LE API server documentation

Client dev
1

Hi,
I would like to write a custom PHP LE client, but I can’t find LE API server (https://acme-v01.api.letsencrypt.org/directory) documentation.

I tried to google it but only found server API flow and client documentation. (LE and certbot)

Can someone point me to the right documentation please?

2

Let’s Encrypt uses protocol called ACME and they are in progress of implementing standards-based ACME v2.

This file should help you: https://github.com/letsencrypt/boulder/blob/release/docs/acme-divergences.md