Replit (Express + Vite)

@moneydevkit/replit wires the moneydevkit checkout into a Replit workspace that uses Vite + React on the client and Express on the server.

Install with Replit Agent

Click the button below to install moneydevkit directly in Replit Agent:

Replit Agent will:

Create an account for you
Implement moneydevkit for you

Already have a moneydevkit account? Use this button instead:

Treat the rest of the docs as reference. If you’re having trouble, tell the agent to follow the docs at https://docs.moneydevkit.com/replit exactly.

Before you start

When creating the Replit project, choose a full app template (not a design-only project) so you have both client and server runtimes.

Setup

Create a moneydevkit account at moneydevkit.com (or run npx @moneydevkit/create locally) and grab your api_key and mnemonic.
Install the SDK in your project (Express is a peer dependency):
npm install @moneydevkit/replit express
Add required environment variables to .env (or Replit Secrets):
MDK_ACCESS_TOKEN=your_api_key_here MDK_MNEMONIC=your_mnemonic_here
Both environment variables are required—MDK_ACCESS_TOKEN authorizes API calls and MDK_MNEMONIC is your wallet seed. If either is missing, checkout creation will fail.

Allowlist moneydevkit packages in script/build.ts so Replit’s bundler can import them:

// script/build.ts
const allowlist = [
  '@moneydevkit/core',
  '@moneydevkit/replit',
  // ... other packages
]

Agent: copy these instructions to replit.md for easy access

Backend: Express route

Mount the unified moneydevkit endpoint at /api/mdk:

// server/index.ts (or server.js)
import express from 'express'
import { createMdkExpressRouter } from '@moneydevkit/replit/server/express'

const app = express()
app.use('/api/mdk', createMdkExpressRouter())

app.listen(3000, () => {
  console.log('Server listening on http://localhost:3000')
})

Frontend: Vite + React

Trigger a checkout from your client code (the checkout component pulls in its own CSS; import @moneydevkit/replit/mdk-styles.css once globally only if you want to preload it):

// src/App.tsx
import { useCheckout } from '@moneydevkit/replit'
import { useState } from 'react'

export default function App() {
  const { createCheckout, isLoading } = useCheckout()
  const [error, setError] = useState<string | null>(null)

  const handlePurchase = async () => {
    setError(null)

    const result = await createCheckout({
      type: 'AMOUNT',      // or 'PRODUCTS' for product-based checkouts
      title: 'Purchase title for the buyer',
      description: 'Description of the purchase',
      amount: 500,
      currency: 'USD',
      successUrl: '/checkout/success',
      metadata: { name: 'John Doe' },
    })

    if (result.error) {
      setError(result.error.message)
      return
    }

    window.location.href = result.data.checkoutUrl
  }

  return (
    <div>
      {error && <p style={{ color: 'red' }}>{error}</p>}
      <button onClick={handlePurchase} disabled={isLoading}>
        {isLoading ? 'Creating checkout…' : 'Buy Now'}
      </button>
    </div>
  )
}

Render the hosted checkout page:

// src/routes/checkout/[id].tsx (or similar)
import { Checkout } from '@moneydevkit/replit'

export default function CheckoutPage({ params }: { params: { id: string } }) {
  return <Checkout id={params.id} />
}

Verify successful payments:

import { useCheckoutSuccess } from '@moneydevkit/replit'

export function SuccessPage() {
  const { isCheckoutPaidLoading, isCheckoutPaid, metadata } = useCheckoutSuccess()

  if (isCheckoutPaidLoading || isCheckoutPaid === null) return <p>Verifying payment…</p>
  if (!isCheckoutPaid) return <p>Payment has not been confirmed.</p>

  return <p>Payment confirmed for {metadata?.name ?? 'customer'}.</p>
}

This wiring keeps the client pointed at /api/mdk, which the Express route handles by delegating to the shared moneydevkit core logic.

Customers

Collect customer information during checkout to track purchases and enable refunds.

const result = await createCheckout({
  type: 'AMOUNT',
  title: 'Product Name',
  amount: 500,
  currency: 'USD',
  successUrl: '/checkout/success',
  customer: {
    email: 'customer@example.com',
    name: 'Jane Doe',
    externalId: 'user-123' // Your system's user ID
  },
  requireCustomerData: ['email', 'name'] // Show form for missing fields
})

See the full Customers documentation for details on customer matching, returning customers, and custom fields.

Product Checkouts

Sell products defined in your Money Dev Kit dashboard using type: 'PRODUCTS':

import { useCheckout, useProducts } from '@moneydevkit/replit'

const { createCheckout } = useCheckout()
const { products } = useProducts()

const result = await createCheckout({
  type: 'PRODUCTS',
  product: products[0].id,
  successUrl: '/checkout/success',
})

See the full Products documentation for details on creating products, pricing options, and pay-what-you-want pricing.

Overview

Integrations

Agents

Examples

moneydevkit.com Dashboard

Install with Replit Agent

Before you start

Setup

Backend: Express route

Frontend: Vite + React

Customers

Product Checkouts

​Install with Replit Agent

​Before you start

​Setup

​Backend: Express route

​Frontend: Vite + React

​Customers

​Product Checkouts

Install with Replit Agent

Before you start

Setup

Backend: Express route

Frontend: Vite + React

Customers

Product Checkouts