SignalPay
SignalPay is a forkable marketplace where agents pay per API call in USDC over x402, exposing a drop-in x402 FastAPI middleware for HTTP 402 gating on any endpoint, an ERC-8004 reputation integration for on-chain agent identity, and an eight-node LangGraph buyer-agent template handling discovery, payment signing, and signal consumption. A Foundry SignalRegistry is deployed on Arc 5042002 at 0xEB917D183dDB7FdC1883da14dC64b8d20a77e55d, with a real x402 flow (402, EIP-3009 sign, retry) using local EIP-712 signature recovery, a Circle facilitator settle that never fabricates receipts, four server-side spend-governance gates, on-chain ERC-8004 ReputationRegistry writes, live data from Pyth, DefiLlama, and Arc RPC, and per-user HMAC-derived wallets.
2 — -Laolex, Phoenix.
AI agents buy and sell crypto alpha signals via nanopayments on Arc. Sub-cent payments, zero gas, real-time settlement.