Syntax for Adding Geo Point to multiple Categories use REST API

I want to add a geo point to multiple categories but not finding the correct syntax.

I’ve tried
&categories=cat1, cat2
&categories={cat1, cat2}

The first option you tried should work, but remove the space after the comma.
Here’s a request I just tried, works like a charm:

 curl -H application-id:MYAPPID -H secret-key:MYSECRETKEY -X PUT -v ",bar"

Thanks, i removed the spaces between the category items and it works very well.

Example that works: