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VeriPay is an agent-to-agent payment protocol that enables AI systems to charge and pay per action using USDC on Arc. In traditional systems, charging per API call or per AI action is impractical due to high transaction costs and latency. VeriPay solves this by metering actions offchain and compressing them into a single onchain settlement. In our demo, a customer agent executes 100 actions against a provider agent, each priced at 0.001 USDC. Instead of sending 100 separate transactions, VeriPay aggregates all actions into a cryptographic action root and settles them in one transaction on Arc. The provider receives a real USDC payment, and the entire batch is verifiable through the action root and transaction data. This design enables a new economic model for AI: real-time, per-action payments between autonomous agents. APIs, compute services, and AI tools can monetize usage precisely without relying on subscriptions or centralized billing systems. VeriPay demonstrates that sub-cent agent payments are only viable on Arc due to its stablecoin-native design and low, predictable transaction costs.

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!