The API is a very useful instrument when connecting online or desktop applications with your Billomat account. No matter if you want to extract or insert data from/to Billomat, the API makes it possible! The probably best known open application, that requires an API key, is Amazon. During the setup it is required to provide an API key. But where can I find the API key?
You will find the API key under > Settings > Administration > User. Select the user who shall get access to the API. When you select the respective user, click on "Edit", after which you need to mark the checkbox "Activate?" under API access in order to view the API key.
Of course, you will also find general help about this topic. This paragraph is a little bit short for such a broad theme, that is why you will find detailed instructions and help on how to use the API here.