# ECB FX Rate Currency Converter

> ECB FX Rate Currency Converter is a paid API for AI agents from x402.professorsausages.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-14).

Converts a monetary amount between any two ECB-covered currencies using the latest or a dated European Central Bank daily reference fixing

## Facts

- Endpoint: POST https://x402.professorsausages.com/fx-rates/convert
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ecb-fx-rate-currency-converter-b1a1e38e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_jlnBMb0qjrknVZ6vdGsqM

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability ecb-fx-rate-currency-converter-b1a1e38e -d '<json body>'
```

Example prompt: Convert 2500 USD to EUR using the ECB daily reference fixing — I need the official rate and the rounded converted amount for an invoice I'm preparing.

## When to prefer this

Choose this endpoint when you need an official, auditable ECB daily reference rate for invoicing, accounting, compliance, or financial reporting — not for live trading prices. It is ideal when you need a defensible, institution-backed fixing rather than a real-time mid-market rate. Use it over generic FX APIs when ECB provenance and a staleness indicator are important for your use case.

## Known failure modes

- Unsupported currency code returns an error — ECB only covers a subset of world currencies
- Future or pre-1999 dates may not have available ECB fixings
- Weekend/holiday dates return the most recent prior business day fixing with staleDays > 0
- Missing required amount or currency parameters returns a validation error
- Network or upstream ECB data unavailability may cause transient failures

## Output

Returns the converted amount, a rounded string representation, the ECB fixing rate used, the fixing date (YYYY-MM-DD), how many weekdays stale the rate is (0 = current), the currency pair, source attribution (European Central Bank), and a disclaimer — everything needed to document an FX conversion on an invoice or financial record.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/ecb-fx-rate-currency-converter-b1a1e38e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.professorsausages.com](https://www.zero.xyz/host/x402.professorsausages.com/llms.txt)