Cursor
performance
API Rate Limit Exceeded After Changes
After Cursor refactored your API request code, the application suddenly exceeds rate limits and receives 429 Too Many Requests errors. API calls that were working are now being rate limited.
The refactored code may be making redundant requests or not implementing proper batching.
Error Messages You Might See
429 Too Many Requests
Rate limit exceeded
Quota exceeded
Too many requests from this IP
Common Causes
- Removed request caching or memoization
- Loop making duplicate API calls instead of batch endpoint
- Removed debounce/throttle on frequently triggered requests
- Polling interval set too short or continuous
- Retrying failed requests too aggressively
How to Fix It
Implement caching: store responses and return within TTL. Use debounce for search/filter: debounce(fetch, 300). Batch requests to single endpoint. Reduce polling interval. Implement exponential backoff for retries: delay = baseDelay * 2^attemptCount.
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Get HelpFrequently Asked Questions
What's debounce?
Waits for pause in activity before executing. Useful for search: only fetch after user stops typing for 300ms.
How do I cache API responses?
Store in variable with timestamp. Check if data is fresh before fetching. Clear on mutation (POST/PUT/DELETE).