A set of API endpoints that allow you to initiate, settle, and modify payments on the Adyen payments platform. You can use the API to accept card payments (including One-Click and 3D Secure), bank transfers, ewallets, and many other payment methods. To learn more about the API, visit [Classic integration](https://docs.adyen.com/classic-integration). ## Authentication To connect to the Payments API, you must use your basic authentication credentials. For this, create your web service user, as described in [How to get the WS user password](https://docs.adyen.com/user-management/how-to-get-the-web-service-ws-user-password). Then use its credentials to authenticate your request, for example: ``` curl -U "ws@Company.YourCompany":"YourWsPassword" \ -H "Content-Type: application/json" \ ... ``` Note that when going live, you need to generate new web service user credentials to access the [live endpoints](https://docs.adyen.com/development-resources/live-endpoints). ## Versioning Payments Contact Support: Name: No Contact Email: email@example.com

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Versori’s connector engine means there is no dependency on an existing library of apps, all you need to start is the documentation of the app or system you want to integrate to.