Hello Peter!

In the 1C platform, it is possible to use as a standard REST interface (also so-called OData interface), or to create the necessary program code that will work in the way you need, from scratch.

In the first case, these publications will help you:

https://1c-dn.com/blog/synchronization-between-a-mobile-app-and-a-database-server-on-the-1c-platform/

https://1c-dn.com/developer_tools/synchronisation_between_a_mobile_app_and­_a_database_server_using_rest_api/


In the second case, I can suggest taking a look at this example:

https://1c-dn.com/blog/work-with-http-services-in-1c-part-1-get-method/

https://1c-dn.com/blog/work-with-http-services-in-1c-part-2-post-method/

The second case describes the creation of a classic server capable of processing POST and GET requests.

Thanks, Alex, for your comprehensive response.
For my situation the second case part 2 would work, most likely.