Idempotency & Reliability
Headers that make a retry safe. Almost entirely a payments-industry invention that the rest of the API economy has not adopted.
7 headers, ordered by how many providers in the catalog declare them.
Idempotency-Key
127 providers
4 spellings
The header that makes a retry safe. A payments-industry invention the rest of the API economy has barely adopted.
x-idempotency-key
45 providers
regulated
2 spellings
The x-idempotency-key HTTP header — idempotency & reliability, declared by 45 providers in the API Evangelist catalog.
Repeatability-Result
1 providers
The Repeatability-Result HTTP header — idempotency & reliability, declared by 1 providers in the API Evangelist catalog.
Repeatability-Request-ID
1 providers
2 spellings
The Repeatability-Request-ID HTTP header — idempotency & reliability, declared by 1 providers in the API Evangelist catalog.
Repeatability-First-Sent
1 providers
2 spellings
The Repeatability-First-Sent HTTP header — idempotency & reliability, declared by 1 providers in the API Evangelist catalog.
Safe
The Safe HTTP header — idempotency & reliability, RFC 2310, not observed in the catalog.
Repeatability-Client-ID
The Repeatability-Client-ID HTTP header — idempotency & reliability, not observed in the catalog.