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. See registry upload openapi.

Google APIs

We find descriptions of Google APIs in three places:

1. Protocol Buffer descriptions in the googleapis repository. See registry upload protos.
2. The Google API Discovery Service. See registry upload discovery.
3. A subset of the OpenAPI Directory. See registry upload openapi.