API Versioning Strategies
Change is inevitable. But breaking your users' code is not. API Versioning allows you to evolve your API while keeping existing integrations working.When to Version?#
Non-Breaking Change: Adding a new optional field. -> No version change needed (or minor patch).
Breaking Change: Renaming a field, removing a parameter, changing data type. -> New Version Required.
Strategies#
There are three main ways to handle versioning in REST:1. URI Versioning (Most Common)#
Include the version in the URL path.Pros: Explicit, easy to cache, easy to explore in a browser.
Cons: "Pollutes" the URI resource space.
Pros: URIs stay clean (GET /users is always the path).
Cons: Harder to test in browser (requires extensions), caching is trickier.
3. Query Parameter Versioning#
Cons: Can get messy with other query params.
Managing Deprecation#
You can't support all versions forever.1.
Sunset Header: Use the Sunset HTTP header to announce when an endpoint will stop working.Sunset: Sat, 31 Dec 2025 23:59:59 GMT
2.
Communication: Email your developers well in advance (6 to 12 months for major APIs).
3.
Brownouts: Short, planned outages of the old API to get the attention of developers who ignore emails.
Key Takeaways#
Avoid Breaking: Try to make additive changes (non-breaking) whenever possible to avoid the cost of versioning.
Be Explicit: URI Versioning (/v1) is the industry standard for public APIs due to its clarity.
Plan for Death: Every version you birth needs a plan for how it will eventually be retired.
Modified atΒ 2026-02-12 06:23:15
