While working on a bot utilizing the Numista API I found a coin (N#189098) which the API doesn't return a body to, and the error code is 500. As the API doesn't "recognize" this error there is no body given in the response following the standard error schema. While it is possible to work around responses without a response body, I believe this is unintended behavior and a bug report is filed. I assume this coin is not the only one, it is merely the one I discovered.

Sincerely,
Tor