NanoPay Arc- AI Nanopayment API on Arc

ArcPay is a per-API monetization engine built on Arc blockchain using Circle USDC and Nanopayments. Every API request costs $0.001 USDC — paid onchain, verified before response, settled in under a second. The system works as follows: a client pays $0.001 USDC to our NanoPayment smart contract on Arc, includes the transaction hash in their API request header, our server verifies the payment onchain, and only then does the Gemini 2.0 Flash AI agent process and return a response. We demonstrated 55+ onchain transactions during our demo, each at $0.001 USDC per call, proving the economic viability of this model. This would be completely impossible on Ethereum where gas fees of $2+ per transaction would make $0.001 pricing economically unviable. On Arc, transaction costs are a fraction of a cent, enabling 98%+ margins on sub-cent pricing. The project targets two tracks: Per-API Monetization Engine and Agent-to-Agent Payment Loop. The Gemini AI agent autonomously processes paid requests, representing a real machine-to-machine commerce flow where intelligence is monetized per query. Technologies used: Arc (settlement), USDC (payment token), Circle Nanopayments, Gemini 2.0 Flash (AI agent), Solidity + Foundry (smart contract), Node.js + Express (API server). Contract deployed at: 0xAfDfc3341fdBec40843eD99633A6cA1B32B0298d on Arc Testnet.