API: Basics and authentication

API key

In order to obtain an API key, please contact Fennoa Sales or Fennoa Support. An API key is needed to access all API functions.


API keys are always linked to a Fennoa user. Permissions for an API key (or API user) can be set using Fennoa UI (Fennoa -> Users). It is recommended to grant only the permissions needed (ie. not ”full access” if API is only used to create sales invoices).

Calling API functions

Fennoa API URL’s are always the same, regardless of the company used:


For example:


Authentication and selecting company
For authentication and selecting a company, Basic Authentication is used: