Sri Kasibotla@srikasibotla

Validly solves the micropayment problem for API-based validation services. Traditional blockchain payment systems are too expensive for sub-dollar transactions due to gas fees that often exceed the payment amount itself. Our validation API calls range from $0.003 (email verification) to $0.95 (identity check), making standard blockchain payments economically unviable. I built Validly to demonstrate how Circle's payment infrastructure enables an entirely new class of micropayment-powered applications. By combining Circle Developer Controlled Wallets, Circle Gateway x402 nanopayments, and Arc testnet settlement, we created a production-ready platform where every API call is charged in real-time with USDC, settled in under a second, and fully auditable on-chain.

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!