[external] User Defined API - Overview (Part 1)

External content by Daniel Krüger; May 30, 2026;
The original post has appeared on daniels-notes.de

User Defined APIs in WEBCON BPS are more than just another way to reach the Public API. They solve a real problem for integrations built inside the Portal itself.

The core advantage is authentication. By using the current user session, these APIs can be called from JavaScript in forms and dashboards without exposing OAuth credentials. The request body is also far simpler than that of the Public API, making them easier to work with and well suited for AI assisted development.

Three running modes are available:

1. Reading data from a data source
2. Performing actions on a workflow instance
3. Executing an automation with input and output parameters

The post also covers common pitfalls like timezone and error troubleshooting. If you are interested in this, you can find more information in this blog post.