How to Set Up an Auth0 Custom Domain?

Replace your-tenant.your-region.auth0.com with your own branded login domain! In this tutorial, learn how to configure a custom domain in Auth0 using Namecheap and verify propagation using the terminal.

We will also cover mandatory setup requirements—like credit card authorization—and show you how to update your application environment variables (featuring a Ruby on Rails example).

What You'll Learn:

• Key prerequisites for Auth0 custom domains (Billing setup & session implications)
• Setting up CNAME records in Namecheap
• Verifying DNS propagation directly from your terminal using dig
• Updating app configuration to route authentication traffic through your custom URL

Resources & Links:

• Full blog post - Setting Up Auth0 Custom Domains: A Complete Guide to DNS and SDK Configuration
• Auth0 Custom Domain Documentation