Query FeatureService with Mulitpoints

[Vidar]

How do you query a feature service with many hundreds of points?

I want a return a value from a field (let's call in "COUNTRY_NAME") that returns a country name (surprisingly!) for each point, and that's really important. I need a value for each point, 1 for 1.

I have tried sending a multipoint query but it breaks (probably URL length). Even when I cut down the amount of points - if it finds values that are the same it seems to coalesce them all into one - very annoying and not useful.

Here is a screenshot of what I have done for multipoint queries.  Any help or pointers would be much appreciated as I am still finding my way with all this stuff.