Foundation
Your other systems hear about it as it happens.
A REST API reads and writes the same data your staff work on. Webhooks fire on what changed, so the systems around the association are told rather than polled. The integration you build is one you can keep.
Reach your records over HTTP
Members, organizations, orders and registrations are readable and writable, so the tools your association runs alongside this one are working on the same data rather than on last night's copy of it.
Subscribe to what changed
A webhook fires when something happens in the system. The other side hears about it without asking on a timer.