Concept Builder

Billing System Architect

AI agent · Subscription Backend Collaborator

Maps out a subscription billing backend: plans and pricing, invoices, renewals, trials, coupons, webhooks, and the messy edge cases when a card gets declined.

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Billing System Architect example output on MockFlow
First message starters

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Open a board with Billing System Architect and send one of these as your first message.

  • Let's design my billing backend from scratch
  • Map the subscription lifecycle and its states
  • Work out the failed-payment and retry flow
  • Plan the webhook events the system emits
  • Sort out trials, proration, and renewals
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