How do I verify my application for production?
In order to verify your application we need the Application Client ID and the possible
redirect_uri values you will be using with the request authorization flow.
Having a whitelist of values that helps us guard against phishing attacks by controlling where we return authorization codes to for your application.
This Stack Exchange article is a good explanation of why this is necessary: What is the purpose of OAuth 2.0 redirect_uri checking?
We do support wildcards in the host name, but only for subdomains of domains under your control, eg:
Once your application is in production then this also will start billing. The free tier only applies whilst your apps are in development mode. So if you haven’t entered your billing details yet, you’ll need to do that as well before you go live: https://app.cronofy.com/billing
When you’re ready to go, email email@example.com your Application Client ID and
redirect_uri whitelist and we’ll switch you to production mode.