NeuroPay — Pay-Per-Inference AI on Arc

NeuroPay is a live, deployed Pay-Per-Inference AI API competing in the Usage-Based Compute Billing track. It is hosted at https://neuropay-arc.onrender.com and powered end-to-end by Circle's infrastructure on Arc. THE PROBLEM: AI inference requires fair usage-based pricing — but traditional blockchain gas fees destroy the economics. Ethereum gas costs $2.50 per transaction, which is 1,667 times more than a $0.0015 inference charge. Even Polygon at $0.05 gas is 33 times the payment value. Sub-cent AI billing is economically impossible on traditional chains. THE SOLUTION: Circle Nanopayments on Arc eliminates gas overhead entirely. NeuroPay charges exactly $0.001 per 100 tokens in USDC, settled on Arc in under one second with zero gas cost — giving providers 100% margin retention. WHAT WE BUILT: - Real AI inference using Groq's Llama 3.1 model — actual tokens counted, actual billing - Circle Nanopayments integration for gas-free USDC settlement on Arc - Agent-to-agent payment simulation showing autonomous AI economics - Live transaction feed with Arc tx hashes verifiable on the block explorer - Cumulative analytics dashboard tracking USDC volume vs traditional gas costs - Full REST API with /infer, /deposit, /stats, /margin-analysis endpoints - Professional web dashboard showing real-time billing metrics KEY PROOF POINTS: - 55+ on-chain transactions demonstrated at sub-cent pricing - $0.00 gas cost across all transactions via Nanopayments - Traditional gas equivalent saved: $5.50+ across the demo - Margin multiplier: 66x more efficient than Polygon, 1,667x vs Ethereum NeuroPay proves that usage-based AI billing at machine scale is only viable on Arc with Circle Nanopayments — and shows exactly what the agentic economy infrastructure layer looks like.