http://i3xi5qxvbrngh3g6o7czwjfxwjzigook7zxzjmgwg5b7xnjcn5hzciad.onion/control-spec/index.html
Auto Light Rust Coal Navy Ayu Tor Specifications TC: A Tor control protocol (Version 1) Scope This document describes an implementation-specific protocol that is used
for other programs (such as frontend user-interfaces) to communicate with a
locally running Tor process. It is not part of the Tor onion routing
protocol. This protocol replaces version 0 of TC, which is now deprecated. For
reference, TC is described in “control-spec-v0.txt”.