About the Unzer API
The Unzer API connects your business to the Unzer payment infrastructure.
The Unzer API is based on the representational state transfer (REST) architectural style.
You can make requests to the Unzer API resources with standard HTTP methods.
The Unzer API sends a response with a JSON payload that contains detailed information about the requested resource.
The Unzer API supports only UTF-8 characters.
Use our sandbox environment to safely test your interaction with the Unzer API.
Requests made with your sandbox API keys never affect real payment networks and are never billed by Unzer.
The Unzer API errors are indicated by HTTP response codes.
To let you quickly implement a variety of payment stolutions into your system, we offer a whole range of integration solutions and materials:
The main URL for the Unzer API is:
The current version of the Unzer API is:
When we release a new API version with backward-incompatible changes, we keep the previous API versions still available.