Custom domains for hosted online stores
Merchants want the storefront and checkout on their own domain. CustomDomain™ connects it at the merchant's DNS provider.
For founders, onboarding product managers and support leads at commerce platforms such as Shopify, Square Online and BigCommerce.
| Type | Host | Value | State |
|---|---|---|---|
| ALIAS | acme.com | edge.customdomain.ai | live |
| CNAME | www.acme.com | edge.customdomain.ai | live |
What breaks today
| What breaks | What your customer sees |
|---|---|
| Extra A record at the root | Some shoppers land on the old store or a parking page. |
| Leftover AAAA record | IPv6 visitors still reach the previous host. |
| CAA record without Let's Encrypt | Checkout gets no valid certificate, so browsers warn. |
| Cloudflare proxy left on | The certificate cannot issue while the orange cloud is on. |
How CustomDomain™ handles it
| Step | What CustomDomain™ does |
|---|---|
| Finds the provider | Names the merchant's DNS provider and the ways in that work there. |
| Flags extra A and AAAA | Records that would split traffic are listed before anything is written. |
| Adds CAA, never removes | The fix adds a Let's Encrypt CAA record beside the existing ones. |
| Checks each record | Moves to live only when every record resolves to its expected value. |
| Serves HTTPS | Growth and up The edge issues the checkout certificate on the first request. |
| Limit | On Starter and Startup, your own servers serve TLS for the store. |
Where your customers' DNS is hosted
Six common providers and the way in each one offers.
| DNS provider | Way in today |
|---|---|
| Cloudflare | sign in |
| NameSilo | one-click |
| GoDaddy | api key |
| Amazon Route 53 | api key |
| Namecheap | by hand |
| Squarespace | by hand |
Common questions
How does an e-commerce platform give merchants a custom domain?
Embed the widget in your store settings or call the API from your backend. CustomDomain™ finds the merchant's DNS provider, writes or shows the records, and checks each one until the domain is live.
Why do shoppers still see the old store?
An old A or AAAA record is still answering at the root. The check lists both as conflicts, and the fix is to delete them.
Who issues the certificate for checkout?
On Growth and up, the CustomDomain™ edge issues it on the first HTTPS request and renews it. On Starter and Startup, domains point at your own servers and you serve TLS.
Shopify, Square Online, BigCommerce, Cloudflare and other names on this page are trademarks of their owners. CustomDomain™ is not affiliated with or endorsed by them. Facts about other products were read from their public pages on October 30, 2026.
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