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