Caterpillar Proxy - The simple web debugging proxy (formerly, php-httpproxy)
https://github.com/gnh1201/caterpillar
https://github.com/gnh1201/caterpillar-plugins
See also
Fediverse
Stateful mode
Invoke Method
Wayback
Use cases
Build a network tunnel using Python and the LAMP(PHP) stack.
K-Anonymity for Spam Filtering: Case with Mastodon, and Misskey