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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 2026-09-14).
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
Success—
StatusUnknown
How this service works
60 paid endpoints with no metering, no API key and no account. Each endpoint has one flat price per call, whatever the size of the request: LLM completions with automatic failover across several large models, read-only EVM tooling over Base, Ethereum, Polygon, Arbitrum and Optimism, and pure crypto utilities that touch no network.
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
POSThttps://flat-rate-llm.kikoribera03.workers.dev/v1/fx/convertWhen 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 | — |
Tags
x402
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