Custom SIP NOTIFY event


Is it possible to send custom SIP NOTIFYs? I have a phone which is provisioning using a custom config server.
The config is fetched every boot but not in realtime after a change (phone checks daily).

The vendor has a functionality that triggers an update if a SIP NOTIFY with an event set, is received.
To make this work, I need to hook into asterisk.

I would like to use RabbitMQ for this purpose but how do I send custom SIP NOTIFY via asterisk?
Asterisk ARI sounds like it could handle this(?).

There is some control afforded for sending a custom NOTIFY.

See -

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I think AMI is what you would want to use.