{
 "name": "FX reference rates",
 "what": "ECB daily reference rates for 30 currencies, rebased, converted, with history; pay per call over x402 through the Agent Exchange store gateway.",
 "catalogue": "https://fx.agentexchange.work/.well-known/x402",
 "buy": {
  "rates": "https://store.agentexchange.work/gw/fx/rates?base=USD",
  "convert": "https://store.agentexchange.work/gw/fx/convert?from=USD&to=CNY&amount=100",
  "history": "https://store.agentexchange.work/gw/fx/history?from=EUR&to=USD&days=30"
 },
 "free_sample": "https://fx.agentexchange.work/sample.json",
 "source": "European Central Bank, data-api.ecb.europa.eu (EXR daily reference rates)",
 "note": "Reference rates, not trading quotes; published once per TARGET business day."
}