01
Shop platforms
Sell only what is in their own catalog, so first you migrate your products.
Open source · Built on Cloudflare
Grow your commerce.Not your infrastructure.
The open-source checkout for brands that already own their product data. Cart, tax, shipping, payment and orders, for your storefront and for AI agents.
Apache-2.0 · Runs in your Cloudflare account
demo.orbcart.dev
Your customer sees
Daypack 30 l
Green · Qty 1
- Shipping · Standard
- €4.95
- VAT · DE 19% incl.
- €15.14
Total€94.85
Order placedNG-2026-000142
Behind the scenes
- offers() · your ERP€89.90 · in stock
- VAT · DE 19%€15.14
- Shipping · Standard€4.95
- Stock · 1 unitheld
- Payment · Stripeauthorized
- Order → your ERPNG-2026-000142
- Servers to runRuns on Cloudflare
- 0
- EU countriesVAT at daily EU rates
- 27
- Payment providersKeep your provider
- 5
- Payment methodsFrom cards to TWINT
- 11
Payments through
- Stripe
- Adyen
- Mollie
- PAYONE
- PayPal
Why OrbCart
Your product data already has a home.Checkout shouldn't need a second one.
02
Headless platforms
Still want a copy of your SKUs. Current prices and stock mean sync jobs.
03
Payment checkouts
Take the payment, and some work out tax. Cart, stock holds and orders are still on you.
OrbCart
Asks your own systems for price and stock while people shop. Your catalog stays where it is.
- Catalog copies
- 0
- Sync jobs
- 0
- Function to write
- 1
How it works
Built around the systems you already run.Your ERP keeps the last word on price and stock.
- 01
Write one function.
offers()asks your ERP or PIM for prices and stock while a customer shops. - 02
Set the rules once. Tax, shipping and promotions are worked out on the server, for your shop and for agents.
- 03
Deploy to your Cloudflare account. One Worker. Each cart is its own Durable Object, stored in the EU by default.
- 04
Start selling. Your storefront, the React checkout kit and AI agents share one checkout. Paid orders go to your ERP.
Built in today
The parts you would otherwise build and maintain yourself.
Cart and checkout
Address, contact and consent on one page
VAT by destination
All 27 EU countries, daily rates
Shipping rules
Per country, with exclusions
Payments
Five providers, local methods
Express checkout
Apple Pay, Google Pay and PayPal
Refunds
Single lines or one piece of a set
Stock holds
Held in your own inventory system
Order handover
Sent to your ERP, retried until it arrives
Promotions
End a sale in every open cart at once
Checkout kit
React components and hooks
Admin API
Orders and refunds, server side
Local runtime
orbcart dev on your machine
On the roadmap: invoice payments in Germany, then Unzer.Project status
Developers
One function connects your catalog.Everything else is typed configuration.
Prices come from your API. Swap
erp.articles(lines)for a call to your own system.OrbCart needs four fields. SKU, name, price and tax category. Variants, sets and the rest stay in your system.
Configuration lives in code. Payment methods, tax and shipping per market, in
channels, reviewed like any other change.
import { defineCommerce } from "@orbcart/runtime";import { channels } from "./channels";import { erp } from "./erp";export * from "@orbcart/runtime/objects";export default defineCommerce({channels,offers: async (lines, { currency }) => {const articles = await erp.articles(lines);return articles.map((article) => ({reference: article.sku,title: article.name,price: { amount: article.cents, currency },taxCategory: "standard",shipping: { weightInGrams: article.grams },tags: article.promotions,}));},});import { CartProvider, Checkout, useShoppingCart } from "@orbcart/react";import "@orbcart/react/styles.css";<CartProvider commerce={commerce} token={token} onCartChange={saveCart}><App /></CartProvider>;export function AddToBag({ reference }: { reference: string }) {const { add } = useShoppingCart();return <button onClick={() => add(reference)}>Add to bag</button>;}export function CheckoutPage() {const { cart } = useShoppingCart();if (!cart) return null;return <Checkout cart={cart} locale="en-GB" onOrdered={showReceipt} />;}import { createCommerce } from "@orbcart/client";const commerce = createCommerce({ url, key });const cart = await commerce.cart();await cart.add("BACKPACK-30-GREEN");const quote = await cart.quote({contact: { email: "anna@example.com" },shipTo: {name: "Anna Berg",line1: "Bergstraße 12",postalCode: "10115",city: "Berlin",country: "DE",},});const payment = await quote.mountPayment("card", field);const result = await quote.pay({ payment });if (result.status === "ordered") showConfirmation(result.order.number);POST /ucp/checkout-sessions HTTP/1.1Host: commerce.nordgrat.deContent-Type: application/jsonContent-Digest: sha-256=:JUV3e2z40UNI5nFLuNE431Mkt9AwPe0i+Kh8KkvDCN0=:UCP-Agent: profile="https://agent.example/.well-known/ucp"Signature-Input: sig1=("@method" "@authority" "@path" "content-digest" "content-type" "ucp-agent");created=1791538860;keyid="agent-2026"Signature: sig1=:…:{"line_items": [{ "item": { "id": "BACKPACK-30-GREEN" }, "quantity": 1 }],"buyer": { "email": "anna@example.com" },"fulfillment": {"methods": [{"type": "shipping","destinations": [{"first_name": "Anna","last_name": "Berg","street_address": "Bergstraße 12","postal_code": "10115","address_locality": "Berlin","address_country": "DE"}],"groups": [{ "selected_option_id": "standard" }]}]}}Response
201 Created
POST /v1/carts/{cart}/quote{"object": "quote","id": "qt_ZpG1HEl1QmxOSB5FHEs0xI9t86HRUDeC_Ysm9kUzOg8","cart": "cart_01M4G0HN30K4R8W2N6Q9XB3M5T","channel": "de","currency": "EUR","pricesIncludeTax": true,"expiresAt": "2026-10-09T09:56:00.000Z","lines": [{"id": "l_1","reference": "BACKPACK-30-GREEN","quantity": 1,"offer": {"title": "Daypack 30 l, green","price": {"amount": 8990,"currency": "EUR"}},"taxes": [{"percentage": "19","country": "DE","taxCategory": "standard","taxableAmount": {"amount": 7555,"currency": "EUR"},"amount": {"amount": 1435,"currency": "EUR"}}]}],"shipping": {"id": "standard","type": "delivery","title": "Standard shipping (DHL)","price": {"amount": 495,"currency": "EUR"},"deliveryTime": "2-4 business days"},"totals": {"subtotal": {"amount": 8990,"currency": "EUR"},"shipping": {"amount": 495,"currency": "EUR"},"discount": {"amount": 0,"currency": "EUR"},"tax": {"amount": 1514,"currency": "EUR"},"total": {"amount": 9485,"currency": "EUR"}},"signature": "eyJhbGciOiJFUzI1NiIsImtpZCI6…"}{"object": "quote","id": "qt_ZpG1HEl1QmxOSB5FHEs0xI9t86HRUDeC_Ysm9kUzOg8","cart": "cart_01M4G0HN30K4R8W2N6Q9XB3M5T","channel": "de","currency": "EUR","pricesIncludeTax": true,"expiresAt": "2026-10-09T09:56:00.000Z","lines": [{"id": "l_1","reference": "BACKPACK-30-GREEN","quantity": 1,"offer": {"title": "Daypack 30 l, green","price": { "amount": 8990, "currency": "EUR" }},"taxes": [{"percentage": "19","country": "DE","taxCategory": "standard","taxableAmount": {"amount": 7555,"currency": "EUR"},"amount": {"amount": 1435,"currency": "EUR"}}]}],"shipping": {"id": "standard","type": "delivery","title": "Standard shipping (DHL)","price": { "amount": 495, "currency": "EUR" },"deliveryTime": "2-4 business days"},"totals": {"subtotal": { "amount": 8990, "currency": "EUR" },"shipping": { "amount": 495, "currency": "EUR" },"discount": { "amount": 0, "currency": "EUR" },"tax": { "amount": 1514, "currency": "EUR" },"total": { "amount": 9485, "currency": "EUR" }},"signature": "eyJhbGciOiJFUzI1NiIsImtpZCI6…"}
POST /v1/carts/{cart}/lines{"object": "cart","id": "cart_01M4G0HN30K4R8W2N6Q9XB3M5T","channel": "de","version": 2,"lines": [{"id": "l_1","reference": "BACKPACK-30-GREEN","quantity": 1,"status": "available","offer": {"title": "Daypack 30 l, green","price": {"amount": 8990,"currency": "EUR"}}}],"missing": ["ship_to", "email"],"estimate": {"currency": "EUR","pricesIncludeTax": true,"totals": {"subtotal": {"amount": 8990,"currency": "EUR"},"discount": {"amount": 0,"currency": "EUR"},"shipping": {"amount": 0,"currency": "EUR"},"total": {"amount": 8990,"currency": "EUR"}},"excludes": ["shipping"]}}{"object": "cart","id": "cart_01M4G0HN30K4R8W2N6Q9XB3M5T","channel": "de","version": 2,"lines": [{"id": "l_1","reference": "BACKPACK-30-GREEN","quantity": 1,"status": "available","offer": {"title": "Daypack 30 l, green","price": { "amount": 8990, "currency": "EUR" }}}],"missing": ["ship_to", "email"],"estimate": {"currency": "EUR","pricesIncludeTax": true,"totals": {"subtotal": { "amount": 8990, "currency": "EUR" },"discount": { "amount": 0, "currency": "EUR" },"shipping": { "amount": 0, "currency": "EUR" },"total": { "amount": 8990, "currency": "EUR" }},"excludes": ["shipping"]}}
POST /v1/quotes/{quote}/accept{"object": "acceptance","status": "ordered","payment": {"object": "payment","id": "pay_01M4G0HN30K4R8W2N6Q9XB3M5T_1","quote": "qt_ZpG1HEl1QmxOSB5FHEs0xI9t86HRUDeC_Ysm9kUzOg8","amount": {"amount": 9485,"currency": "EUR"},"method": "card","provider": "stripe","status": "authorized"},"order": {"object": "order","id": "ord_01M4G0HN30K4R8W2N6Q9XB3M5T","number": "NG-2026-000142","channel": "de","orderedAt": "2026-10-09T09:42:10.000Z","fulfillment": "unfulfilled","refunds": "none","handoff": "pending"}}{"object": "acceptance","status": "ordered","payment": {"object": "payment","id": "pay_01M4G0HN30K4R8W2N6Q9XB3M5T_1","quote": "qt_ZpG1HEl1QmxOSB5FHEs0xI9t86HRUDeC_Ysm9kUzOg8","amount": { "amount": 9485, "currency": "EUR" },"method": "card","provider": "stripe","status": "authorized"},"order": {"object": "order","id": "ord_01M4G0HN30K4R8W2N6Q9XB3M5T","number": "NG-2026-000142","channel": "de","orderedAt": "2026-10-09T09:42:10.000Z","fulfillment": "unfulfilled","refunds": "none","handoff": "pending"}}
POST /ucp/checkout-sessions{"id": "cart_01M4G0HN30K4R8W2N6Q9XB3M5T","status": "ready_for_complete","currency": "EUR","line_items": [{"id": "l_1","item": {"id": "BACKPACK-30-GREEN","title": "Daypack 30 l, green","price": 8990},"quantity": 1,"totals": [{"type": "subtotal","amount": 8990},{"type": "total","amount": 8990}]}],"totals": [{"type": "subtotal","amount": 8990},{"type": "fulfillment","amount": 495},{ "type": "total", "amount": 9485 }],"expires_at": "2026-10-09T09:56:00.000Z","continue_url": "https://demo.orbcart.dev/de/checkout/continue?handoff=…","quote": {"id": "qt_ZpG1HEl1QmxOSB5FHEs0xI9t86HRUDeC_Ysm9kUzOg8"},"ap2": {"merchant_authorization": "eyJhbGciOiJFUzI1NiIsImtpZCI6…"}}{"id": "cart_01M4G0HN30K4R8W2N6Q9XB3M5T","status": "ready_for_complete","currency": "EUR","line_items": [{"id": "l_1","item": {"id": "BACKPACK-30-GREEN","title": "Daypack 30 l, green","price": 8990},"quantity": 1,"totals": [{ "type": "subtotal", "amount": 8990 },{ "type": "total", "amount": 8990 }]}],"totals": [{ "type": "subtotal", "amount": 8990 },{ "type": "fulfillment", "amount": 495 },{ "type": "total", "amount": 9485 }],"expires_at": "2026-10-09T09:56:00.000Z","continue_url": "https://demo.orbcart.dev/de/checkout/continue?handoff=…","quote": {"id": "qt_ZpG1HEl1QmxOSB5FHEs0xI9t86HRUDeC_Ysm9kUzOg8"},"ap2": {"merchant_authorization": "eyJhbGciOiJFUzI1NiIsImtpZCI6…"}}
Reliability
Things go wrong at checkout.Your customers shouldn't have to sort it out.
A payment provider stops answering, a sale ends while someone pays, an address changes inside Apple Pay. Here is what OrbCart does in each case.
Measured in Stripe's sandbox · 25 September 2026
- 0.00 sA customer pays €94.85 by card.Your customer sees: Paying
- 0.76 sStripe takes the payment, but the response is lost.Your customer sees: Payment pending
- 30 sOrbCart assumes nothing and asks Stripe again.Your customer sees: Payment pending
- 30.96 sStripe answers: authorized.Your customer sees: Order placed
At Stripe: one PaymentIntent, captured once.
Illustrative · Ending a sale from your backend
- CheckoutA customer is checking out the daypack at €79.90.Your customer sees: Sale €79.90
- MidnightYou end the sale with one API call.Your customer sees: Sale €79.90
- PayThey press Pay. OrbCart checks the price first.Your customer sees: New price €89.90
- PaidThey see the new price, €89.90, and confirm it.Your customer sees: Paid €89.90
Nobody is charged a price they did not see.
Illustrative · Express checkout with Apple Pay
- OpenA customer opens Apple Pay: €94.85 to Germany.Your customer sees: Total €94.85
- AddressThey switch to Vienna. OrbCart recalculates for Austria.Your customer sees: Total €99.85
- ApproveThey approve. The full address changes nothing.Your customer sees: Paying
- PaidOrbCart charges exactly the amount they approved.Your customer sees: Paid €99.85
The charge always matches what Apple Pay showed.
Illustrative · A partial refund from your backend
- PaidA customer pays €296.10 for a tent set, 10 % off.Your customer sees: Paid €296.10
- ReturnOnly the groundsheet comes back.Your customer sees: Return sent
- RefundYou refund just that piece with one API call.Your customer sees: Refund pending
- RefundedOrbCart refunds its share, discount included.Your customer sees: Refunded €45.00
Right to the cent, discount included.
Edge and agents
No servers to scale for a busy day.And AI agents can check out, too.
A busy day is just more carts. Each cart is its own object in your Cloudflare account, stored in the EU by default.
$ wrangler deploy✓ commerce · Worker✓ CartObject · one per cart- Open cart
- Ordered
Each box is one cart
AI agents check out like customers do. They get your storefront's prices and rules, plus a quote signed by your shop that they can check.
Shopping assistant@orbcart/client
Order the green 30 l daypack and send it to my home.
cart.add("BACKPACK-30-GREEN")cart.quote({ shipTo, contact })
Daypack 30 lGreen
€89.90- Shipping
- €4.95
- Total incl. VAT
- €94.85
verifyQuote(quote, jwks)VerifyingVerifiedOrdered. €94.85 including shipping and VAT. Order NG-2026-000141.
UCP checkoutOpen checkout protocol
AP2 mandatesPayments the customer approved
Questions
Worth askingbefore you switch.
Project statusDo we have to move our catalog?
No. You write one function, offers(), that asks your ERP, PIM or pricing service for price and stock when a customer needs them. Nothing is copied, so there is nothing to keep in sync.
Will it work with our storefront?
If your storefront can call an API, yes. Use the React checkout kit, the client for any framework, or plain HTTP with the OpenAPI description. AI agents check out through the same API.
Where does it run, and where is our data?
In your own Cloudflare account, as one Worker. Each cart is stored on its own, in the EU by default. There is no OrbCart server in between.
Which payment providers can we use?
Stripe, Adyen, Mollie, PAYONE and PayPal, with local methods such as Klarna, iDEAL, Bancontact and TWINT, and Apple Pay and Google Pay as express checkout. Moving a method to another provider is a one-word change in the configuration.
Does it handle VAT?
For all 27 EU countries, from the EU's daily rates. Places outside EU VAT, such as Heligoland, are caught by postal code. For Switzerland, Norway, the UK and anywhere else, you plug in your own tax function.
How do AI agents buy from us?
Through UCP, an open checkout protocol. The customer approves on your checkout page, or ahead of time with an AP2 mandate in the agent's app. The agent gets a quote signed by your shop and can check it before paying.
What does it cost?
The software is free and open source under Apache 2.0. You pay Cloudflare for hosting and your payment provider for transactions, as you use them. There is no paid plan today.
Can we go live with it today?
Not yet. OrbCart is pre-release: it is not on npm and the repository is not public yet. The demo shop shows where things stand, and the project status page lists what works today.
Try a purchase yourself.
The demo shop runs on OrbCart in test mode. Put something in the bag and check out, or read the docs and connect your own data.