The REST API is used to get data from the server. The client requests a record, the API takes that request to the server, the server fetches the record from the database, and lastly, the REST API brings it back to the client.
You develop a REST API when you are building a full-stack application. You can also build public REST APIs and monetize them using RapidAPI Hub.
You need to version your REST API every time you introduce a breaking change. This gives your API consumers time to update to the latest version while their products are still active.
Let’s take a look at some of the best practices for API versioning.
It is an excellent practice to have your API backward compatible. If your API user is not interested in moving to the latest version, they should have something to use and get by with it. Otherwise, they would have to migrate to the newest version even if they don’t need it.
While creating new versions of your API, you should add the version number in your API URI. This will provide readability to your API consumers, and they will know which version of API they are using at the moment.
You use semantic versioning to version your API, i.e., major.minor.patch. If you have introduced some major changes that would break the previous version, you should update the major version like 2.0.0. You update the minor one when you make some new changes, but they are not breaking the previous release. And lastly, if you are patching some bug, update the patch number.
Since you are creating different versions, you must keep your API documentation up-to-date. Also, make sure you write documentation based on the API version and separate documentation for each version. This way, the users who are still using the old version can look up anything they need from your API.