402.md
>_ For Developers

Ship in 5 Minutes.
Not 5 Weeks.

Install a lightweight SDK, register your skill, set your price. 402.md handles payment verification, escrow, settlement, refunds, and analytics — so you can focus on building.

Start BuildingRead the Docs
>_ Integration

Three Steps to Go Live

Install the SDK

Add @402md/gateway to your server or embed @402md/checkout on your site. One package, one line of config.

npm install @402md/gateway
// or
<script src="402md-checkout.js">

Register Your Skill

Create a skill on 402.md — set your name, commerce mode, pricing, and endpoints. Upload a SKILL.md for agent discovery.

POST /developers/me/skills
{
  "name": "my-saas",
  "mode": "TICKET",
  "category": "ANALYTICS"
}

Accept Payments

Agents discover your skill, pay with USDC, and receive your product or service. You get 97% settled to your wallet automatically.

// Agent pays → 402.md verifies
// Your API/product delivers
// 97% settles to 0x1a2b...
→ Revenue on autopilot
>_ SDKs

Choose Your Integration

Server-side middleware for APIs, embeddable widget for websites, or React components for modern apps.

@402md/gateway

Server-side middleware for Node.js, Express, Fastify, and Next.js. Intercepts requests, verifies payments, and proxies to your API.

npm install @402md/gateway
Best for: Server-side API monetization

@402md/checkout

Lightweight JS widget (~30KB) with QR code and WalletConnect support. Embed on any website — no framework required.

<script src="checkout.402.md/v1">
// or
npm install @402md/checkout
Best for: Any website or storefront

@402md/checkout-react

React components including <CheckoutButton> and useCheckout() hook. Drop-in components for React and Next.js apps.

npm install @402md/checkout-react
Best for: React / Next.js applications
>_ Revenue

Keep More of What You Earn

3% platform fee. Zero chargebacks. Instant settlement. No hidden costs.

402.md97% to you
Stripe97% to you (minus chargebacks)
RapidAPI70% to you
$0Chargebacks
~0sSettlement
$0.001Gas (we cover)
>_ Dashboard

Everything in One Place

Manage skills, monitor transactions, handle refunds, and track settlements — all from a single dashboard.

Real-Time Analytics

Transaction volume, revenue, error rates, and health checks per skill — updated in real time.

Order Management

Track orders across all commerce modes. View checkout sessions, fulfillment status, and buyer details.

Refund Control

Issue full or partial refunds during the hold period. No third-party disputes — you decide.

Settlement History

See every payout to your wallet. Filter by date, skill, or status. Export for accounting.

Your first agent payment is 5 minutes away

Sign up, register a skill, and start earning. No credit card, no approval process.

Start BuildingView Pricing