I'm more interested in the underlying API than than the node package. Apparently it accesses your profile publicly, so there's no magic here, just an API to construct the right URL. Maybe if it worked with a private diary it might be more useful.
That's true. I've considered the possibility of creating an API based on a headless browser that will allow a user to login and actually make changes to a private diary, but the problem with that approach is that it would blatantly stepping on MFP's terms of service, and would raise red flags with the company as far as potentially compromising secure user data.
That does pose a problem. I guess given the situation this is definitely an improvement, but seeing the underlying workings make it seem pretty easy to implement in other technologies, given the simplicity.