API Page Type

Pages of the type API are used to create versioned, webhook-supported, OData v4 enabled REST web services. This type of page cannot be displayed in the user interface, but is intended for building reliable integration services. When creating this page type, you must specify a number of properties that provide information for the web service endpoint. Use the snippet tpage - Page of type API to get the right template and the list of these properties automatically filled in. This page type cannot be extended by creating a page extension object. Instead, you must create a new API by adding a page object.

Pages of the type API can be used to develop a custom API. For more information, see Developing a Custom API.

Naming conventions

For the API page type, the following naming conventions exist:

  • camelCase for naming attributes, tables, as well as APIPublisher, APIGroup, EntityName, and EntitySetName.
  • Alphanumeric characters allowed (A-Z+a-z+0-9) in above elements.
  • APIVersion follows the pattern vX.Y or beta.

At design time, the compiler will show warnings on casing violations and errors on naming violations. Once an API page is deployed, the corresponding $metadata is exposed on the endpoint of the page.


Use Ctrl+Space to trigger IntelliSense and get assistance on code completion, parameter info, quick info, and member lists.

Example of the API page type

The following page example publishes an API available at: ../contoso/app1/v2.0/companies({id})/customers. The APIVersion can be specified as one version, or a list of versions, if the API is supported through multiple versions.

page 50120 MyCustomerApi
    PageType = API;
    Caption = 'My Customer API';
    APIPublisher = 'contoso';
    APIGroup = 'app1';
    APIVersion = 'v2.0';
    EntityName = 'customer';
    EntitySetName = 'customers';
    SourceTable = Customer;
    DelayedInsert = true;
                field(id; Id)
                    Caption = 'ID';
                field(name; Name)
                    Caption = 'Name';

See Also

AL Development Environment
API Query Type
Developing a Custom API
Page Extension Object
APIPublisher Property
APIGroup Property
APIVersion Property
EntityName Property
EntitySetName Property Developing Extensions