need rpc url

Do you mean, where would the xmlrpc.php be? For me it is at url.com/wordpress-location/xmlrpc.php I hope this helps you. AFAIK, it will work with most API’s, good luck.

So is the rpc url url.com/wordpress-location/xmlrpc.php
Where the url.com would be in my case, the url of my WordPress?

Yes