Gate402: Pay-per-call agent APIs for on-chain data, DEX pricing, and news sentiment, settled in USDC over HTTP 402

Gate402 is a pay-per-call API service for trading agents, using HTTP 402 (Payment Required) to settle machine-to-machine payments in USDC. It offers on-chain data endpoints (wallet/contract intel, DEX prices/liquidity, news sentiment) across Base, Polygon, Arbitrum, and Solana. T