Analyzing APIs in Public API Collections

To explore some of the things that we can do with an API Registry, we look at several publicly-available collections.

The OpenAPI Directory

The OpenAPI Directory is a large collection of OpenAPI descriptions of REST APIs curated by apis.guru. This can reveal patterns and properties of APIs across the industry.

Google APIs

We find descriptions of Google APIs in three places:

1. A subset of the OpenAPI Directory.
2. The Google API Discovery Service.
3. Protocol Buffer descriptions published in the googleapis repository on GitHub.