You might be able to build something like that in serverless, if you wanted to: https://blog.cloudflare.com/introducing-websockets-in-workers/ https://blog.clou

You might be able to build something like that in serverless, if you wanted to: https://blog.cloudflare.com/introducing-websockets-in-workers/ https://blog.cloudflare.com/introducing-websockets-in-worker... (and updated keep-open pricing in https://blog.cloudflare.com/workers-pricing-scale-to-zero/ https://blog.cloudflare.com/workers-pricing-scale-to-zero/) Or here's a writeup about writing a proxy in Node: https://sensepost.com/blog/2015/another-intercepting-proxy/ https://sensepost.com/blog/2015/another-intercepting-proxy/