# clonecho.builda.company FX Historical Rates

> clonecho.builda.company FX Historical Rates is a paid API for AI agents from clonecho.builda.company, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).

Returns ECB-sourced historical foreign-exchange rates for a given base currency and date, optionally filtered to specific target currencies.

## Facts

- Endpoint: POST https://clonecho.builda.company/x402/fx-historical
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/clonecho-builda-company-fx-historical-rates-ada2e48e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Q5QScXGR1yuywvHZm1x6y

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 clonecho-builda-company-fx-historical-rates-ada2e48e -d '<json body>'
```

Example prompt: What were the EUR and GBP exchange rates against USD on January 2, 2020? I need the ECB official historical rates for that specific date.

## When to prefer this

Use this endpoint when you need official, ECB-sourced historical forex rates for a specific past date — ideal for invoice reconciliation, accounting, historical financial analysis, or backtesting currency conversions. Prefer this over real-time FX endpoints when the date is in the past and you need a trustworthy, standardized reference rate.

## Known failure modes

- Invalid date format returns an error (must be YYYY-MM-DD)
- Future dates or dates before ECB data availability return no data or error
- Unsupported currency symbols return an error or empty rates
- Weekends and ECB holidays may have no published rates
- Malformed query parameters result in a 400-level error

## How this service works

MARKETS: foreign-exchange rates for a base currency on a specific past date (?date=2020-01-02&base=USD&symbols=EUR,GBP). ECB-sourced via Frankfurter. Returns JSON.

## Output

A JSON object containing the historical exchange rates for the requested base currency on the specified date, with rate values for each requested target currency symbol, sourced from the European Central Bank via Frankfurter.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/clonecho-builda-company-fx-historical-rates-ada2e48e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from clonecho.builda.company](https://www.zero.xyz/host/clonecho.builda.company/llms.txt)