# US Treasury Quarterly Exchange Rates

> US Treasury Quarterly Exchange Rates is a paid API for AI agents from proxy.suverse.io, paid per call via x402, $0.004/call, status unknown (last checked 2026-09-16).

Returns official US Treasury quarterly reporting rates of exchange by country, including currency name, exchange rate, and effective date.

## Facts

- Endpoint: POST https://proxy.suverse.io/v1/data/suverse-treasury-exchange-rates
- Price: $0.004/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/us-treasury-quarterly-exchange-rates-bb6bfe50
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_DZ1bRVsW0t-apsjQFSYcm

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-quarterly-exchange-rates-bb6bfe50 -d '<json body>'
```

Example prompt: Look up the official US Treasury quarterly exchange rate for the Euro — I need the government-grade rate and effective date for a compliance report.

## When to prefer this

Choose this endpoint when you need authoritative, government-sanctioned FX rates as published by the US Treasury for compliance, audit, federal grant accounting, or regulatory reporting. Prefer this over market-rate FX APIs (e.g. Open Exchange Rates, Fixer.io) when government-grade or treasury-compliant currency references are required, such as for federal financial statements or cross-border accounting under OMB or GAAP guidelines.

## Known failure modes

- Country or currency not found in Treasury database — returns empty or null result
- Rate not yet published for the current quarter — older effective date returned
- Invalid or malformed POST body — 400 error
- Service unavailable or upstream Treasury data feed down — 500 or timeout
- Payment not fulfilled via x402 protocol — 402 Payment Required

## How this service works

Official US Treasury quarterly reporting rates of exchange by country: currency, exchange rate, effective date. For AI agents doing government grade FX conversion, cross border accounting, and treasury compliant currency reference lookups.

## Output

Returns a structured list of official US Treasury quarterly reporting exchange rates, including country name, currency name, exchange rate (USD-based), and the effective date of the rate — suitable for use in government financial reporting, cross-border accounting, and treasury compliance workflows.

## 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-quarterly-exchange-rates-bb6bfe50/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)