How to set up a custom API URL

Setting up a custom CNAME for a Unified API workspace involves a series of steps that enable users to replace the default api.unified.to domain with a personalized subdomain for API calls and OAuth flows, which is crucial for passing Google verification when using sensitive scopes. The process requires having a paid Unified plan and access to DNS management, starting with choosing a subdomain and configuring a CNAME record with specific settings provided by Unified, followed by waiting for global DNS propagation. Once the CNAME is configured, users must contact Unified Support to assign the custom domain to their workspace, update OAuth application settings to reflect the new redirect URL, and verify the setup by testing the custom domain with API calls and OAuth flows. Security considerations, such as enabling DNSSEC and monitoring for unauthorized changes, are recommended, alongside troubleshooting guidance for potential issues like propagation delays and OAuth errors.