Integrating with vendors' stock

Hi there,

I have somebody doing some work on my site currently to ensure it’s as easy as possible for sellers to register and upload products, etc.

I was talking to one vendor who was asking if it was possible to integrate stock amount with their backend. So if someone bought three fo their products through my site, they’d be deducted from their stock amount on their site.

They were using ecwid and Stripe systems. Is it an easy thing to integrate with each customers payment systems or would it get a bit messy?