AgentSense — AdSense for the Agent Web

The Problem The internet was built for humans. When a human visits a website, publishers earn through ads or subscriptions. But AI agents are now querying content at massive scale — reading articles, pulling data, consuming APIs — and publishers earn absolutely nothing from this traffic. What AgentSense Does AgentSense is AdSense for the agent web. It gives publishers a monetization layer specifically designed for AI agent traffic, with two models: Option A — Free with Ads: Agent sends a preference header, gets content for free, and a keyword-matched sponsored result is injected into the response. The advertiser pays the publisher directly from their USDC budget via the auction engine. Option B — Pay for Clean Access: Agent pays $0.01 USDC via Circle Nanopayments and x402 protocol on Arc EVM testnet. Publisher receives 70% of the payment. No ads injected. Human visitors always get free access unchanged. How It Works Publishers install a single agentGate() middleware function on their content endpoints. The middleware detects agent requests, issues an HTTP 402 challenge explaining both options, and handles the full payment or ad-injection flow automatically. An auction engine runs keyword matching against active advertiser campaigns in real time. Technology Built on Arc EVM testnet using Circle Developer-Controlled Wallets for agent and publisher wallets, Circle Nanopayments for sub-cent high-frequency transactions, and the x402 protocol for HTTP-native payment negotiation. The platform dashboard tracks both revenue streams — ad-supported queries and paid queries — with real-time on-chain settlement. Why Arc Makes This Possible On Ethereum mainnet, gas fees of $0.50 to $5 per transaction make $0.01 per query economics completely unviable. Arc's sub-cent transaction fees make per-query publisher payments economically sustainable for the first time.