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Getting Started with Hono

Start accepting x402 payments in your Hono server in 2 minutes.

Example Code

You can find the full code for this example on GitHub.

Step 1: Install Dependencies​

Install the required packages for your Hono server:

npm install x402 hono dotenv @hono/node-server

Step 2: Set Your Environment Variables​

Create a .env file in your project root:

echo "ADDRESS=0x...\nFACILITATOR_URL=https://x402.blockeden.xyz\nNETWORK=sui\nBLOCKEDEN_API_KEY=your_api_key_here" > .env

Your .env file should look like this:

ADDRESS=0x... # wallet public address you want to receive payments to
FACILITATOR_URL=https://x402.blockeden.xyz
NETWORK=sui # recommended for fastest settlement
BLOCKEDEN_API_KEY=your_api_key_here # get from https://blockeden.xyz/dash/
Network Options

BlockEden.xyz supports multiple networks:

  • sui (recommended for fastest settlement)
  • ethereum
  • base
  • polygon
  • avalanche

Step 3: Create a New Hono App​

Create an index.ts file with the following code:

import { config } from "dotenv";
import { Hono } from "hono";
import { serve } from "@hono/node-server";
import { paymentMiddleware, Network, Resource } from "x402-hono";

config();

const facilitatorUrl = process.env.FACILITATOR_URL as Resource;
const payTo = process.env.ADDRESS as `0x${string}`;
const network = process.env.NETWORK as Network;
const apiKey = process.env.BLOCKEDEN_API_KEY;

if (!facilitatorUrl || !payTo || !network || !apiKey) {
  console.error("Missing required environment variables");
  process.exit(1);
}

const app = new Hono();

console.log("Hono server is running on http://localhost:4021");

app.use(
  paymentMiddleware(
    payTo,
    {
      "/weather": {
        price: "$0.001",
        network,
      },
      "/premium/*": {
        price: "$0.01",
        network,
      },
    },
    {
      url: facilitatorUrl,
      apiKey: apiKey,
    },
  ),
);

app.get("/weather", (c) => {
  return c.json({
    report: {
      weather: "sunny",
      temperature: 70,
    },
  });
});

app.get("/premium/content", (c) => {
  return c.json({
    content: "This is premium content",
    timestamp: new Date().toISOString(),
  });
});

serve({
  fetch: app.fetch,
  port: 4021,
});

Step 4: Run the Server​

Start your Hono server:

npx tsx index.ts
Your Hono server is now accepting x402 payments!

Step 5: Test the Server​

You can test payments against your server locally using HTTP clients like curl, Postman, or by building a client application.

Coming Soon

Client implementation guides for fetch API and axios will be available soon.

Payment Configuration Options​

The paymentMiddleware accepts flexible payment configurations:

Simple Dollar Amount​

"/weather": {
  price: "$0.001",
  network: "sui",
}

Route Wildcards​

"/premium/*": {
  price: "$0.01",
  network: "sui",
}

Multiple Routes​

app.use(
  paymentMiddleware(
    payTo,
    {
      "/weather": {
        price: "$0.001",
        network: "sui",
      },
      "/premium/*": {
        price: "$0.05",
        network: "sui",
      },
      "/api/analytics": {
        price: "$0.10",
        network: "sui",
      },
    },
    {
      url: facilitatorUrl,
      apiKey: apiKey,
    },
  ),
);

Advanced Features​

Custom Payment Verification​

Add custom logic when payments are verified:

app.use(
  paymentMiddleware(payTo, paymentConfig, {
    url: facilitatorUrl,
    apiKey: apiKey,
    onPaymentVerified: (c, paymentData) => {
      console.log("Payment verified:", paymentData.txHash);
      // Custom logging, analytics, or business logic
    },
  }),
);

Error Handling​

Add custom error handling middleware:

app.onError((err, c) => {
  if (err.name === "X402PaymentError") {
    return c.json(
      {
        error: "Payment required",
        details: err.message,
      },
      402,
    );
  }
  return c.json({ error: "Internal server error" }, 500);
});

CORS Configuration​

Enable CORS for cross-origin requests:

import { cors } from "hono/cors";

app.use(
  "/*",
  cors({
    origin: process.env.ALLOWED_ORIGINS?.split(",") || [
      "http://localhost:3000",
    ],
    credentials: true,
  }),
);

Production Deployment​

Before deploying to production:

  1. Switch to production network (e.g., sui instead of sui-testnet)
  2. Use environment variables for all sensitive data
  3. Enable HTTPS for your server
  4. Set up proper error logging
  5. Configure CORS for your production domains

Production Example​

import { config } from "dotenv";
import { Hono } from "hono";
import { serve } from "@hono/node-server";
import { cors } from "hono/cors";
import { paymentMiddleware } from "x402-hono";

config();

const app = new Hono();

// Enable CORS for production
app.use(
  "/*",
  cors({
    origin: process.env.ALLOWED_ORIGINS?.split(","),
    credentials: true,
  }),
);

// Apply payment middleware
app.use(
  paymentMiddleware(
    process.env.ADDRESS as `0x${string}`,
    {
      "/api/weather": {
        price: "$0.01",
        network: "sui", // Production Sui network
      },
    },
    {
      url: "https://x402.blockeden.xyz",
      apiKey: process.env.BLOCKEDEN_API_KEY,
    },
  ),
);

// Protected endpoint
app.get("/api/weather", (c) => {
  return c.json({
    report: { weather: "sunny", temperature: 70 },
  });
});

serve({
  fetch: app.fetch,
  port: parseInt(process.env.PORT || "4021"),
});

Troubleshooting​

Common Issues​

Payment verification fails

  • Verify your BLOCKEDEN_API_KEY is correct
  • Check that the wallet address format matches the network
  • Ensure the facilitator URL is accessible

CORS errors

  • Add CORS middleware before payment middleware
  • Configure allowed origins properly

Network mismatch

  • Ensure client and server use the same network
  • Check that the token address is valid for the network

Port already in use

  • Change the port in serve() configuration
  • Kill any existing processes using the port

Why Choose Hono?​

Hono is an excellent choice for x402 payment servers:

  • Ultra-fast: Hono is one of the fastest web frameworks for Node.js
  • Small footprint: Lightweight with minimal dependencies
  • TypeScript-first: Excellent type safety and developer experience
  • Edge-ready: Deploy to Cloudflare Workers, Deno, Bun, and more
  • Express-like API: Easy migration if you're familiar with Express

Next Steps​

Need Help?​

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