Arun Nadarasa@socialprescribing

CliniPay Arc is a Clinical Arc–style HealthTech demonstration that wires common NHS interoperability patterns to Arc Testnet USDC using HTTP 402 / x402 nanopayments. It reframes how clinical data APIs are commercialised: today, vendors like EMIS and TPP charge flat annual partner-programme fees plus per-integration licensing, and EPR platforms (Epic at Lewisham & Greenwich £52M, Somerset & Dorset £222M) bury interop inside ten-year contracts. Agents, however, call APIs per-millisecond. CliniPay Arc shows a per-call settlement lane built for that traffic. The project showcases four primary surfaces: a local SNOMED CT RF2 browser (SQLite-backed search and concept detail, with optional paid LLM-assisted concept summary); NHSBSA dm+d intelligence (free wardle-compatible search plus paid lookup and prescribing summary); an NHS UK "open data" lane that grounds paid retrieval and synthesis in curated CSV datasets; and Confidential Data Rails (CDR) vault workflows with policy framing and file-handling patterns suitable for a demo. A shared shell provides wallet connectivity, facilitator selection (Circle Gateway vs Thirdweb EIP-3009), and transparent balance UX. An optional on-chain runner supports hackathon-style evidence gathering, separate from the clinical demos. Stack: React 19 + TypeScript + Vite client, Express server, OpenAPI discovery, local data-prep scripts. All clinical content is synthetic or reference-only — this is an engineering and payments interoperability prototype for judges and builders, not a clinical system

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!