From Neocron Wiki
Current API Authentication
Sites supporting API Authentication can be accessed by sending the following HTTP headers in your request. Available to the Items DB from 1st February 2021. The Rares DB and Stats DB will support this method in the near future.
|HTTP Header||Required value|
|X-THN-API-Key||Your 40 character API key|
|X-THN-API-Secret||Your 64 character API secret key|