Add Mario Kart Tour (#1848)

README.md

@@ -512,6 +512,7 @@ API | Description | Auth | HTTPS | CORS |
 | [Jservice](http://jservice.io) | Jeopardy Question Database | No | No | Unknown |
 | [Lichess](https://lichess.org/api) | Access to all data of users, games, puzzles and etc on Lichess | `OAuth` | Yes | Unknown |
 | [Magic The Gathering](http://magicthegathering.io/) | Magic The Gathering Game Information | No | No | Unknown |
+| [Mario Kart Tour](https://mario-kart-tour-api.herokuapp.com/) | API for Drivers, Karts, Gliders and Courses | `OAuth` | Yes | Unknown |
 | [Marvel](http://developer.marvel.com) | Marvel Comics | `apiKey` | No | Unknown |
 | [mod.io](https://docs.mod.io) | Cross Platform Mod API | `apiKey` | Yes | Unknown |
 | [Open Trivia](https://opentdb.com/api_config.php) | Trivia Questions | No | Yes | Unknown |