How to Monetize Your Web App with Crypto Payments (USDT, BTC, etc.)

Introduction

With the rise of cryptocurrencies, integrating crypto payments into web applications offers businesses faster transactions, lower fees, and global reach. This guide will show you how to accept Bitcoin (BTC), Ethereum (ETH), USDT, and other cryptocurrencies using MetaMask, Stripe Crypto, and third-party APIs.

What You’ll Learn

✔ How to integrate MetaMask for Ethereum-based payments
✔ How to use Stripe Crypto for simple crypto transactions
✔ How to implement Web3.js and Ethers.js for blockchain payments
✔ How to process payments in Bitcoin, USDT, and stablecoins

1. Choosing the Right Crypto Payment Method

There are several ways to accept crypto payments in a web app:

1.1 Using MetaMask for Ethereum & ERC-20 Payments

Best for decentralized apps (dApps)

Supports ETH, USDT, DAI, and ERC-20 tokens

Works directly with smart contracts

1.2 Using Stripe Crypto for Mainstream Payments

Best for e-commerce and traditional businesses

Supports USDC, BTC, ETH, and stablecoins

Fiat conversion available

1.3 Using Payment Gateways like CoinGate or NowPayments

Accepts multiple cryptocurrencies

Auto-converts crypto to fiat (USD, EUR, NGN, etc.)

API integration for easy checkout

1. Accepting Crypto Payments with MetaMask (Ethereum & ERC-20 Tokens)

Step 1: Install Web3.js or Ethers.js

npm install web3 ethers

Step 2: Connect MetaMask to Your Web App

Modify App.js:

import { useState } from "react";
import { ethers } from "ethers";

function App() {
  const [account, setAccount] = useState("");

  async function connectWallet() {
    if (window.ethereum) {
      const provider = new ethers.providers.Web3Provider(window.ethereum);
      const accounts = await provider.send("eth_requestAccounts", []);
      setAccount(accounts[0]);
    } else {
      alert("MetaMask not detected");
    }
  }

  return (
    <div>
      <button onClick={connectWallet}>Connect Wallet</button>
      <p>Connected Account: {account}</p>
    </div>
  );
}

export default App;

1. Sending Crypto Payments with MetaMask

Step 1: Create a Send Payment Function

async function sendCrypto(recipient, amount) {
  if (!window.ethereum) return alert("MetaMask not detected");

  const provider = new ethers.providers.Web3Provider(window.ethereum);
  const signer = provider.getSigner();

  const tx = await signer.sendTransaction({
    to: recipient,
    value: ethers.utils.parseEther(amount),
  });

  await tx.wait();
  alert("Transaction successful!");
}

Step 2: Add a Payment Button

<button onClick={() => sendCrypto("0xRecipientAddress", "0.01")}>
  Pay with Crypto
</button>

1. Accepting Bitcoin & Stablecoins Using Stripe Crypto

Step 1: Sign Up for Stripe

Go to Stripe Crypto

Get your API keys

Step 2: Install Stripe SDK

npm install @stripe/stripe-js

Step 3: Create a Payment Button

Modify App.js:

import { loadStripe } from "@stripe/stripe-js";

const stripePromise = loadStripe("YOUR_STRIPE_PUBLIC_KEY");

async function handlePayment() {
  const stripe = await stripePromise;
  const response = await fetch("/create-checkout-session", {
    method: "POST",
  });

  const session = await response.json();
  const result = await stripe.redirectToCheckout({ sessionId: session.id });

  if (result.error) {
    alert(result.error.message);
  }
}

return <button onClick={handlePayment}>Pay with Stripe Crypto</button>;

Step 4: Backend Route for Checkout Session

Modify server.js:

const express = require("express");
const Stripe = require("stripe");
const app = express();

const stripe = new Stripe("YOUR_STRIPE_SECRET_KEY");

app.post("/create-checkout-session", async (req, res) => {
  const session = await stripe.checkout.sessions.create({
    payment_method_types: ["card", "crypto"],
    line_items: [
      {
        price_data: {
          currency: "usd",
          product_data: { name: "Crypto Payment" },
          unit_amount: 1000,
        },
        quantity: 1,
      },
    ],
    mode: "payment",
    success_url: "https://your-site.com/success",
    cancel_url: "https://your-site.com/cancel",
  });

  res.json({ id: session.id });
});

app.listen(3000, () => console.log("Server running on port 3000"));

1. Accepting Multiple Cryptocurrencies with Payment APIs

If you want to accept BTC, ETH, USDT, BNB, and other cryptos, use platforms like:

CoinGate (coingate.com)

NowPayments (nowpayments.io)

Example API Request for NowPayments

curl -X POST https://api.nowpayments.io/v1/invoice \
-H "x-api-key: YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
  "price_amount": 50,
  "price_currency": "usd",
  "pay_currency": "btc",
  "order_id": "12345",
  "order_description": "Crypto Payment"
}'

1. Converting Crypto to Fiat

To convert received crypto into USD or NGN, use:
✔ Binance Pay – Auto-converts payments to fiat
✔ Coinbase Commerce – Crypto payments with fiat withdrawal
✔ BitPay – Accepts BTC & USDT, converts to USD/EUR

1. Deploying the Web App

Step 1: Deploy to Vercel or Netlify

npm run build
vercel deploy

Step 2: Deploy Backend on Railway or Render

git push heroku main

Conclusion

We successfully implemented crypto payments using:
✔ MetaMask for Ethereum & ERC-20 tokens
✔ Stripe Crypto for mainstream businesses
✔ NowPayments & CoinGate for multiple currencies
✔ Fiat conversion solutions like Binance Pay & BitPay

Adding crypto payments can make your app global, secure, and future-proof.

💡 I'm open for collaboration! If you’re working on a crypto payment integration, dApp, or Web3 project, let’s connect and build something amazing! 🚀

Crypto #Web3 #Ethereum #Bitcoin #Stripe #MetaMask #EthersJS