I've been running a couple of websites* on a home machine behind a Cloudflare tunnel for 2-3 years now. The only thing I had to pay for was the DNS registration. There are limits on the traffic you can serve on their free plan, but I'm nowhere near reaching those. I don't know what an SDK would add, you just set up a web server using whatever method suits you, then configure the cloudflared to connect to that. I did find that the online dashboard could not support all the options I wanted, so I switched to using the config file method - it would have been easier if I used that method from the start.

One caveat - there is an option to inject Javascript into your pages for traffic measurement which is ON BY DEFAULT, you have to go to "Web Analytics" and turn this off if you don't want it!

* https://cmacleod.me.uk & https://newsgrouper.org

That's handled by all the prior releases of cloudflare tunnels

ngrok does this free, but with an account

Anything specific to watch out for?

On what url were those? Or Cloudflare's TOS in general ?

Hm, yeah, depends who you’re marketing this to.

Also, the “0 ports opened” marketing is misleading. It still binds to a port and then also lets people access your resources over it.

I dislike that Cloudflare Engineering has become more… marketingy as of late. Also with their Cloudflare OS misnomer. Their products used to make more sense, what happened?

How many ways can you convey doing the same thing? All the banks out there have almost identical slogans because they do very similar things.

You should be more than hesitant - don’t do it. They literally market them for quick demos. And not long lived production.

I use for the exact same thing. Running "cloudflared tunnel" sets up a temp solution. No log in needed, pretty convenient.