So yes Tyk doesn’t overwrite 404 since it’s not part of a certain API. I am not sure how to make try to return 404 for recognisable APIs so not sure we even have such use case. Anyway, Tyk should probably overwrite 404s even if it’s not under a certain api and I created this bug that clarifies it. Please feel free to comment on it why do you think it’s important and what is your use case.