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Next.js 15 guides for self-hosted AI SaaS: Docker, Caddy, Auth.js, Stripe, LangGraph, pgvector, and Hetzner cost.

4 posts in Auth & Stripe

• 28 Oct 2026 · Auth & Stripe

  Designing a Shared Team Credit Pool for AI Workspaces in Next.js 15

  Deduct LLM usage from an organization balance instead of a personal counter, with Prisma, Stripe seats, and a debit that survives retries.

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• 28 Oct 2026 · Auth & Stripe

  Stripe Webhooks in Next.js 15 App Router, Raw Body and Idempotency

  Why stripe.webhooks.constructEvent fails in the App Router, how to read the raw body, and how to store event ids so retries do not double-credit.

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• 28 Oct 2026 · Auth & Stripe

  Next.js 15 Server Actions Authorization, Stopping IDOR

  Server Actions are POST endpoints. How to check the Auth.js session inside the action, reject cross-tenant ids, and share one guard across mutations.

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• 28 Oct 2026 · Auth & Stripe

  Auth.js v5 vs Clerk on Next.js 15, Dropping the Per-MAU Identity Tax

  What Clerk costs as you grow, how Auth.js v5 plus Postgres looks in Docker, and when a hosted identity vendor is still the right call.

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