The API doesn't support anything that requires authorization but it is still possible.
You just have to pass two headers: x-session-id and your authorization key. These are temporary and do change every once in a while. If you are wondering how to get these, just go into your console, open developer tools which is found when you click the three dots at the top right screen of the browser, click on "More Tools" and click developer tools. This is also the same thing as inspect. Then go to network and wait for a request called "all_data" shows up. You should be able to click this and scroll down to find them.
You can also find this tutorial at https://github.com/TeamMH/minehutxyz/blob/apidocs/api/auth.md
Prorickey's post in MongoSK 2 isn't working? was marked as the answer