Getting Started with A2A X402

A2A (Agent-to-Agent) X402 is a revolutionary payment protocol built on Solana that enables seamless, autonomous transactions between AI agents.

What is A2A X402?

A2A X402 combines the HTTP 402 Payment Required status code with Solana's high-performance blockchain to create a standardized way for AI agents to automatically handle payment transactions.

Key Features

**Instant Payments**: Sub-second transaction processing on Solana

**AI-Native**: Designed specifically for AI agent interactions

**Low Fees**: Minimal transaction costs on Solana network

**Developer Friendly**: Simple SDK and comprehensive tooling

**Secure**: Built-in security features and audit trails

Quick Installation

bash

# Install the A2A SDK
npm install @a2a/x402-sdk

# Or using yarn
yarn add @a2a/x402-sdk

Install the A2A SDK

npm install @a2a/x402-sdk

Or using yarn

yarn add @a2a/x402-sdk

Your First A2A Payment

javascript

import { A2AClient } from '@a2a/X402-sdk'

// Initialize client
const client = new A2AClient({
  network: 'devnet', // or 'mainnet'
  privateKey: process.env.SOLANA_PRIVATE_KEY
})

// Create a payment
const payment = await client.createPayment({
  recipient: 'Bs7D8zq7cKk5J4vN8fK2X9gH3pL6mR4eT8wQ5sA9cB2x',
  amount: 0.01, // SOL
  memo: 'AI service payment'
})

console.log('Payment ID:', payment.signature)

import { A2AClient } from '@a2a/X402-sdk'

// Initialize client

const client = new A2AClient({

network: 'devnet', // or 'mainnet'

privateKey: process.env.SOLANA_PRIVATE_KEY

})

// Create a payment

const payment = await client.createPayment({

recipient: 'Bs7D8zq7cKk5J4vN8fK2X9gH3pL6mR4eT8wQ5sA9cB2x',

amount: 0.01, // SOL

memo: 'AI service payment'

})

console.log('Payment ID:', payment.signature)

Documentation

External Resources