HTTP 402 Payment Required

x402 for Arbitrum

HTTP-native micropayments for the AI agent economy. Instant, programmatic payments using ARB and stablecoins on Arbitrum.

Try Sandbox Demo
Coming soon
Instant Settlement

Sandbox Demo: API Access

Experience HTTP-native micropayments in action

API Access Portal
Payment Details
Cost: 0.90 ARB
10k queries
1k50k100k
x402 Payment Flow
Real-time protocol visualization
HTTP Request
POST /api/access/graph
402 Payment Required
X-Payment: 0.90 ARB
X-Payment-Address: 0x742d...E891
Payment Sent
Arbitrum Network
Block: #234,567,890
Payment Confirmed
TX: 0x9feab3a46e144
Transaction recorded on Arbitrum
200 OK - API Access Granted
⚡ Instant settlement

How It Works

x402 uses the HTTP 402 status code to enable native payment flows in your API

1. Make Request
Client makes an HTTP request to a paid API endpoint using the x402 SDK
2. Payment Required
Server responds with 402 status code including payment details and wallet address
3. Auto Payment
SDK automatically sends ARB/USDC payment via Arbitrum network
4. Get Response
After payment verification, server returns requested data instantly

Built for the AI Agent Economy

Enabling $30 trillion in autonomous transactions by 2030

AI Agent Economy

Built for autonomous agents making programmatic payments without human intervention

Instant Settlement

Sub-second payment confirmation with Arbitrum's fast finality

HTTP Native

Works with any HTTP client - no blockchain-specific code required

Secure by Design

Cryptographic signatures ensure payment authenticity and non-repudiation

Ready to Build?

Get started with x402 Protocol and enable instant micropayments in your Arbitrum applications

npm install x402-arbitrum-jscargo add x402-arbitrum-rs