Returning errors and 404s as plain text by default

[binaryfire]

Hi. I've built a kv store using Framework X that will only be used by scripts. Currently when there's an error or 404, HTML error pages are returned. Is there a way of forcing all error responses to be returned as plain text? I want to avoid having to pass additional headers (eg. for content type) when calling the API to keep things as simple as possible when I use it in scripts.

Thanks!