Billflare Credits Pack

Buy credits → D1 ledger → debit on use · v1.0.0

Stripe secret keyset

Webhook signing secretset

Admin secretset

Customers (D1)1

Ledger entries (D1)2

Credits per pack100

Try it Email Credits to debit Client event id (idempotency) Pack quantity (Checkout)

Results appear here.

Endpoints

POST /api/checkout — one-time Checkout Session for a credit pack
POST /api/credits/debit — idempotent debit (402 if insufficient)
GET /api/credits?email= — balance + recent ledger
POST /api/webhook — Stripe webhooks (SubtleCrypto); credits on checkout.session.completed
GET /api/health — JSON health (secret flags only)
GET /api/admin/ledger — recent rows (X-Admin-Secret)

Different buyer problem than Metered Pack (subscription usage). Prepaid: pay → balance → deduct. Add-on to Billflare spine ($99).