Zotero's documentation covers this to some degree:
https://www.zotero.org/support/dev/exposing_metadata
Of the options laid out there, the information on embedding metadata is probably most relevant -- you should able to simply embed COinS in the search results in order to get a solid experience. You might also need to send the update event as mentioned there, since the contents of the webpage update without a reload. While it would also be rather easy to write a custom site translator for this site (especially if you add the update event), it would be better to leverage COinS if possible, since that would also give automatic support for other research tools as well (some listed here
https://en.wikipedia.org/wiki/COinS).
If I were writing this tool, I would also put a link to download individual sources in RIS or BibTeX format on the item detail popups, simply to broaden compatibility with research tools like Endnote that have less advanced support for pulling useful data directly from the browser window.