Wrote some notes on creating Dial https://julienblanchard.com/posts/dial-tcp-and-tls-for-mac-os-9.html
Dial is a small TCP library for Mac OS 9 and CodeWarrior 6. Mostly a wrapper around OpenTransport and BearSSL.
Grab the static libs I published earlier at https://julienblanchard.com/files.html. Add BearSSL and Certificates and it does TLS, add cJSON and you can do all kind of webshit without a proxy :)