This lightweight API is used within Google and made available to other developers. It makes all of Google's APIs listable and provides additional information about each API, including a full list of resources or methods.
Google uses the API Discovery API internally to maintain client libraries for all of its APIs, as well as to fill a sandbox with potential API calls.
The following is a list of historical changes that were made to this asset. Typically, once an API is published on ProgrammableWeb.com, the data we keep about that asset gets updated over the course of its life. For example, the endpoint or home page of the documentation might change. As a means of enforcing the integrity of our data, every time a non-trivial change is made to the data we keep about an asset, we require the entry of some changelog text before that change can be saved. This way, we have a great audit trail of all activity surrounding the asset. For each asset, the changelogs begins with the moment an asset is approved for publication on ProgrammableWeb. If you spot an error in our data and believe that a record needs to be updated in some way, the ProgrammableWeb team would very much like to hear from you at firstname.lastname@example.org
So far, we don't have a record of any changes to this API