Glossary: System Design Basics
Idempotency key
Also written: Idempotency-Key
A unique ID the app sends with a request, in an `Idempotency-Key` header, so the server can return the first result for a retry instead of, say, charging twice.
Glossary: System Design Basics
Also written: Idempotency-Key
A unique ID the app sends with a request, in an `Idempotency-Key` header, so the server can return the first result for a retry instead of, say, charging twice.