We are integrating with Sharepoint 2013 currently using REST api at our customer location. We used the foundation version to test out our integration locally in dev environment.
They are planning to upgrade to Sharepoint 2019 and because there is no free/foundation version for Sharepoint 2019, would like to know if we can test out the integration with Sharepoint Online (as we have a subscription).
Basically, is the REST API same or does it work the same way between Sharepoint 2019 and Office 365 SharePoint online?