PromoXchange is a next-generation decentralized marketplace for trading digital coupons and gift cards. Built on the principles of transparency and security, it empowers users to buy and sell promotional codes directly, powered by the x402 protocol and AI-driven verification.
Experience the marketplace at: promoxchange.xyz
We leverage Google Gemini Vision AI to automatically extract and verify coupon details from screenshots. This ensures that every listing is accurate, categorized correctly, and validated against the provided terms.
Buying coupons is completely trustless. Transactions are handled via the x402 protocol, allowing for direct USDC payments between buyers and sellers. No middleman, no extra fees—just pure peer-to-peer commerce.
Sign in securely with your wallet using Sign-In with Ethereum (SIWE). We support major wallets including RainbowKit, Porto, and other EVM-compatible providers for a smooth onboarding experience.
Coupons are displayed in a unique, interactive "ticket" format, making it easy to see brand logos, expiry dates, and categories at a glance.
- Framework: Next.js (App Router)
- Payments: x402 Protocol
- Blockchain: Wagmi & Viem
- AI: Google Gemini Pro Vision
- Database: Supabase
- Styling: Tailwind CSS
- Support for multiple stablecoins.
- Enhanced verification mechanisms.
- Mobile-first Progressive Web App (PWA).
© 2026 PromoXchange | Decentralizing the coupon economy.