Simplest Serverless Function provider (FaaS)

Hi all, what's the simplest platform to deploy serverless functions on that would give a http/s endpoint as part of the deployment?

So far Cloudflare Wrangler is the simplest in my opinion. Firebase Functions does this too. Others such as AWS Lambda and Google Functions seem a bit more complicated to setup.

My interest is in rapidly developing prototypes using serverless functions rather than having to setup an API server.