Glossary term
What is 429 (429 Too Many Requests)?
429 stands for 429 Too Many Requests.
The status code for rate limiting. It comes with a Retry-After header that says when to try again.
Learn it properly · Practical Design ProblemsLesson 2: Design a Rate LimiterToken bucket, leaky bucket, fixed and sliding windows, where to apply limits, 429 with Retry-After, and the new RateLimit headers.