Stripe + NextAuth in One Day: Integration Checklist

TL;DR: Day-one auth is sign-in + protected routes + user records. Day-one payments are one Stripe Checkout flow + a webhook that marks the order paid. Everything else is phase two.

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Founders often bundle "full billing platform" into an MVP. That is how 24-hour builds become 24-day builds. Here is the checklist we actually ship.

Auth (NextAuth / Auth.js)

• Email + password or Google OAuth (pick one for v1)
• JWT sessions for edge middleware (no DB session lookups on every page)
• user_id on every project request — no email-only ownership
• Protected routes: /request, /dashboard, admin ops path
• Safe callbackUrl handling — block open redirects

Payments (Stripe)

• One Checkout Session per order (deposit or full tier price)
• Metadata: requestId, tier, customer email
• Webhook: checkout.session.completed → mark project paid
• Success URL includes session_id — never trust UUID alone
• Admin-only checkout creation for custom quotes

What we defer

• Subscriptions, invoices, coupons, tax automation
• Customer portal for self-serve billing
• Multiple payment methods beyond Checkout defaults
• Refund UI (webhook handler only until ops needs it)

Test before launch

1. Sign in → submit request → pay fixed tier
2. Webhook replay in Stripe dashboard → status becomes paid
3. Wrong user cannot open another customer's payment or dashboard project
4. Custom quote: admin sets price → customer approves → checkout

Ship with us

Fixed tiers (Spark, Launch, Scale) include this stack by default. Sign in to start or read how to prepare your request.