Calendly API integration with IFS


I am trying to connect Calendly and Infusionsoft Max classic via Webhook and api. (and trying to do the integration without zapier) Though I have no clue how to make it work.

I can see that calendly is offering a personal token or oauth. But then how and where will I connect data from calendly to infusionsoft?

What I’m after is creating a new contact / adding a tag to those who scheduled an appointment on calendly. Any help is greatly appreciated.

It looks like you need an intermediate service to handle the integration, here are a couple I found with a quick Google search: