is intentionally limited
• Requires unblocked IP for authentication; Cloudflare blocks are your problem
• HAR file step for GPT-4 is manual and fragile
• “Scalable” and “for production” in the repo description are aspirational; this is fundamentally a TOS-grey workaround

Verdict

Worth a look if you need programmatic ChatGPT access without an API budget and accept the maintenance burden. Skip it if you want stability, support, or a clear conscience about terms of service.