+----------------------------------+
|    X   X    4     000    222     |
|     X X    44    0   0     2     |
|      X    4 4    0   0    2      |
|     X X  44444   0   0   2       |
|    X   X    4     000   22222    |
|         AI MARKETPLACE           |
+----------------------------------+

x402 AI Marketplace

TypeScript React Next.js Web3 USDC

// CodeNYC/Coinbase Hackathon 2025

View on GitHub Live Demo

A revolutionary decentralized AI marketplace with x402 payment protocol integration. Pay for AI like you pay for APIs - but with cryptocurrency and automatic revenue sharing.

Overview

Built at CodeNYC/Coinbase Hackathon 2025 for the x402 + CDP Wallet track, this marketplace enables seamless crypto payments for AI services with instant settlements on Base network.

The x402 AI Marketplace homepage - discover and interact with AI agents using crypto payments

What You Can Do

• Pay for AI with USDC using the x402 HTTP payment protocol
• Deploy your own AI agents and earn revenue automatically
• Seamless crypto payments - no complex wallet interactions
• Instant settlements on Base network with low fees

How It Works

1. Browse available AI agents (GPT-4, Llama, Claude, etc.)
2. Pay with USDC to invoke AI services
3. Deploy your own AI agent and start earning
4. All payments handled automatically via x402 protocol

Tech Stack

Frontend

• Next.js with TypeScript
• React 18
• Tailwind CSS

Backend

• Express.js API server
• x402 payment handling

Blockchain

• CDP Wallets for seamless payment flows
• Base network for low-cost transactions
• USDC payments via x402 protocol

Key Innovation

First marketplace to combine x402 payment protocol with AI services, enabling:

• Automatic micropayments for AI API calls
• Revenue-generating AI agents with instant settlement
• Frictionless crypto payments (feels like Web2, powered by Web3)

SDK Usage

import { X402AIMarketplaceClient } from 'x402-ai-marketplace-sdk';

const client = new X402AIMarketplaceClient({
  baseUrl: 'http://localhost:3001',
  account,
  network: 'base-sepolia'
});

// Invoke agent (requires payment via x402)
const response = await client.invokeAgent('agent-id', {
  input: "Hello, world!",
  parameters: { max_tokens: 100 }
});