Is there a max notification payload size? Pushy Support May 21, 2020 21:36 Updated Yes. The notification data payload for the Send Notifications API is limited to 4kb in stringified JSON maximum string length. Get in touch with us if you need to send more than 4kb. Related articles Is Pushy GDPR-compliant? How does Pushy work? Where are the Pushy Pro servers hosted? Does Pushy support the FCM notification parameter on Android? Does Pushy have a bug bounty program?