ECB Official Currency Converter

x402

ECB Official Currency Converter is a paid API for AI agents from flat-rate-llm.kikoribera03.workers.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's official daily reference rates, optionally for a past date within 90 days.

Price / call$0.005

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StatusUnknown

How this service works

Converts an amount between any two of the ~30 currencies in the European Central Bank's official reference rates, on today's publication or on a past date within the last 90 days. Returns the rate used, its publication date and whether it was crossed through the euro. This is the auditable rate accounting and customs ask for, not a live market quote: it is published once a day and it is reproducible.

Output

Returns a JSON object with the converted amount, the exchange rate used, the ECB publication date, the source and target currency codes, whether the rate was crossed through EUR (viaEur boolean), the requested date, and the data source identifier.

Example use cases

Invoice reconciliation in EUR

“I need to convert 15,000 GBP to EUR using the official ECB rate for yesterday, March 14th — include the rate and whether it went through the euro so I can document it for accounting.”

Customs declaration currency conversion

“What's the ECB official exchange rate from JPY to USD for January 20th? I need the auditable rate for a customs form, not a live market quote.”

Multi-currency expense report

“Convert 3200 CHF to EUR at today's ECB reference rate — I need the exact rate and date published so I can attach it to the expense report.”

Technical details

Endpoint

GEThttps://flat-rate-llm.kikoribera03.workers.dev/v1/fx/convert?utm_source=zero.xyz

When to prefer

Choose this endpoint when you need the official, auditable ECB reference rate — for accounting reconciliation, VAT filings, customs declarations, or any compliance context where reproducibility and official sourcing matter. Prefer this over live market rate APIs when the requirement is an officially published, once-daily rate rather than real-time bid/ask spreads. Ideal for historical lookups within the past 90 days at the same official rate.

Side effects

Unsupported currency code — ECB only covers ~30 currencies, obscure or exotic pairs will fail
Date out of range — dates older than 90 days or in the future are not supported
ECB rate not yet published for today — the daily rate is published at approximately 16:00 CET and may not be available earlier in the day
Invalid ISO 4217 format — malformed currency codes return an error
Same source and target currency may return a trivial rate of 1

Input

Schema · Request body

Field	Type	Description
torequired	string	Target currency, ISO 4217, e.g. EUR.
date	string	Optional publication date, YYYY-MM-DD, within the last 90 days. Defaults to the latest publication.
fromrequired	string	Source currency, ISO 4217, e.g. USD.
amount	number	Amount to convert. Defaults to 1.

Output

Schema · Response

Field	Type	Description
to	string
date	string
from	string
rate	number
amount	number
source	string
viaEur	boolean
converted	number
dateRequested	—

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