onFact API

Connect Your Own Software with the Bestinvoicing API

The onFact API offers programmers the possibility to link their own software to onFact. For example, you can automatically create customers or invoices in onFact from the data in your own programs, or retrieve customer data from onFact for reuse. A classic example is linking your own webshop to onFact in order to create a customer file and corresponding invoice in onFact, for an order that came in through your webshop.