If you work in the technologiy industry, I’m sure you’ve heard of the Daily WTF site. Their fun stories about technology gone wrong makes it one of my favorite web sites.
At Xojo, we work with a lot of HTTP REST APIs. So many in fact that I’ve spent time creating custom test harnesses to make sure that whatever I was currently coding would be compatible as well as being a test suite just in case the API changed in some subtle way (whether it be a bug fix or an API refactor gone awry). The problem with the custom test harnesses is that they’re not very portable and you end up having to create a new one for each API that you interface with.