Push notification documentation

Hello,
I am becoming crazy: I can not find the documentation for the API to send notifications (the one that is implemented in ExponentPhpSDK for example)
Thanks for your help!

This is the push notification guide:

https://docs.expo.io/versions/latest/guides/push-notifications/

And this is the Notifications API docs:

https://docs.expo.io/versions/latest/sdk/notifications/

Thank you for this very quick answer.
I fonded these topics. I’m looking for the description of the push server API for sending messages.
What are the possible options: title, body, …
When should I subscribe
And so on…
Regards

In terms of the options, is this what you’re looking for?
https://docs.expo.io/versions/latest/guides/push-notifications/#message-format

Oh yes, that’s great
thank you very much
It seems that I didn’t read carefully enough…
Regards