Sellbase

An open source Shopify alternative you drop into your existing project, run by your AI agent.

Add products, a cart, Stripe checkout and an admin to the Next.js, React or plain HTML site you already have, on the Supabase you already use, with one command: npx sellbase init. Also included: orders, inventory, abandoned carts, discounts, appointments, emails, an API and an MCP server.

Quick start · Features · Docs · Deploy · Contributing · Español

Why Sellbase

• Yours, end to end. Your data lives in your Postgres, your money goes to your Stripe account and your code stays in your repo. There is no platform fee, no lock-in and no Sellbase servers in between. MIT licensed.
• AI-first. sellbase init writes CLAUDE.md/AGENTS.md, skills and an MCP server. Tell your agent "set up my store" and it creates products, connects payments and runs a test purchase. Money and destructive actions always ask the owner first, and everything is logged.
• Works on any site.
  • Next.js and Vite + React: React components.
  • Plain HTML, WordPress, Webflow, Vue, Svelte, Astro, Angular: <sellbase-*> web components (13 KB gzipped) and a static admin.
• An admin that is a pleasure to use. Products with drag and drop photos and variants, inventory, orders with packing slips and refunds, abandoned cart recovery, customers, discounts and settings for every connection. Also:
  • a command palette (⌘K) to search and act;
  • an AI copilot on Home;
  • built for store owners, not developers.
• Safe by default.
  • Money stored as integers.
  • RLS on every table, with tests.
  • Orders only come from verified payment webhooks.
  • Idempotent writes.
  • Third-party secrets in Supabase Vault.
  • Signed outbound webhooks that never reach private networks.

Sellbase or build it yourself?

The usual way to add a store to a Next.js + Supabase app is to write it by hand: a products table, a cart, a Server Action for Stripe Checkout and a webhook route. It works for the first sale. Sellbase is that same stack (your Supabase and your Stripe) with the rest already built and tested.

Unlike engines such as Medusa, Vendure or Saleor, Sellbase needs no separate backend server. It runs on Supabase Edge Functions next to your app, and the storefront components are copied into your repo for you to edit.

Quick start

Requirements: Node 20+ and a Supabase project (or the local stack with Docker).

npx supabase start          # local stack (or pass --supabase-url … for a hosted project)
npx sellbase init --yes     # schema, Edge Functions, store, owner, admin, components, agent files

Then:

• Admin: open /admin and sign in. Locally, the owner's email and password are in .env.sellbase.
• Setup: follow the setup guide on Home.
• Or let your agent do it: open it in the project and say "Configura mi tienda con Sellbase" / "Set up my store with Sellbase". It uses the sellbase MCP tools until a test purchase succeeds.

npx sellbase doctor         # checklist with the next step for anything missing
npx sellbase upgrade        # new versions: dry run, backup, migrations, functions, components

Start from a template

npx sellbase create my-store --template nextjs   # Next.js store with the admin at /admin
npx sellbase create my-landing --template html   # plain HTML landing page, no build step

Both are in examples/ with Vercel and Netlify deploy buttons.

With Claude Code

/plugin marketplace add jlgavel011/sellbase
/plugin install sellbase@sellbase
/sellbase:setup I sell handmade candles, $250 MXN each, shipping $120

The plugin brings the Sellbase skills and MCP server to every project. /sellbase:setup installs Sellbase, creates your products, connects Stripe in test mode and runs a test purchase. Any other MCP client can use npx sellbase mcp (listed in the MCP registry as io.github.jlgavel011/sellbase).

With any agent (Cursor, Codex, Copilot, Gemini CLI, Windsurf…)

npx skills add jlgavel011/sellbase    # the Sellbase skills, including add-ecommerce

Then ask your agent to "add a store to this project". The add-ecommerce skill installs Sellbase and sets it up.

With shadcn

The storefront components are also a shadcn-compatible registry:

npx shadcn add https://jlgavel011.github.io/sellbase/r/store.json          # everything
npx shadcn add https://jlgavel011.github.io/sellbase/r/product-grid.json   # or one component

They still need the backend: npx sellbase init --yes. The index is at /r/registry.json.

Going live: deploy guide and live payments with Stripe.

Features

Catalog:

• physical products, digital downloads and services with appointments;
• up to 3 options per product (size, color…) with a variant matrix, compare-at prices and SEO;
• collections, tags and stock per variant;
• CSV import (including Shopify exports) and export;
• bulk price changes with a preview.

Checkout:

• Stripe Checkout (cards, Apple Pay, Google Pay; test and live mode);
• shipping rates, free shipping thresholds and local pickup;
• inclusive or exclusive taxes;
• discount codes and automatic discounts;
• deposits for services;
• a required consent checkbox (e.g. 18+ for alcohol) enforced by the server and stored with the order.

Orders:

• payment and fulfillment statuses;
• shipping with carrier and tracking;
• full or partial refunds;
• cancellations with restock;
• a timeline with comments;
• printable packing slips;
• manual orders (cash, transfer, WhatsApp) and payment links.

Growth:

• abandoned checkouts with one-click or automatic recovery emails that restore the cart;
• customers with their history;
• sales metrics and best sellers.

Services:

• resources with weekly hours and exceptions;
• availability;
• bookings with reminders (24 h and 2 h before) and calendar invites.

Emails (Resend): order confirmation with download links, shipping updates, refunds, cancellations, appointment notices and cart recovery. All of them carry your logo and brand color.

Team and AI:

• staff roles and invitations;
• API tokens with scopes for agents (money and data export scopes are opt-in);
• an activity log;
• signed outbound webhooks with retries for your ERP, spreadsheets or Zapier.

Storefront:

• React components copied into your repo (edit freely);
• headless hooks;
• web components for any site;
• SEO helpers (JSON-LD, sitemap);
• order lookup and download pages;
• accessible markup (checked with axe).

How it works

your site ──(@sellbase/react or <sellbase-*> web components)──┐
/admin (@sellbase/admin) ─────────────────────────────────────┤
your AI agent ──(sellbase MCP server)─────────────────────────┤
                                                              ▼
                    Supabase: Edge Functions (sellbase-api, -webhooks, -jobs)
                              Postgres schema `sellbase` (RLS) · Vault · Storage · pg_cron
                                                              │
                                   Stripe · Resend · your webhooks

• One API contract. Every route is declared once with Zod in @sellbase/core. The Hono server validates with it, the OpenAPI spec and the typed SDK come from it, and the MCP tools reuse it.
• Snapshots. Orders keep a copy of prices, titles and addresses, so later catalog changes never alter past orders.
• The outbox. Business events are written in the same transaction as the change; jobs deliver emails and webhooks from it.

Documentation

• Getting started (español)
• Add an ecommerce store to a Next.js app with Supabase (en español)
• Deploy to production
• Customize the admin
• Live payments with Stripe (español)
• API reference, plus llms.txt and llms-full.txt for agents
• Specification and architecture decisions
• Changelog

Development

pnpm i
pnpm exec supabase start && node scripts/seed-demo.mjs
pnpm dev                    # playground on http://localhost:3100 (admin at /admin)
pnpm lint && pnpm typecheck && pnpm test
pnpm test:db                # pgTAP
pnpm test:integration       # API against the local database
pnpm test:e2e               # Playwright
node scripts/acceptance.mjs # clean project → init → agent over MCP → test purchase

See CONTRIBUTING.md. Security issues: SECURITY.md.

Status

Sellbase is 0.3, young but complete. The full flow is covered by CI on every commit:

• pgTAP;
• API integration;
• Playwright end to end;
• a clean-install acceptance test with a real agent over MCP.

Next on the roadmap:

• an installation guide per hosting provider;
• more payment providers (Mercado Pago, OXXO via Stripe);
• shipping label integrations;
• invoicing (CFDI).

En español

Sellbase es un kit de comercio open source que se instala dentro de tu proyecto (tu repo y tu Supabase) y que tu agente de IA puede configurar y operar.

Qué incluye:

• catálogo con fotos y variantes;
• checkout con Stripe;
• pedidos, inventario y carritos abandonados;
• descuentos, citas y correos;
• un admin completo en /admin;
• una API y un servidor MCP.

Funciona en Next.js, Vite + React y en cualquier sitio (HTML puro, WordPress, Webflow…) con componentes web.

npx supabase start
npx sellbase init --yes

Después entra a /admin (en local, el usuario y la contraseña quedan en .env.sellbase) o dile a tu agente: "Configura mi tienda con Sellbase".

Guías: primeros pasos, cobrar de verdad con Stripe y despliegue.

License

MIT