Header category
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
175 provider declarations
| Header | Providers | Status | |
|---|---|---|---|
| Idempotency-Key | 127 | de-facto | |
| x-idempotency-key | 45 | de-facto | regulated |
| Repeatability-Result | 1 | provisional | |
| Repeatability-Request-ID | 1 | provisional | |
| Repeatability-First-Sent | 1 | provisional | |
| Safe | — | obsoleted | |
| Repeatability-Client-ID | — | provisional |
All categories
Authentication Authorization & Scope Caching Conditional Requests & Concurrency Content Negotiation Representation Metadata Connection & Transport CORS Security Policy Privacy & Consent Rate Limiting & Quota Tracing & Correlation Idempotency & Reliability Versioning & Lifecycle Integrity & Signing Async & Long-Running Cost & Metering Agent & Bot Identity