Glossary
RateLimit headers (IETF)
The IETF RateLimit header draft standardises quota communication using headers such as RateLimit-Limit, RateLimit-Remaining, and RateLimit-Reset (seconds until the window resets — relative in the draft). It is a work-in-progress replacement for the legacy X-RateLimit-* family. Key pitfall: IETF RateLimit-Reset is relative seconds; many legacy X-RateLimit-Reset values are unix epoch timestamps — clients must not parse one as the other.
Formula: RateLimit-Reset (IETF draft) = seconds until reset; legacy X-RateLimit-Reset often absolute unix time.
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See also
Last updated: March 2026