Subscription billing

Closku uses Polar for subscription checkout and its customer portal. An account owner starts checkout or opens the portal from the signed-in dashboard. Starter, Growth, and Scale have monthly and yearly options; Enterprise uses agreed custom terms.

The dashboard also supports buying extra usage credits for eligible subscribed merchants. Follow the availability and terms shown in the account rather than treating a credit balance as a widget-request field.

Read current pricing and Billing and plans for amounts and included allowances.

Checkout and portal routes require a signed-in merchant session with the owner role. They are dashboard actions. Do not expose account cookies, payment tokens, or privileged credentials in a storefront integration.

Polar sends signed events to Closku's own billing endpoint. Closku verifies the signature before synchronizing subscriptions or processing credits. Credit purchases are applied from confirmed paid-order events with a matching provider customer/merchant association and a valid amount; order creation alone does not credit the balance. Verified refund events reverse the associated order credits. These provider-to-Closku events do not subscribe your application to merchant outbound webhooks.

The widget submission path reads local entitlement. Active, trialing, or applicable grace-period state determines access. If a checkout succeeded but the account has not reflected it, keep the confirmation and contact support rather than repeating payment.

The widget can return HTTP 402 with merchant_not_entitled_for_try_on when access is unavailable. Check dashboard status and checkout or portal messages. Plan-change timing, renewal dates, taxes, and final amounts follow the actual account terms; this guide does not promise an immediate change or a usage reset on upgrade.