API call to retrieve Leads/Contact from ProspectLists(Target List) which are linked after a certain date

There is no dedicated API call yet for that specific information.

Perhaps you could define a custom collection definition on the ProspectList module to enable something like 
.../rest/v10/ProspectLists/<id>/collection/leadlist

But unfortunately the documentation for such a custom definition of a collection is still not available. Perhaps you can have a look on collection definitions in vardef files.

Hi Harald,
Thank you for your quick response. Is there a table between Lead/Contact and ProspectLists? I'm looking for leads/Contacts linked to ProspectLists after a specific date. 
My API calling this - /{ProspectLists }/{id}/{Link}/{leads} with filter date_modified >= Specific Date.

This does not bring me leads that are linked to ProspectLists after a specific date if I add existing leads.
It's working only if I add brand new leads to ProspectLists.

The relationship between ProspectLists and Leads is stored in the table prospect_lists_prospects which contains the id of the ProspectList, the Type of the linked record (e.g. Leads), the creation/modification date of the link and a deleted flag.

The API call - /{ProspectLists }/{id}/{Link}/{leads} with filter date_modified >= Specific Date delivers the Leads which were created after the Specific Date.

The only way to filter the relationship date is to write an own API endpoint - or in Enterprise edition and above - a custom query to retrieve the links directly from the database.

As a test I created such a little API function just for that usecase in custom/clients/base/api/customRelateApi.php which I attach here. Perhaps you can use it as a template for own developments. Please check the comments and the code and do not test it in production !!! but in a local test environment.

customRelateApi.zip

The relationship between ProspectLists and Leads is stored in the table prospect_lists_prospects which contains the id of the ProspectList, the Type of the linked record (e.g. Leads), the creation/modification date of the link and a deleted flag.

The API call - /{ProspectLists }/{id}/{Link}/{leads} with filter date_modified >= Specific Date delivers the Leads which were created after the Specific Date.

The only way to filter the relationship date is to write an own API endpoint - or in Enterprise edition and above - a custom query to retrieve the links directly from the database.

As a test I created such a little API function just for that usecase in custom/clients/base/api/customRelateApi.php which I attach here. Perhaps you can use it as a template for own developments. Please check the comments and the code and do not test it in production !!! but in a local test environment.

customRelateApi.zip

Thank you very much, Harald. This answered my question.