What Is API Versioning? – Brief Definition and Why It Matters
API versioning allows clients to consume new features without breaking existing contracts. When I added a new reporting endpoint in a production ERP system, I made versioning mandatory to avoid breaking existing integrations. In my first experience, after a week with %23 error reports, I spent an additional 2 hours on maintenance due to missing versioning. These kinds of issues echo not only in client code but also in logs and monitoring systems.
There are two main approaches: URI‑based versioning and Header‑based versioning. Both have a place in RFC 7231 (HTTP/1.1), but to see which creates less version‑management complexity in practice, we need to look at a real scenario.
URI‑Based Versioning – How It Works
URI‑based versioning specifies the version directly in the URL:
