verified owner API x402 solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdpeip155:8453eip155:137eip155:42161

Get daily reference exchange rates per one unit of a base currency, with observation date

Get daily reference exchange rates per one unit of a base currency, with observation date and currency codes. Not executable trading quotes. ECB source data is also available free from ecb.europa.eu.

3000 (raw units)

price

—

calls / 30d

—

unique payers

2026-09-19

updated

Provider

Saylor Innovations Knowledge Base · verified

For agents

Capabilities: Get daily reference exchange rates per one unit of a base currency, with observation date and currency codes. Not executable trading quotes. ECB source data is also available free from ecb.europa.eu.
License: Commercial — pay-per-request via x402
Repository: https://github.com/SaylorInnovations/solana-x402

Payment (x402 accepts[])

[
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "3000",
    "maxTimeoutSeconds": 120
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
    "asset": "Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB",
    "amount": "3000",
    "maxTimeoutSeconds": 120
  },
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0xf8A376eBF123D7252cd7b66bcD77A727a4def22f",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "3000",
    "maxTimeoutSeconds": 120
  },
  {
    "scheme": "exact",
    "network": "eip155:137",
    "payTo": "0xf8A376eBF123D7252cd7b66bcD77A727a4def22f",
    "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
    "amount": "3000",
    "maxTimeoutSeconds": 120
  },
  {
    "scheme": "exact",
    "network": "eip155:42161",
    "payTo": "0xf8A376eBF123D7252cd7b66bcD77A727a4def22f",
    "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
    "amount": "3000",
    "maxTimeoutSeconds": 120
  }
]

Output schema

{
  "type": "object",
  "required": [
    "service",
    "subject",
    "retrievedAt",
    "source",
    "report"
  ],
  "properties": {
    "service": {
      "type": "string"
    },
    "subject": {
      "type": "string"
    },
    "retrievedAt": {
      "type": "string",
      "format": "date-time"
    },
    "source": {
      "type": "object",
      "required": [
        "name",
        "url"
      ],
      "properties": {
        "name": {
          "type": "string"
        },
        "url": {
          "type": "string",
          "format": "uri"
        }
      }
    },
    "report": {
      "type": "object",
      "properties": {
        "base": {
          "type": "string"
        },
        "date": {
          "type": "string"
        },
        "amount": {
          "type": "number"
        },
        "rates": {
          "type": "object",
          "additionalProperties": {
            "type": "number"
          }
        },
        "notice": {
          "type": "string"
        }
      },
      "required": [
        "base",
        "date",
        "amount",
        "rates",
        "notice"
      ]
    }
  }
}

Use it

curl

curl "https://saylorinnovations.com/api/data/exchange-rates?base={base}"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

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

Python

import httpx
res = httpx.get("https://saylorinnovations.com/api/data/exchange-rates?base={base}")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Machine-readable

Everything on this page is also available as clean JSON at /resources/reference-exchange-rates.json, and this resource appears in /discovery/resources and /discovery/search.