Does Amazon SNS use GET or POST to an http subscription?

Question

I could not find anything documentation regarding method or format of message.

Answer 1

The Amazon Simple Notification Service (Amazon SNS) is using a HTTP POST to deliver a notification message, see the FAQ What are the different delivery formats/transports for receiving notifications?:

• “HTTP”, “HTTPS” – Subscribers specify a URL as part of the subscription registration; notifications will be delivered through an HTTP POST to the specified URL.

The notification message format is documented in HTTP/HTTPS Notifications JSON Format (the Subscribe/Unsubscribe JSON Formats are documented in Appendix D: JSON Formats as well).