Dmitriy Bondarenko@oxeacc

Arc ESP32 NanoRelay is a working machine-to-machine commerce demo where a physical ESP32 relay is controlled by programmable USDC payments on Arc Testnet. Each action costs 0.001 USDC, well below the $0.01 requirement, and is processed through Circle Nanopayments. When a valid payment is received, the backend verifies it, queues the relay action, and toggles relay 1 on the ESP32 board. A second payment toggles it off. The project demonstrates how Arc and Circle Nanopayments make tiny per-action payments economically practical for real physical devices. Instead of subscriptions or manual control panels, machines can expose individual actions as paid endpoints. This model can support IoT access, robotics, vending, pay-per-use hardware, smart infrastructure, and autonomous agents that purchase physical-world actions in real time.

In this hybrid hackathon powered by Arc and Circle, developers will build the next generation of Agentic economic applications using Circle’s Nanopayments infrastructure with settlement on Arc in USDC. For the first time, high-frequency, usage-based transactions between users, APIs, and AI agents can operate without gas overhead eroding margin. Arc provides stablecoin-native settlement with predictable, dollar-denominated USDC fees and deterministic, sub-second finality — enabling real-time coordination and economically viable per-action pricing at scale. 📅 April 20 – 26, 2026 • Apr 20 – 25 (Online): Submit projects by Apr 25. • Apr 25 (On-site Build – SF, CA): Teams refine projects. • Apr 26 (On-site Demos & Awards – SF, CA): Live pitches & winners announced. Get guidance from Arc and Circle experts through on-site support. 📍 On-site Venue (April 25-26): MindsDB SF AI Collective 3154 17th St, San Francisco, California, USA 🤝 Go solo or team up, it's your flow. 🏆 Compete for a $15,000+ Prize Pool. 📍 Please note: If approved for the on-site experience, you’ll also have the opportunity to showcase your project live. Travel and accommodation will not be covered. 🧑🏻‍💻 Secure your spot now – sign up before the Kick-Off Stream!