How to implement the display of a page of a third-party site?

Question

Parsing

There are sites (about 100 pieces) that need to display the discount pages of each site on their pages so that when information changes on the sites, the information on the final site changes. I will consider all options. Save, you need to do everything yesterday! Wordpress. Thanks in advance.

Answer 1

it would be cool if the info was issued via the API.
well, and so do a separate parsing for each condition and for each site of
hemorrhoids. but if such a task, then the helm is in your hands

Answer 2

I'm thinking of displaying through a frame. What are your thoughts on this. Faced with the problem of displaying in width, most sites have scrolling.