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A custom domain gives your app a professional, branded web address that’s easy to share and remember. Connect a domain you already own from any provider.
Custom domains are available on Moon plans and above.

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Connect a domain you already own

1

Open the publish options

Open your app and click Publish. In the Publish Your App popup, you’ll see your default app URL (for example, video-generator.buildaispace.app).Publish Your App popup showing the option to add a custom domain
2

Add your domain

Click + Custom domain below the default URL and enter your domain:
  • A subdomain on buildai.space: enter just the prefix (for example, yourapp) and BuildAI adds .buildai.space. No DNS setup is needed.
  • Your own domain or subdomain (for example, yourdomain.com or app.yourdomain.com): add a DNS record at your domain provider, as in the next step.
3

Add the DNS record at your provider

Sign in to your domain provider and add the record for your domain type:The @ symbol stands for your root domain. Each domain type is explained below, followed by step-by-step instructions for popular providers.
4

Verify

DNS changes usually take 5–15 minutes, but can take up to 48 hours. Return to the publish options and click Refresh next to your domain. When you see “Valid Configuration”, your domain is live.

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Which DNS record do you need?

A subdomain on buildai.space (for example, yourapp.buildai.space) Enter just the subdomain prefix (for example, yourapp). BuildAI automatically appends .buildai.space and manages everything for you. No DNS configuration is needed. A subdomain on your own domain (for example, app.yourdomain.com) Add a CNAME record: Replace app with your chosen subdomain prefix if it’s different (for example, www or tools). A full (root) domain (for example, yourdomain.com) Add an A record: The @ symbol represents the root domain itself.
  1. Log into your GoDaddy account.
  2. Navigate to My Products → Domains, choose your domain, and click DNS.
  3. Click Add to create a new DNS record.
  4. Select the appropriate Record Type (CNAME or A).
  5. Enter the Name and Value as shown in the tables above.
  6. Set TTL to 1 hour.
  7. Save your changes.
  1. Log into Cloudflare and select your domain.
  2. Go to the DNS tab.
  3. Click Add record.
  4. Choose the correct Record Type (CNAME or A).
  5. Enter the Name and Value as shown in the tables above.
  6. Set Proxy status to DNS only (gray cloud icon).
  7. Save the record.
  1. Log into your Namecheap account.
  2. Go to Domain List, find your domain, and click Manage.
  3. Navigate to the Advanced DNS tab.
  4. Click Add New Record.
  5. Select the correct Record Type.
  6. Fill in the Host (Name) and Value fields as shown in the tables above.
  7. Set TTL to Automatic.
  8. Save your changes.
  1. Log into your domain registrar or DNS provider dashboard.
  2. Locate the DNS management or domain settings section.
  3. Add the DNS record exactly as shown in the tables above.
  4. Save your changes.

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Quick DNS reference

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Troubleshooting and tips

  • Subdomains on buildai.space need no DNS setup. Just enter the prefix and BuildAI handles everything.
  • Subdomains on your own domain (for example, app.yourdomain.com) need a CNAME record pointing to cname.vercel.pub.
  • Root domains need an A record pointing to 76.76.21.21.
  • DNS settings missing or unclear? Contact your domain provider’s support for help.
  • “Invalid Configuration” shows up? Wait a bit longer for DNS to propagate and click Refresh again.
  • New to custom domains? A subdomain on buildai.space is the quickest way to get a branded URL live without managing DNS.

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Manage domains bought through BuildAI

If you bought or claimed a domain through BuildAI, go to Settings → Domains to see it:
  • Renewal status: when it renews and for how much, or how long it stays active after a cancelled renewal.
  • Manage renewal: opens the billing portal to update your card or cancel the renewal.
  • DNS records: view and edit the domain’s DNS. Records BuildAI created for your app and email are flagged, so you don’t take your app offline by accident.
If a renewal payment fails, we’ll email you before the domain stops working. Update your card from Manage renewal to keep it live.

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FAQ

Do I get SSL (HTTPS)? Yes. Every custom domain gets a free SSL certificate automatically once it points at your app. My domain still shows my old site, or “Invalid Configuration” won’t go away. Remove any other A or CNAME records for the same name at your provider. A leftover record from a previous host can override the new one. Then wait a few minutes and click Refresh again. I use Cloudflare and the domain won’t verify. Set the record’s proxy status to DNS only (gray cloud). The orange-cloud proxy hides the record BuildAI needs to see. Can I connect a subdomain instead of my root domain? Yes. Add a CNAME record for the subdomain (for example, app for app.yourdomain.com) pointing to cname.vercel.pub. Can I use the domain for email too? Yes. Once your domain connects, the custom email sender can send from it. For domains bought through BuildAI, the required DNS records are added for you. What happens if I stop paying for a bought domain? Your domain stays active until the end of the period you’ve paid for. Then it expires and eventually returns to the open market. We email you before that happens. What if the name can’t be registered after I pay? It’s rare. A name can be taken in the moment between your checkout and the registration. You’ll see a message saying we couldn’t register it, our team is alerted automatically, and we sort out your payment. Contact support if you’d like an update or want to pick a different name straight away. How many domains can one account have? Ten on Moon, twenty on Spaceship, and forty on Galaxy. Bought and connected domains count together. Can I move a domain to another app? Each domain connects to one app. Contact support if you need to move it.