API objects in AL

AL in Business Central gives you the ability to create two types of objects dedicated to the RESTful API if the built-in pages are not sufficient to interchange data with external systems. If you need to read and write data, use a page of the API type. If you need to read data, possibly from multiple tables, use a query of the API type:

• API page: Supports read-write transactions. Cannot be extended. Exposes data from a single table.
• API query: Read-only operations. Cannot be extended. Can expose calculated data from multiple tables.

API pages have a set of required properties that must be filled in, as listed in the following table:

APIPublisher	Sets the publisher of the API endpoint the page is exposed in. APIPublisher contains the first part of the URL for the endpoint.
APIGroup	Sets the group of the API endpoint the page...