Expect
IANA permanent
request
RFC 9110
Declared by 1 provider across 2 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.
The registry
| Status | permanent |
|---|---|
| Reference | RFC 9110, Section 10.1.1: HTTP Semantics |
Providers declaring it (1)
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