Important information



Look up all the Unzer API reference information in a dedicated section.

API reference
Learn more about the different API endpoints.

Basic integration requirements
Learn about the common basic requirements for your integration.

Learn more about all the languages and formats available.

Merchant Advice Error Codes
Learn about various response codes and categories for card authorization reattempts.

Supported webhook events
Learn more about all the supported webhook events.

Test data
Use the test data to test your integration for different payment methods.

E-Com ETN files for financial reconciliation
Learn about the financial reconciliation file and format.

Learn more about the basic terms used in the payment industry.