ECB Currency Rates Converter

x402

ECB Currency Rates Converter is a paid API for AI agents from onchaincheck.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-29).

Converts an amount between two currencies using the European Central Bank daily reference rate, returning the rate, converted amount, and rate date.

Price / call$0.005

Seller volume →—

Success—

StatusUnknown

How this service works

Convert an amount between two currencies at the European Central Bank daily reference rate, latest or for a past date, returning the rate used, the result, and the rate date.

Output

A JSON object containing: the source currency (from), target currency (to), the original amount, the ECB reference rate used, the converted result, the date of the rate used, and a source attribution string crediting the European Central Bank via frankfurter.dev.

Example use cases

Invoice reconciliation in foreign currency

“I need to convert 8500 euros to US dollars using the ECB official rate from 2024-03-15 — what's the result and what rate was used?”

Real-time expense reporting tool

“My employee submitted an expense of 320 GBP — how much is that in EUR at today's ECB reference rate?”

Historical FX rate lookup for accounting

“What was the ECB rate for USD to JPY on 2023-11-01, and how much would 10000 USD have been worth in yen that day?”

Technical details

Endpoint

GEThttps://onchaincheck.dev/fx/convert?utm_source=zero.xyz

When to prefer

Choose this endpoint when you need an authoritative, neutral official exchange rate from the European Central Bank rather than a commercial bank or broker rate. Ideal for compliance, accounting, invoicing, or regulatory contexts where the ECB daily reference rate is specifically required. Supports historical rate lookups by date, making it suitable for auditing past transactions.

Side effects

Invalid ISO 4217 currency code returns an error (e.g. unsupported or misspelled currency)
Date falls on a weekend or ECB holiday when no rate was published — may return nearest available date or an error
Amount is not a valid positive number — schema validation failure
Requested date is in the future — no ECB rate available
ECB data source (frankfurter.dev) is temporarily unavailable — upstream dependency failure

Input

Schema · Request body

Field	Type	Description
inputrequired	object
output	object

Output

Schema · Response

{
  "type": "json",
  "example": {
    "to": "CAD",
    "date": "2026-10-22",
    "from": "USD",
    "rate": 1.4034,
    "amount": 250,
    "result": 350.85,
    "source": "European Central Bank reference rates via frankfurter.dev"
  }
}

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