CartAI — The AI Agent That Handles Checkout
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Live · Launching on Product Hunt soon<br>The AI agent that handles checkout.<br>One API to deploy a specialized agent that navigates any web property and completes the transaction — checkout, subscription sign-up, invoice payment, order submission, anywhere a transaction has to happen. Automate it. Embed it, or enable it on surfaces that never had it. Composable. Reliable. Developer-first.<br>Start buildingRead the docs<br>checkout.tswebhook.ts<br>// POST https://api.cartai.ai/checkout<br>const response = await fetch("https://api.cartai.ai/checkout", {<br>method: "POST",<br>headers: {<br>"Content-Type": "application/json",<br>"Authorization": `Bearer ${process.env.CARTAI_KEY}`,<br>},<br>body: JSON.stringify({<br>customer: {<br>email: "buyer@example.com",<br>name: "Jane Doe",<br>},<br>tasks: [{<br>target: "bestbuy.com/site/sony-wh-1000xm5/6505727.p",<br>variant: { color: "black" },<br>shipping: { profile: "./buyer.json" },<br>payment: { profile: "./card.json" },<br>}],<br>options: { sandbox: true },<br>}),<br>});
const { taskId, status } = await response.json();<br>// → taskId: "task_abc123", status: "queued"<br>// Execution runs async — listen via webhook for completion.// Webhook listener — subscription lifecycle events<br>import express from "express";
const app = express();<br>app.use(express.json());
app.post("/webhooks/cartai", (req, res) => {<br>const { event, data } = req.body;
switch (event) {<br>case "STARTED":<br>notify_customer(data.customerId);<br>break;<br>case "COMPLETED":<br>send_post_purchase_flow(data.customerId);<br>break;<br>case "FAILED":<br>do_retry(data.customerId, data.executionId);<br>break;
res.sendStatus(200);<br>});
app.listen(3000);<br>Surfaces supported<br>Any web property.<br>If a workflow has to navigate it, CartAI can transact through it.<br>All e-commerce checkouts<br>Custom carts<br>Intranet portals<br>Vendor portals<br>Login-gated workflows
The categoryA specialized layer at a specialized intersection.<br>Browser automation and agentic payments are both vast, important categories. Neither is built specifically for the workflows where a transaction has to actually clear. CartAI is.<br>Browser automation<br>Tools that navigate the open web<br>General-purpose web automation. Built to handle any task — research, scraping, form-filling, data extraction, navigation across the open web.<br>Scope: the universe of browser-based tasks. Transactional reliability is one slice of a much broader remit.
Programmable transactions, made reliable<br>AI-driven browser execution and payment infrastructure fused into a single primitive. Built specifically for workflows where a transaction has to clear — and not built for workflows where one doesn't.<br>Scope: specialized by design. The constraint is the moat.
Agentic payments<br>Authentication and payment rails for agents<br>The identity, trust, and rails layer that lets agents transact safely on behalf of users — KYA, signed credentials, agent-issued payment instruments.<br>Scope: the rails that make agentic payments trustable. Pairs with an execution layer that can navigate to the payment.
Both adjacent categories solve real problems. CartAI solves the one between them: the transaction has to clear. A specialist primitive built for that single, non-negotiable outcome.
The moatAnyone can navigate. Few can clear a transaction.<br>The hard part isn't the click. It's everything between the click and the confirmation. We engineered three pieces into the primitive — the ones that have to be right or the transaction silently fails.<br>01
Composable workflows<br>Built for every shape a transaction can take.<br>Every flow has its own shape — some need shipping, some don't; some need 3DS, some don't; some need login, some don't. CartAI workflows assemble the steps your specific situation requires, while always landing somewhere transactional.<br>Composable step primitives<br>Conditional branching<br>Idempotent, retry-safe
02
PCI-compliant payment stack<br>Card intake, vaulting, and agentic protocols — built right.<br>Full PCI-compliant credit card intake and vaulting, integrated with the agentic payment protocols the next generation of transactions will run on.<br>PCI DSS compliant intake<br>Tokenized card vaulting<br>Agentic protocol support
03
Cooperative bot-mitigation<br>Cleared, not flagged.<br>We don't evade Cloudflare, Human, or Fingerprint — we cooperate with them via Web Bot Auth, Skyfire KYA, and signed agent identity. Transactions clear cleanly through the same trust infrastructure that protects the world's largest merchants.<br>Web Bot Auth signed identity<br>Skyfire KYA integration<br>Cloudflare / Human / Fingerprint
Proof, not slidesTransactions that cleared.<br>Below: workflows that ended in confirmed orders. Same API, same SDK, same primitive. Recorded against production merchant surfaces — not staged, not simulated.
Cleared<br>BestBuyElectronics
Cleared<br>NeweggElectronics
Cleared<br>JomashopLuxury
Cleared<br>UltaBeauty
The platformOne primitive. Four products.<br>Checkout is the hard part we solve, and the wedge everything else sits on. Four products cover the full transaction...