fast-api
by Pi-Squared-Inc
Universal payment SDK for AI agents. Send tokens, check balances, create payment links, swap tokens, bridge cross-chain, look up prices, sign messages, list providers, and register custom EVM chains across 13 chains (Fast, Base, Ethereum, Arbitrum, Polygon, Optimism, BSC, Avalanche, Fantom, zkSync, Linea, Scroll, Solana) or any EVM chain. Use when asked to pay, transfer, request payment, create payment link, swap, bridge, check price, sign a message, fund a wallet, check a balance, or list available providers. Do NOT use for yield farming, lending, staking, or SDK-only incoming payment detection from arbitrary external senders.