AgentBoiler.

AgentBoiler is a production-ready FastAPI + Next.js + LangChain template for AI agent SaaS applications. You buy it once, you self-host on your own infrastructure, you ship your product in hours instead of weeks.

Why this exists

Every AI side-project starts the same way: a beautiful idea, then four weeks of YAML, three decisions about session storage, and one regretful hand-rolled webhook handler. By week three you’re knee-deep in Stripe webhook signatures and you’ve forgotten why you were excited.

We extracted the plumbing from real production AI agent deployments - auth, multi-tenant billing, RAG, streaming, observability - into a single template you buy once. The boring scaffolding is already done. Just ship your product.

What you get

The template ships with the parts of an AI agent SaaS that every project needs:

Backend. FastAPI 0.135+ with async PostgreSQL, JWT auth, repository-service architecture, Alembic migrations, Redis caching, Celery background tasks. Production patterns, not toy code.

AI agents. LangChain + LangGraph agent wired with WebSocket token streaming, tool calling and conversation persistence. Token-level credit metering with per-model pricing for OpenAI, Anthropic and Google.

RAG pipeline. Milvus vector store with hybrid BM25 + vector search and reranking. PDF / DOCX / MD / TXT parsers (pyMuPDF, LiteParse, LlamaCloud). Scheduled Google Drive and S3 / MinIO sync sources. Per-organization scoped retrieval.

Multi-tenant billing. Stripe Checkout + Customer Portal, hybrid subscription + credits model, per-organization quotas, anomaly detection. Webhooks with signature validation already wired.

Admin. Pre-built dashboard with users, organizations, subscriptions, Stripe events, usage, audit log. Impersonate, suspend, refund.

Frontend. Next.js 15 + Tailwind v4 + shadcn/ui, i18n (English + Polish), dark + light themes, streaming chat UI with optimistic patterns.

DevOps. Docker Compose for dev / stage / prod, production Nginx reverse-proxy config (WebSocket + SSL), GitHub Actions CI (ruff, pytest + coverage, Playwright, pip-audit, Trivy), Sentry + LangSmith + structured logging.

The principles

Ship the boring parts. Auth, billing, observability - wired and tested so you can focus on what makes your product different.

Defaults that age well. Typed APIs, repository-service split, async everywhere. We pick conventions that hold up at scale.

Production-tested, not perfect. Every choice was made under load in real deployments. When there’s no clean answer, we ship the one least likely to bite you in week six.

AI as a tool, not a goal. RAG, agents, streaming - first-class but optional. Build calm products that happen to use AI well.

What this isn’t

AgentBoiler is not a tutorial. Not a starter template. Not a SaaS subscription. Not a no-code platform. Not a vendor lock-in trap.

It’s the actual scaffolding code we ran in production, packaged so you can run it too. Commercial license. Lifetime access to the version you bought. Self-host anywhere that runs Docker.

Support

Pre-purchase questions: hello@agentboiler.com. Post-purchase support: email (Basic) / founder Discord with 48-hour SLA (Extended) / dedicated SLA + private Discord channel (Custom).

If the basic install isn’t working after purchase, we offer a free 30-minute debug call. We’d rather fix it than have you frustrated.