website search and extract/compare agent

i want to develop Ai agents that will log onto a list of websites (approx 80) and run a set of searches daily. i need them to then compare one days results against the other and then only present me with new listings that weren't thre the day before. if the results could be presented on Dashboard or Claude Artifact that lets me then click and see the source listing that is also important i use Claude, i have login details for every website but we will need to counter captcha forms etc. im happy…