You are right. But even you don’t use a mocking tool, if your backend makes some backward incompatible changes without informing frontend team, then you’ll immediately get some troubles in production(if you don’t have some integration tests). In my case, updating mocks is not very hard if you have a real endpoint. Just get a response from api, copy-and paste to a file. But, maybe integration with raml or swagger specifications or a simple way to generate some simple mocks would be a good feature for a mocking library. I’ll think about that.