Foreign exchange (Forex) rate database sourced from the European Central Bank (ECB)

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x38C063312719220c676E988f0DEE14B4ec0e44C8",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "2000",
    "maxTimeoutSeconds": 300
  }
]

{
  "bazaar": {
    "category": "data-provider",
    "info": {
      "input": {
        "method": "GET",
        "queryParams": {
          "base": "USD",
          "date": "latest",
          "to": "EUR,GBP,JPY"
        },
        "type": "http"
      },
      "output": {
        "example": {
          "base": "USD",
          "date": "2025-01-01",
          "rates": {
            "EUR": 0.92,
            "GBP": 0.78,
            "JPY": 145.2
          },
          "source": "European Central Bank"
        },
        "type": "json"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "additionalProperties": false,
          "properties": {
            "method": {
              "enum": [
                "GET"
              ],
              "type": "string"
            },
            "queryParams": {
              "properties": {
                "base": {
                  "description": "Base currency ISO code (e.g. USD, EUR, GBP)",
                  "type": "string"
                },
                "date": {
                  "description": "Historical date in YYYY-MM-DD format, or 'latest' for real-time rates",
                  "type": "string"
                },
                "to": {
                  "description": "Comma-separated target currency ISO codes (e.g. 'GBP,JPY,EUR'). Omit to retrieve all available fiat rates.",
                  "type": "string"
                }
              },
              "required": [],
              "type": "object"
            },
            "type": {
              "const": "http",
              "type": "string"
            }
          },
          "required": [
            "type",
            "method"
          ],
          "type": "object"
        },
        "output": {
          "properties": {
            "example": {
              "type": "object"
            },
            "type": {
              "type": "string"
            }
          },
          "required": [
            "type"
          ],
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    },
    "tags": [
      "currency",
      "forex",
      "exchange-rates",
      "finance",
      "banking",
      "international-payments"
    ]
  }
}

curl "https://vibesprings.net/api/exchange"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

const res = await fetch("https://vibesprings.net/api/exchange");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

import httpx
res = httpx.get("https://vibesprings.net/api/exchange")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header