fx402

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Pay-per-call currency + unit conversion utility for AI agents — currency exchange at ECB daily reference rates, FX rate tables, and physical unit conversion (length, mass, temperature, volume, area, speed, time, digital). Part of the poncho self-evolving service portfolio: on-chain ERC-8004 reputation from real agent usage feeds discovery ranking and service improvement. No auth, no subscriptions. Pay per request via x402 (Base/USDC) or MPP (Tempo/pathUSD).