Validation
Starter
For early customer validation and small operational automation.
$29.00 /month
- 1 base account
- Core automation
- Email support
- Monthly usage report
PAYPAL · PADDLE Review pricing
Review pricing
before checkout
For the first global sales test, KYS starts with payment providers that do not require a fixed setup fee. Choose a plan and continue with PayPal or Paddle.
PLANS
Plans
Prices can be adjusted by deployment configuration. Test the payment flow in sandbox before production.
Recommended
Growth
For teams with recurring work and growing automation needs.
$79.00 /month
- Up to 3 users
- Priority support
- Enhanced operation report
- Basic integration support
Scale
Business
For customer operations, data control and payment reconciliation.
$199.00 /month
- Up to 10 users
- Operation health report
- Priority request queue
- Payment/reconciliation support
POLICY
Payment policy
Static pages contain only public configuration. Final payment confirmation, duplicate prevention and license issuance must be handled by a server that verifies provider webhooks.
Payment methods
The MVP uses PayPal and Paddle only. Toss Payments is excluded because it requires initial/annual fees.
Refunds and cancellations
Digital-service refunds are reviewed by usage state and payment-provider records. Duplicate payments are corrected against the original transaction.
Tax and receipts
Paddle can be operated as Merchant of Record. PayPal transactions are checked through PayPal records.
License
Before production automation, payment approvals are reviewed manually. Automatic license issuance belongs to the webhook-server stage.
SECURITY
Security before production
This page validates the checkout flow. Real SaaS access must trust only server-verified events, not browser messages.
- Do not expose PayPal secrets, Paddle API keys or webhook secrets through PUBLIC_ environment variables.
- Confirm paid status only after verifying PayPal/Paddle webhook signatures on the server.
- Production SaaS access needs an internal DB for customers, subscriptions, payment events and license state with idempotency keys.