API Query is a tool for querying Application Programming Interface (API) information. With this tool, you can quickly found out which headers belong to a specific API, who is the owner of a particular API, and whether the API has been published in an SDK.
API data is accessed via a data source, such as an online database service. For more information, see Data source.
You can use the following criteria when querying for API information (some of these may not be available with all data source types):
In the API Query tool, you can run a query either from the Search tab or directly from your code. In the code, you can either search for specific identifiers or generate a report about the usage of APIs in your entire project.