Ship a service that takes Korean payments today

What's inside

The parts you rebuild for every service

All six work today. Try them in the demo, and if you like what you see, you get the same code.

• Payments

  Recurring and one-off payments through PortOne. Webhooks are never trusted as-is — the server re-checks with the provider, and a repeated webhook is applied only once.

  • Billing-key subscriptions
  • Webhook signatures
  • Partial refunds
• Sign-in

  Google, Kakao and email magic links together. Sessions live in the database so they can be revoked instantly, and abuse limits are built in.

  • Social sign-in
  • Database sessions
  • Account linking
• Email

  Receipts, expiry notices and marketing mail through Resend and React Email. Every send is logged, and the consent rules are enforced in code.

  • Consent tracking
  • Send log
  • React Email
• AI

  The server calls the provider with the service's own key. Responses stream, and the plan's usage limit is checked before the call — so cost has a ceiling.

  • Streaming
  • Usage limits
  • OpenAI · Anthropic
• Admin area

  Users, payments, refunds and a config check in one place. Non-admins get a 404, and promotion happens only through a server script.

  • Config check
  • Payment lookup
  • Refunds
• Korean compliance

  Terms, a privacy policy, tax-inclusive pricing and the business details payment providers check. Company name and address come from one config file.

  • E-commerce disclosures
  • Total-price display
  • Seller registration