Is it possible currently to use polygon.io as the data provider and IB for execution?

Thanks.

Apparently the community-supplied Alpaca plugin uses Polygon data. If this is true, you can use it at the same time as the IB plugin.

Then you run a script that uses two plugins - one will be polygon, and the other, IB. Technique is described here:
https://zorro-project.com/manual/en/brokerarb.htm