How I Built a Free Python Practice Platform With Zero Server Costs Using Groq and Supabase

Short summary

PyCodeIt runs on zero server costs using a Bring Your Own Key (BYOK) model: users authenticate via Supabase but send all AI requests directly to OpenRouter using their personal API keys, removing central infrastructure expenses. Supabase's free tier provides auth, a PostgreSQL database for tracking practice stats and streaks, with Row Level Security ensuring users only access their own data. The system automatically falls back across 8 AI models for reliability, making the platform infinitely scalable at no cost to the operator.

• •BYOK architecture routes AI requests directly from user's browser to OpenRouter, eliminating server compute costs
• •Supabase free tier handles auth, scoring database, and Row Level Security for secure multi-user support
• •Automatic fallback logic across 8 models ensures reliability while keeping platform ops cost-free at scale

Generated with AI, which can make mistakes.