I wanted to add some features to this unofficial Aternos API, which uses BeatifulSoup and Requests to interact with the Aternos website under your account using some cookies.

• Get started using @Duerocraft's Youtube video. The functions used are not outdated, but you won't need all the cookies in the original example.
• You will need to get your cookies to use this "API", which is really just a set of web scraping functions. See below.

• Open the Aternos server homepage after logging in (aternos.org/server).
• Open Inspect Element or your browser's equivalent. Then switch to the network tab.
• Click on an event whose "Domain" is aternos.org. Look to the right for the Headers section.
• Scroll down to the "Request Headers" section under Headers.
• Copy the value next to "Cookie".
• This is the value (as a str) you will need for the 'headers' parameter of AternosAPI().
• Unaltered from the original example, the 'cookie' parameter of AternosAPI() should be "udpBAQS9ft13yXRMAQNc5rPFn9Tge5gQTLhqKimd5l2lfMH1am31UcSUY66AIDp9KOdacihXfzTEh0NuF1NuVEOf3npMyhwQNZPg".
• I am not very familiar with cookies and web scraping, but this was in @Duerocraft's example, and it works for me.
• Observe that your cookie value probably contains something along the lines of "ATERNOS_SEC_somerandomstuffhere=morerandom37x40200;".
• With this example, the 'SEC' parameter of AternosAPI() will need to be "somerandomstuffhere:morerandom37x40200".