Can someone please verify that the API for contact>duplicatecheck is actually working?
In my case the UI will return 8 dupes, but the API will not return any.
It seems to be broken as of late. From what I understand, running duplicatecheck without any parameters from the API explorer "should" return all duplicate contacts using the default unsupervised rule (for individuals). I have checked the official sandbox for drupal and it does not appear to work either.
If you can get it working, can you please supply the PHP code that worked?