Let's say I live on Nurdsburg Island, with only one air route overhead. I hear a plane and want to see its details. No map display needed. In fact there is not too much bandwidth on my island anyway. Sure, I could fire up globe adsbexchange com and see it on the map. But perhaps there is a simpler REST way: GET ....ALL_PLANES_IN_BOUNDING_BOX=.... That would return a JSON etc. list. Sort of like the question how-to-set-up-an-email-alert-when-an-aircraft-flies-into-a-region.631643/ but instead triggered manually via my ears.
Opening the map with the location should be sufficiently low bandwidth if you browser has a cache. https://globe.adsbexchange.com/?lat=-40.939&lon=147.542&zoom=6.0 This and clicking one plane was around 30 kByte. With cache disabled it's 500 kByte. There is no public API, use the map please, thank you.