Cool project! This is something I would totally use if I worked on a project that interacts with Bitcoin's blockchain.
How do you install it? Is it on npm or am I supposed to just copy the file? Also, since this seems to be a wrapper for an API, what are the rate limits of the API?
Thanks! Yes, simply copy the file into your project. It has no dependencies and is fully self-contained.
Indeed, it is a wrapper for Blockstream's Esplora API. I am not sure about their rate limits, though. Will try to find it out.
Also, publishing it on npm is a good idea!