Fiat FX conversion API

Convert between fiat currencies at the current exchange rate. Answers queries like 'USD to EUR rate', 'convert dollars to yen', 'what is the GBP/USD exchange rate today'.

Price$0.01per request

MethodGET

Route/v1/finance/fx

StatusLive

MIME typeapplication/json

Rate limit60/minute

Cache300s public

financefxcurrencyexchange-rateforexconversionmoney

API URLhttps://x402.hexl.dev/v1/finance/fx

Integration docs

Example request

{
  "base": "USD",
  "quote": "EUR"
}

Example response

{
  "base": "USD",
  "quote": "EUR",
  "rate": 0.92,
  "date": "2026-05-31"
}

Input schema

{
  "type": "object",
  "required": [
    "base",
    "quote"
  ],
  "properties": {
    "base": {
      "type": "string",
      "minLength": 3,
      "maxLength": 3,
      "examples": [
        "USD"
      ]
    },
    "quote": {
      "type": "string",
      "minLength": 3,
      "maxLength": 3,
      "examples": [
        "EUR"
      ]
    }
  }
}

Output schema

{
  "type": "object",
  "required": [
    "base",
    "quote",
    "rate",
    "date"
  ],
  "properties": {
    "base": {
      "type": "string"
    },
    "quote": {
      "type": "string"
    },
    "rate": {
      "type": "number"
    },
    "date": {
      "type": "string"
    }
  }
}