Error 400 calling SP2013 rest api

Question

I'm trying to execute a simple GET request against SharePoint 2013 rest endpoint, but for some reason it returns an error code 400 and says:

"Request Error: The server encountered an error processing the request. See server logs for more details".

It says "see server logs", but there are no mentions of "error" and "exception" keywords in the standard SP logs at _C:\Program Files\Common Files\microsoft shared\Web Server Extensions\15\LOGS_

Also this message is shown regardless of which api based url I'm trying to query.

Any thoughts how I could troubleshoot that?

Answer 1

Well, I found a solution eventually. For some reason a reinstall of the WCF Data Services 5.6 solved the problem. Seems it was broken somehow.