API Deprecation

Overview

What does API Deprecation mean?

API Deprecation is the managed status indicating that an API operation, field, version, or behavior remains available temporarily but is scheduled for reduced support or removal.

How it works in practice

API deprecation is notice that an endpoint, field, authentication scheme or version should no longer be used and may be removed later. A responsible provider publishes migration guidance, timelines, replacements and behavior changes, and ideally measures which client versions remain active. Merchants should inventory every integration, test replacements in a sandbox and monitor warnings well before shutdown. For payments, a migration must preserve transaction references, idempotency behavior, webhook signatures and reconciled ledger state.

Further operational details

API Deprecation is the managed status indicating that an API operation, field, version, or behavior remains available temporarily but is scheduled for reduced support or removal. It is used to give consumers time and guidance to migrate away from an obsolete interface. It differs from immediate retirement, which removes availability without a supported transition period.

Limits and common misunderstandings

Changing an endpoint without replacing its error semantics can make client retry logic unsafe. Retiring a field used for payment-to-order matching may silently break support workflows even though the API call continues to return HTTP 200.

Related glossary terms

API Migration; API Version; API Lifecycle