API 1.0

This page remains in place for backwards compatibility for customers who have built integrations using Certain's legacy Web Services API 1.0. Important Note: All new integrations should be built using Certain API2.0.

API 2.0 uses basic authentication, so an API key is not required (as it was for API 1.0).
Two things are required:
A Certain username and password for a user whose user profile has API Access enabled.
Web Services enabled as an account-level product in the account you wish to access.

Access (for Administrators only) via: Account Settings > Implementation > API

See documentation for developers at https://developer.certain.com/api2doc/.