Expires
IANA permanent
response
RFC 9111
2 spellings
Declared by 20 providers across 1413 published specification files in the APIs.io network.
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.
Expiresexpires
The registry
| Status | permanent |
|---|---|
| Reference | RFC 9111, Section 5.3: HTTP Caching |
Providers declaring it (20)
amazon-s3 aws-s3 bird chili-piper constructorio deliverect engineering-platform eve-online extreme-networks hopper-com oracle roadsync salesforce sp-global spectro-cloud upwind upwind-security vtex wikimedia wikipedia