# US Treasury Fiscal Data – Rates of Exchange

> US Treasury Fiscal Data – Rates of Exchange is a paid API for AI agents from proxy.suverse.io, paid per call via x402, $0.065/call, status unknown (last checked 2026-09-14).

Returns the official US Treasury Reporting Rates of Exchange used by federal agencies to convert foreign currency balances to USD, sorted newest first, by country and currency.

## Facts

- Endpoint: POST https://proxy.suverse.io/v1/data/suverse-fiscal-treasury-rates-of-exchange
- Price: $0.065/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/us-treasury-fiscal-data-rates-of-exchange-8142024f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_4XBKJ7AfDsGbZiQMZ4-or

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-fiscal-data-rates-of-exchange-8142024f -d '<json body>'
```

Example prompt: What is the current official US Treasury reporting exchange rate for the euro, as used by federal agencies to convert foreign currency to USD?

## When to prefer this

Choose this endpoint when you need the official US government exchange rates for federal accounting and reporting purposes rather than live market rates. It is authoritative for compliance, grant reporting, government contracting, and any scenario where the regulatory requirement is specifically the US Treasury Fiscal Data rate, not a commercial FX rate.

## Known failure modes

- Empty result set if queried country or currency is not in Treasury data
- Stale data if Treasury FiscalData source has not been updated recently
- Upstream source unavailability causing a degraded or failed response
- Malformed POST body returning a 400-level error
- Payment failure via x402 protocol preventing request execution

## How this service works

The official US Treasury Reporting Rates of Exchange used by federal agencies to convert foreign currency balances to USD, by country and currency. Source: US Treasury FiscalData. Sorted newest first; trim page size as needed.

## Output

Returns a list of official US Treasury exchange rate records sorted newest first, each including country name, currency name, exchange rate (units per USD or USD per unit), and the effective date of the rate. The data reflects rates used by US federal agencies for official foreign currency reporting and accounting.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "properties": {}
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST",
      "PUT",
      "PATCH"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/us-treasury-fiscal-data-rates-of-exchange-8142024f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from proxy.suverse.io](https://www.zero.xyz/host/proxy.suverse.io/llms.txt)