We headed to Cannes for ETHGlobal Pragma and the ETHGlobal Cannes Hackathon with 15,000 USDC in prizes for teams with the best builds on Arc. Across four tracks, 68 teams shipped apps and primitives exploring advanced stablecoin logic, chain-abstracted USDC flows, nanopayments, prediction markets, and the agentic economy. We were blown away by the creativity, ambition, and quality of the builds submitted. The Arc team spent the week supporting founders and developers building toward real economic activity onchain. Here’s what the winning teams built: 🏆 Best Smart Contracts on Arc with Advanced Stablecoin Logic Onda: A Chrome extension that detects what music you're listening to, looks up the artist, and automatically sends them $0.01 USDC micropayments on Arc. Submission Showcase: https://t.co/KxFAIM0o38 PayMate: A programmable credit pool where payment providers instantly borrow USDC while investors earn returns, with four AI agents paying each other for services using Circle Nanopayments. Submission Showcase: https://t.co/KPeaivggse 🏆 Best Chain-Abstracted USDC Apps Using Arc as a Liquidity Hub NanoCrawl: Solves web monetization for the AI era by giving agents wallets to pay publishers per page with sub-cent USDC on Arc, using disposable wallets for privacy and multi-chain withdrawals. Submission Showcase: https://t.co/RDSXlJzSEB ETHastic: A resilient mesh payment system where transactions move device-to-device over long-range radio and settle on-chain once connectivity is reached, enabling commerce even off-grid. Submission Showcase: https://t.co/y0f6Rx5LFv 🏆 Best Agentic Economy with Nanopayments VEIL VPN: A pay-as-you-go VPN using secure hardware to cryptographically prove no logging, with agents paying per use via Circle Nanopayments on Arc. Submission Showcase: https://t.co/RlIoi3tfbi C.E.S.T.A Agent: A voice-first AI where friends pool USDC on Arc and Claude manages road trips through voice,bridging on-chain USDC to virtual credit cards for traditional merchants. Submission Showcase: https://t.co/LD9vQIPe3X 🏆 Best Prediction Markets Built on Arc with Real-World Signal Predict It!: A prediction market where users stake USDC on pre-recorded penalty kicks before watching the video, with smart contracts on Arc settling payouts—anchoring markets to real sports footage instead of news speculation. Submission Showcase: https://t.co/rH2jZ3f2eL PolyPOP: A social-native prediction market where users post predictions on X, tag PolyPOP, and the protocol creates instant markets Submission Showcase: https://t.co/Z6U8kg7B5p Thanks to all the teams that took part and congratulations to the winners! The Arc builder ecosystem keeps growing.