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RateLimit

de facto — unregistered response 2 spellings

Declared by 33 providers across 2239 published specification files in the APIs.io network.

What this header is for, and how to use it →

A count here is providers whose published contract declares this header — not providers who send it. Response headers set at the edge rarely appear in an OpenAPI at all, so a low number can measure documentation practice rather than deployment.

Spelled 2 ways

HTTP field names are case-insensitive (RFC 9110 §5.1), so every spelling below is the same header on the wire. A contract is not the wire: generated clients key off the string, and a developer reading two of these sees two different headers.

RateLimitRatelimit

Providers declaring it (33)

aldermore anchorbrowser api-pulse apiops-cycles-canvas bank-of-ireland-uk bank-of-scotland bargo-congress-trades-api chase-uk coasty coutts coventry-building-society cyclecalcs cynergy-bank first-direct gb-bank hampden-and-co honeycomb-io investec kroo lloyds-banking-group messaging-api monument-bank open-banking-uk orders-api paragon-bank persons-api products-api recognise-bank santander-uk secure-trust-bank shawbrook-bank tandem-bank triple-whale

Explore

All headers Rate Limiting & Quota Guidance on headers.apievangelist.com