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API Design

Idempotency Key

A unique identifier sent with API requests to ensure that retried requests don't create duplicate side effects, commonly used in payment APIs.

Related Protocols

HTTP

Mentioned in Guides

Implementing Webhooks: A Complete Guide API Design & Best Practices
Implementing Retry with Exponential Backoff Error Handling Patterns
Idempotency Keys for Safe API Retries Error Handling Patterns

See Also

Idempotency HTTP Concepts
Rate Limiting API Design
Retry Strategy Error Handling
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