How to be notified of a Teams message through Microsoft Graph API

Question

I am trying to figure out how to use Microsoft Graph API to get notified of incoming Teams messages.

I easily find the endpoint to send a message. Create chatMessage in a channel

But I do not find an endpoint to get API messages, either via polling or better via a web hook.

Is there a way to get a user incoming messages via REST (assuming proper authentication) ?

Answer 1

You can get change notifications (i.e. set up a webhook) for Teams channel messages using the beta endpoint of Graph. See the subscription beta documentation and "Create subscription" beta documentation for a list of supported resources, including chatMessage.