Traceparent
IANA permanent
response
3 spellings
Declared by 6 providers across 182 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 3 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.
traceparentTraceparentTraceParent
The registry
| Status | permanent |
|---|---|
| Reference | Trace Context |
Providers declaring it (6)
arthurai cint fauna microsoft-azure scylladb vtex
Explore
All headers Tracing & Correlation Guidance on headers.apievangelist.com