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Documentation can be time-consuming to create from scratch. In many cases, it’s an afterthought. You’ve already designed and built the API. Now you need to figure out how to tell others how to use it. Whether it’s internal or external API consumers, they’ll want to know about authentication, the endpoints, and what response data to expect. Once you collect all the information, then you need to figure out how to present it.
Yet, we’ve all had at least one great experience with documentation, where everything you need is effortlessly communicated. In this post, we’ll outline a shortcut for documenting your API and provide templates you can use to create great docs for your REST API.
Before you look for API documentation templates or create your own, take a moment to review what should be included. At a minimum, you’ll need an API reference, which explains the various API endpoints, how requests are constructed, and what to expect as a response. On the surface, it’s straightforward, but it’s easy to forget important details that enable robust integrations.
Make sure your API reference templates include the following information:
In addition to the reference, there are likely other types of documentation your users will expect. Supplemental documentation helps improve the developer experience, especially during the initial integration, and can communicate the use cases your API supports.
While not required, you should consider whether your API templates can include these other types of documentation:
These various requirements of great documentation can be overwhelming, especially when you’re trying to quickly communicate what’s possible to API consumers. As you continue to build the API, it’s even harder to keep the documentation updated with what’s new. Wherever possible, look to automate as much of your API documentation as is reasonable. In the next section, we’ll look at methods to generate complete API references.
Now that you have an idea of what should be included in your documentation, it’s time to create it. While you can write it by hand, it is less than ideal. Plus, with the same amount effort put into generating your API reference, you can create other benefits for your engineering team and organization at large.
Time and accuracy are among the huge advantages to using a documentation generator:
A prerequisite to generating any meaningful documentation is an OpenAPI document. This API definition, sometimes called a Swagger file, describes the endpoints, request data, responses, and other details of an API in a machine-readable format. Among the many uses of an OpenAPI document is to generate API reference docs.
Stoplight Studio is a visual OpenAPI editor, which can help you produce an initial OpenAPI document for your API. You can also import existing API descriptions and make changes without having to directly edit JSON or YAML.
Finally, click the Publish button within Stoplight Studio to generate the documentation for your API reference. You can also add Markdown files to cover other areas of your documentation, such as getting started guides, samples, and tutorials.
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