It's not open-source (nor open-weight): https://huggingface.co/nanonets/Nanonets-OCR-s/discussions/2

At Software Heritage, we listed 380M public repositories, 280M of which are on Github: https://archive.softwareheritage.org/

Repository search is pretty limited so far: only full-text search on URLs or in a small list of metadata files like package.json.

> but github may have a feed of new repos anyway?

Yes: https://docs.github.com/en/rest/repos/repos?apiVersion=2022-... (you can filter to only show repositories created since a given date).

> So, I tell the server to drop traffic from the IPs that were scraping. Problem solved! Then immediately I start seeing a large number of attempts from different IPs. Residential IPs in the US: they're buying residential proxies.