Laurie Sartain@laurie99

Americans spend $560B per year on gasoline. SF drivers leave $200–$400 annually on the table by not routing to the cheapest nearby station. The dominant data source — GasBuddy — relies on self-reported submissions with no economic incentive for accuracy. Most prices are stale or wrong. Gyasss is a transaction-verified gas price oracle that fixes this with two parallel economic loops, both running on Circle Nanopayments and Arc: INBOUND: Users submit price reports and earn USDC cashback by data freshness — $0.005 for redundant data up to $0.50 for breaking a 24-hour stale-station bounty. A consensus-weighted oracle combines the last 30 reports per station with time-decay weighting, so no single user can move the price. High-value bounty reports require a $0.10 USDC stake; outliers get slashed. OUTBOUND: Two oracle endpoints — cheapest-gas and cheapest-parking — serve real-time queries to AI agents via x402. Each query costs $0.001 USDC, settled in batches via Circle Gateway. Any developer worldwide can query our oracle now using AIsa's open-source x402 client. The bidirectional architecture is the key insight: same Nanopayments primitive, opposite roles. We are simultaneously an x402 seller AND a USDC sender. To our knowledge, no other entry uses Nanopayments in both directions. Parking is a live second vertical proving the platform thesis. Roadmap: any commodity with dynamic pricing where transaction-verified data beats self-reporting. The recommendation engine is route-aware via Mapbox Directions, computing real driving detour distance and time, then netting against value-of-time and detour gas cost. WHY THIS FAILS WITH TRADITIONAL GAS: We pay users $0.005–$0.50 per data point and charge agents $0.001 per query. On Ethereum ($2–$5/tx), both sides are 1000x underwater. On L2s ($0.01–$0.05), the agent market doesn't exist and cashback margin is negative. Only Arc's batched settlement makes both loops positive-margin.

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!