A push-based architecture is a system where the server sends data to clients automatically when an event occurs, instead of clients repeatedly requesting data (polling).
In contrast, pull-based APIs require continuous requests, leading to wasted calls and higher costs.
In Amazon SP-API, the Notifications API is a push model: when an event happens (like a report completion or order update), Amazon sends a webhook to SQS instantly.
This eliminates polling, reducing API calls by up to 95%, lowering costs, and preventing 429 throttle errors.
Result: fewer requests, real-time updates, and scalable, event-driven integration.