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API Rate Limit Headers: What to Send With a 429, and How Clients Should Wait

A 429 Too Many Requests tells a client to slow down; Retry-After and the rate limit headers tell it for how long. What each header means, how GitHub, OpenAI, Anthropic and Discord write them, and a retry loop that honours Retry-After and backs off with jitter.

CodeTrendy Editorial Team

October 21, 202610 min read