How can the Ranking Value of subpages be queried via the API?

How can the ranking value of subpages be queried via the API?

To retrieve the ranking value of subpages via the API, the URL must be specified in the form www.example.tld/blog/*.
Furthermore, the URL must be coded in percent notation, e.g.:
​https://suite.xovi.net/api/keywords/getRankingValue/API-KEY/www.xovi.de%2Fblog%2F*/google.com/json

Additional information