If you need this sort of thing in any other language, there's a free, no-auth, no-api-key-required, no-strings-attached API that can do this at https://jina.ai/reader/
I've actually used this and it's not perfect, there are websites (mostly those behind Cloudflare and other such proxies) that it can't handle, but it does 90% of the job, and is an one-liner in most languages with a decent HTTP requests library.
You just fetch a URL like `https://r.jina.ai/https://www.asimov.press/p/mitochondria`, and get a markdown document for the "inner" URL.
I've actually used this and it's not perfect, there are websites (mostly those behind Cloudflare and other such proxies) that it can't handle, but it does 90% of the job, and is an one-liner in most languages with a decent HTTP requests library.