StarwispPricing

Docs · Connect

Resend

Email for your apps. Needed only if your app sends email.

Resend sends your apps' email (sign-in codes and notices) and receives replies to your support address. Needed only if your app sends email.

Time: about 10 minutes, plus waiting for DNS. Needs: a domain you own (for example acme.com) and access to its DNS.

No domain? Skip this page. App email stays off: apps have no address of their own, support and privacy contacts are your own email, and sign-in codes come from Supabase's built-in sender. That sender only delivers to members of your Supabase organization, a few emails an hour, which is fine for trying an app yourself. For outside testers who sign in by email, add a domain and set up Resend.

Steps #

  1. Sign up at https://resend.com.
  2. Open https://resend.com/domains → Add domain. Use a subdomain such as apps.acme.com and turn on Receiving. A subdomain keeps your own mail on acme.com untouched.
  3. Add the DNS records Resend shows to your DNS (in Cloudflare if that is where your domain lives, or use Resend's Cloudflare auto-configure). Wait for the status to become Verified.
  4. Open API Keys → Create API Key. Name it starwisp. Permission: Full access (it reads domains and creates each app's inbound webhook).
  5. Copy the key. It starts with re_.

Least privilege: Full access is what the factory needs today. Use an account dedicated to Starwisp and send only to people who opted in.

Where it goes #

Console → Settings → Vault → card Resend:

FieldValue
API keythe key (secret AUTH_SMTP_RESEND_API_KEY)
Sending domainyour domain, for example acme.com (AUTH_SMTP_FROM_DOMAIN)

Also set Settings → Identity → App email domain (for example apps.acme.com). Click Test now.

You should now see a passing test on the card.

What it gates #

Email in your apps (backend and launch stages), including sign-in codes by email.

What it costs #

Estimates from Resend's public pricing: Free is $0 for 3,000 emails a month and 100 a day, with 3 domains. Pro is $20 a month. The 100-a-day limit is reached early if many people request sign-in codes.

Slow prerequisites #

Domain verification: minutes to hours, sometimes longer (the time is not published; this is unverified). It must finish before email works. You can do other setup while you wait.

Rules to know #

Resend requires opt-in recipients and watches complaint and bounce rates. Do not send marketing email to people who did not ask.

Plain-text version of this page: /docs/vendors/resend.md. This page is copied from the product's own docs, so it matches the release you install.

Next: Supabase