I just deployed an Apex REST service to production and noticed something strange when trying to access it. When calling the URL with my Rails app, I received the error: "Could not find a match for URL /v.9/quickquiz/results/today". Strange because the URL worked in my sandbox and there was no difference in the code. I tried with the Apigee Console with the same results. Hmmm....
I was only able to access the URL after I "Ran All Tests" in the org. Check out the debug below.