Where can I find automated cert request/retrieval requirements?

[cpu]

Hi @Mxyxptlik,

@Mxyxptlik

Is there any documentation that I could use as a guide for developing my own client?

The best documentation for writing an ACME v2 client is the draft RFC. You will also probably want to subscribe to the API announcements category of the forum.

@Mxyxptlik

I’m developing a consumer product that includes an embedded webserver

Will your consumer product support automatic updates? I strongly recommend you don't ship an ACME client or use Let's Encrypt certificates if you aren't able to regularly update the software on the consumer product. There are API changes and deprecations of challenge types that could easily break certificate renewal in the future without updates.