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Properties and constraints for the Notification APIs.

Push Notifications

PropertyConstraints
Maximum FCM providers per appContact support for limits
Maximum APNS providers per appContact support for limits
Maximum push tokens per user100 active tokens
Push token valueMax 4,096 characters

Email Notifications

PropertyConstraints
SendGrid API keyRequired for SendGrid provider
Custom provider webhook URLMust be a valid HTTPS URL

SMS Notifications

PropertyConstraints
Twilio Account SIDRequired for Twilio provider
Twilio Auth TokenRequired for Twilio provider
Custom provider webhook URLMust be a valid HTTPS URL