# US Treasury Official FX Rates

> US Treasury Official FX Rates is a paid API for AI agents from clonecho.builda.company, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-13).

Returns official U.S. government quarterly foreign exchange rates for federal reporting, optionally filtered by country/currency zone.

## Facts

- Endpoint: POST https://clonecho.builda.company/x402/treasury-fx
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/us-treasury-official-fx-rates-fcf08561
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_xhsKbJAkk_x9ffhWR-FI8

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 us-treasury-official-fx-rates-fcf08561 -d '<json body>'
```

Example prompt: Can you pull the official US Treasury quarterly FX rate for the Euro Zone? I need it for federal reporting purposes.

## When to prefer this

Use this endpoint when you need authoritative, official U.S. government foreign exchange rates for federal financial reporting, compliance, or auditing purposes — not market rates or real-time trading rates. Prefer this over commercial FX APIs when official government-sourced quarterly rates are specifically required.

## Known failure modes

- Invalid or unrecognized country name returns an error or empty result
- No data available for requested quarter returns empty or null response
- Network timeout or service unavailability returns a 5xx error
- Malformed query parameter may return a 400 bad request

## How this service works

ECONOMICS: official U.S. government quarterly FX rates for federal reporting (?country=Euro Zone; omit for latest quarter, all currencies). Returns JSON.

## Output

JSON object containing official U.S. Treasury quarterly foreign exchange rates, including currency codes, country names, and USD conversion rates. If a country parameter is supplied (e.g. 'Euro Zone'), returns rates for that specific currency; omitting the parameter returns the latest quarter's rates for all currencies.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/us-treasury-official-fx-rates-fcf08561/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)