Domain SDK
Guides

Custom domain implementation guides

Build secure SaaS custom-domain workflows with practical TypeScript guides for setup, DNS, polling, persistence, testing, and troubleshooting.

These implementation guides show how to turn Domain SDK's provider-independent API into a complete custom-domain workflow for a multi-tenant SaaS application. Start with the settings-page guide, then follow the focused guide for the part of the lifecycle you are building.

Build the workflow

Build a custom-domain settings page

Add and remove customer domains

Display DNS records correctly

Store domain state

Poll until active

Handle edge cases safely

Troubleshoot pending DNS

Troubleshoot certificate issuance

Handle apex domains and subdomains

Give tenants managed subdomains

Secure tenant domain operations

Configure production credentials

Switch providers safely

Test without external API calls

Install Domain SDK for TypeScript

Install the server-side TypeScript SDK and start managing SaaS customer domains with Vercel, Cloudflare, Railway, Render, or Netlify.

Build a custom-domain settings page

Connect an authenticated tenant endpoint to Domain SDK without exposing credentials.

On this page

Build the workflowHandle edge cases safely