[zerogvt]

I don't think so. You need a non-maxed out mainstream credit card (gift cards or prepaids won't work) and still you're locked out of a lot of functionality (e.g. k8s in AWS) unless you are willing to actually pay. Also any trial period comes with an expiration date. That might be a low barrier but it is not a zero one. I know a lot of people that are still out of cloud due to all that.

[pdelgallego]

That is one of the reasons AWS is giving a generous free tier for Lambda (1 million request per month). It is extremely easy to setup, and basically free for toy projects