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The economic model behind AI agents paying creators in micropayments operates on three core layers: **1. Settlement Infrastructure (Sub-Cent Transactions)** Lepton establishes the value unit: sub-cent moves per article, call, second, and citation. Circle Gateway batches signed EIP-3009 authorizations to clear x402 payments at sub-cent values without per-payment gas costs. Arc provides stablecoin-native settlement with USDC, sub-second finality, and app kits for payment workflows. This eliminates the traditional barrier that micropayments below 1¢ were economically impossible. **2. Agent Spend Control & Transparency** Forum-style mandates bound agent budgets and publish receipts, making spend controls enforceable rather than advisory. Shadow Float gives autonomous agents behavior-backed USDC spending lines on Arc so they can buy x402 services before their own wallet is funded, with debt tracking and blocked-overreach receipts. CitePay's on-chain audit shows DCW wallet balance, transaction count, and USDC paid to creators directly from Arc Testnet RPC—no database, pure chain verification. **3. Citation-as-Payment Mechanism** Each source payment is tiny, automatic, visible to the creator, and tied to the answer that reused the work. CitePay Markets implements this: AI agents pay creators in USDC nanopayments via Circle Gateway x402, with every PAY decision generating an on-chain receipt with SHA-256 evidence hash and content integrity proof. The MCP server integration allows any MCP-compatible AI agent (including Claude) to call cite_query natively, paying creators per citatio