Push Chain x402

x402 Payment Protocol Demo

HTTP 402 on Push Chain Blockchain

API Response

Click "Make Request" to test the x402 payment flow

Ready to Test

This demo will test the x402 payment flow by making a request to a protected resource. The x402 SDK will automatically handle the payment when a 402 response is received.

✓ Using server-side payment processing with BUYER_PRIVATE_KEY from environment variables. No wallet approval needed.

🆕 New SDK Features

Use Network Preset

Uses 'push-testnet' preset (simplifies config)

Use Builder Pattern

Fluent API: X402ClientBuilder.forTestnet().withWallet().build()

Debug Mode

Enable detailed logging (check browser console)

Use Browser Wallet

Wallet extension not detected

Use Universal Transaction

Pay from Ethereum Mainnet or Sepolia — assets bridged automatically to Push Chain

💳 Payment Options

Native Token (PUSH)

Pay with native Push Chain token

ERC20 Token

Pay with any supported ERC20 token

REQUEST HEADERS

{ "X-PAYMENT": "Not sent" }

How x402Axios works

Initial Request: Tries to access resource (no payment)
402 Response: Server responds with 402 Payment Required and payment details
Automatic Payment: x402Axios intercepts the 402, processes payment via facilitator contract
Retry with Proof: Automatically retries the original request with payment proof in X-Payment header
Resource Delivered: Server verifies payment and returns the protected resource