Keyword Parser Script Needed

I need a keyword parser script/program to filter through domain auctions - I would think this would be reasonably easy to find since it is available through plenty of paid platforms and even some free sites.

I want to offer it as part of a membership platform - and don’t want to refer users off my site to a third party site?

I can get the raw data - and I am even open to paying for a synced script to do that if necessary.

Any suggestions would be great.

Thanks - JG

Can you give an example what this script should do exactly?