P402

P402 is an MCP server and payment protocol infrastructure enabling AI agents and services to transact with sub-cent USDC micropayments on the Base L2 blockchain. Through standardized HTTP 402 paywalls and an open SDK, P402 empowers developers and organizations to build or monetize APIs, content, or autonomous agents that can pay for and access digital resources programmatically. Its tools include session key-based frictionless payments, on-chain agent reputation (ERC-8004), developer SDKs, a transaction monitoring dashboard, and policy-driven agent integrations. P402 is ideal for API owners, AI agent builders, and platforms wanting seamless, pay-per-use interoperability, transparent fee collection, and instant micropayment settlement.