Bardeen doesn't have an API (see https://support.bardeen.ai/hc/en-us/articles/23958651015693-Is-there-a-Bardeen-API-or-custom-webhooks).

However, it is possible to send a query from Bardeen using HTTP requests (as per the note on that page). You could direct these requests to a Make scenario with a Custom Webhook trigger, perform some work in Make and then optionally return results in the Webhook response.

As GET query parameters or POST payload can be different every time, there's no way to create a single Bardeen app for Make. Custom Webhooks are the best route.

See this course in the Make Academy for more details on using Custom Webhooks: https://academy.make.com/courses/IntermediateC04