I built something similar about a year ago experimenting with AWS's API Gateway. https://mock.codes/ The landing page is an S3 file, and everything is just API Gateway configs.
There used to be a similar service hosted on the same domain that eventually went dead. I bought the domain and brought up this service again. It barely gets used (haven't checked usage in a while) but I've already paid for the domain and it costs me pennies to keep it up and running.
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I built something similar about a year ago experimenting with AWS's API Gateway. https://mock.codes/ The landing page is an S3 file, and everything is just API Gateway configs.
There used to be a similar service hosted on the same domain that eventually went dead. I bought the domain and brought up this service again. It barely gets used (haven't checked usage in a while) but I've already paid for the domain and it costs me pennies to keep it up and running.