rate-limit-edge-function

Implement rate limiting for Supabase Edge Functions by using a rate_limit_counters table and a check_and_increment_rate_limit RPC to track and restrict request frequency. This protects sensitive functions from abuse and ensures fair usage.

The best way to prevent abuse on an email sender Edge Function is to apply rate limiting using a dedicated counter table and RPC, setting a specific request limit like 5 requests per minute per user to block spam.

Yes, this approach supports customizable limits. You can configure rate limits based on each function's specific requirements and usage patterns, allowing you to set different thresholds for endpoints like PDF generators and email senders.

The check_and_increment_rate_limit RPC works with the rate_limit_counters table by checking the current request count for a user and incrementing it. If the count exceeds the configured limit, the system handles the rate limit violation.

You need rate limiting on Supabase Edge Functions when protecting sensitive endpoints like PDF generators or admin actions from repeated calls. It prevents unauthorized access, stops spam, and ensures fair resource usage across users.