I have working with FCM console to send push notification and it has an option to schedule the delivery date.
But in the references, this API is not documented as an option. I need to know if its possible to push a notification with predefined delivery date through a POST request.
Using FCM, you can notify a client app that new email or other data is available to sync. You can send notification messages to drive user re-engagement and retention. For use cases such as instant messaging, a message can transfer a payload of up to 4000 bytes to a client app.
FCM does not guarantee the order of delivery. Some typical use cases of non-collapsible messages are chat messages or critical messages.
The TTL message attribute is used to specify expiration metadata about a message. This allows you to specify the amount of time that the push notification service, such as Apple Push Notification Service (APNs) or FCM, has to deliver the message to the endpoint.
If you're looking for a public API of FCM for a scheduled push or a payload parameter where you can set the push date, unfortunately, there's nothing like it as of the moment.
You must implement your own App Server and implement the scheduled push yourself (also mentioned it here).
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