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API Versioning Basics

Version APIs without chaos

This guide explains URI vs header versioning, how to mark breaking changes, announce deprecations, and provide migration examples for clients.

Pick a scheme

Use path versions for major breaks; prefer headers for gradual evolution.

Signal deprecations

Add deprecation headers and timelines; publish change logs.

Support migrations

Provide side-by-side responses or adapters; share client snippets.

Sunset cleanly

Remove old versions only after clear notice and monitored adoption.

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