Importing data to the property site

For a real estate site made on WordPress, you need to make a constantly working system for importing data from another resource.

Real estate objects must be exported from another portal according to the following scheme:
When exporting to the site, the data source can call a script on our side that will tell us what XML we should download.

The action parameter can be added or deleted, export_id is the offer ID that will be exported/removed.

It is necessary to configure the filters of real estate search according to the specification of the customer