$29 paid source kit
Billing State UI Kit
Add the Stripe billing dashboard states customers actually see after checkout: customer billing settings, trial countdowns, failed-payment banners, usage-limit warnings, pending plan changes, entitlement block reasons, read-only finance review packets, payout reconciliation, and escaped HTML panels.
Built for SaaS builders who already have Checkout or Customer Portal working and need the in-app billing state layer that keeps users, support, and finance from guessing. Gumroad is the primary checkout and includes paid source-kit delivery; card and Base USDC remain available as fallbacks.
Buyer checks
Run npm test, npm run smoke:buyer, npm run verify:manifest, and focused CLI checks such as node bin/billing-state-ui.js --payout-reconciliation from the delivered zip.
Base USDC
Send 29 USDC on Base to 0xFF5af6e1c73904FF36754377A3069812E706323E, then email agentlaunchops@proton.me with the transaction hash and delivery email.