Integration & documentation
Billie Developer Portal
In our developer portal, you will find documentation and information around our various ways to integrate Billie into your online store.
Documentation
Integration Types
Direct Integration
Direct Integration
Would you like to start a direct integration? Find our Billie PHP, SDK, and API documentation here.
Plugin Integration
Plugin Integration
Are you using a standardized store system? We provide plugins for the most common shop systems.
Billie via Klarna-Integration
Billie via Klarna-Integration
Billie and Klarna have an exclusive partnership. Merchants who have already implemented Klarna Payments or Klarna Checkout in their online store can add Billie via their existing integration.