# SiteCheck FX Exchange Rates

> SiteCheck FX Exchange Rates is a paid API for AI agents from api.sitecheck-api.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-12).

Returns current or historical foreign exchange rates and currency conversions using European Central Bank reference data

## Facts

- Endpoint: GET https://api.sitecheck-api.workers.dev/api/fx?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sitecheck-fx-exchange-rates-21a363cd
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_EMfWeKjwDDOvDtUCYjwON

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 sitecheck-fx-exchange-rates-21a363cd
```

Example prompt: What's today's exchange rate from USD to EUR, GBP, and JPY, and how much would 250 dollars be in each of those currencies?

## When to prefer this

Choose this endpoint when you need lightweight, pay-per-call currency conversion or FX rate lookup without requiring a subscription or API key. It is ideal for agents that occasionally need exchange rates without committing to a dedicated FX API. It uses ECB reference rates which are authoritative for EUR-based conversions. Prefer alternatives if you need real-time intraday tick data, crypto-to-fiat rates, or rates from a non-ECB source.

## Known failure modes

- Unsupported currency code returns an error or missing rate
- Future dates return an error (only historical and current dates supported)
- Weekend/holiday dates may return the most recent prior business day's rates
- Very old historical dates outside ECB coverage window may fail
- Network timeout from the upstream Frankfurter/ECB data source

## How this service works

Pay-per-call tools for AI agents: image generation, speech-to-text, text-to-speech, embeddings, LLM chat, website audits and contact enrichment, web page to Markdown reader, PDF to text, sitemap URLs, tech stack detection, translation, exchange rates, e-mail pre-check, domain RDAP/DNS lookup, Solana token checks, trending tokens and wallet holdings, plus business and compliance data (EU VAT/VIES, IBAN, LEI/GLEIF, US recalls, OSHA/EPA violations, UK insolvency notices). Plus prediction-market search, briefs, quotes and unsigned buy transactions, powered by Panta. Payment: x402, USDC on Base, Solana or Arc. No signup, no API key.

## Output

A JSON object containing the base currency, date, a map of target currency codes to exchange rates, the requested amount, the data source (European Central Bank via Frankfurter), and a converted amounts map showing the base amount expressed in each target currency.

## 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"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "to": {
       "type": "string",
       "description": "Target currencies, comma-separated (default: all)"
      },
      "end": {
       "type": "string",
       "description": "YYYY-MM-DD: time series end (default today)"
      },
      "date": {
       "type": "string",
       "description": "YYYY-MM-DD for a past day"
      },
      "from": {
       "type": "string",
       "description": "Base currency, default USD"
      },
      "start": {
       "type": "string",
       "description": "YYYY-MM-DD: time series start"
      },
      "amount": {
       "type": "string",
       "description": "Amount to convert, default 1"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "base": "USD",
  "date": "2026-10-08",
  "rates": {
   "EUR": 0.89397,
   "GBP": 0.7612,
   "TRY": 49.215
  },
  "amount": 250,
  "source": "European Central Bank reference rates via Frankfurter (https://frankfurter.dev)",
  "converted": {
   "EUR": 223.4925,
   "GBP": 190.3,
   "TRY": 12303.75
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/sitecheck-fx-exchange-rates-21a363cd/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.sitecheck-api.workers.dev](https://www.zero.xyz/host/api.sitecheck-api.workers.dev/llms.txt)