Vending Machine Payments
Multi-chain crypto payments (Base USDC / BSC USDT) with QR codes and backend monitoring.
Features: EIP-681 payment URIs, QR code scanning, MetaMask integration, on-chain
verification with eth_getLogs polling, HMAC-signed receipts
x402 Paywall Systems
Cryptocurrency-powered content access with USDC payments on Base.
Live Paywall: Facilitator + RPC verification with embedded video
Video Paywall: RPC-only verification with R2 storage and Range support
NFT Minting with USDC Payment
Pay-to-mint NFT system: pay USDC on Base, get an NFT with custom inscription.
Features: On-chain payment verification, automatic NFT minting, custom inscription text
(max 512 chars), anti-replay protection
x402 Demo: Uses x402 protocol for payment verification and settlement
Vending Machine Dashboards
Monitor and manage vending machine devices, orders, and statistics.