# ECB Foreign Exchange Rates API

> ECB Foreign Exchange Rates API is a paid API for AI agents from api.x-402.online, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-21).

Returns official ECB foreign exchange reference rates for ~30 currencies for today or any historical date since 1999, with optional amount conversion from any base currency

## Facts

- Endpoint: GET https://api.x-402.online/v1/fx/rates?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ecb-foreign-exchange-rates-api-efd96dd5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qFxhxlFwqll8iq9Z3Clik

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 ecb-foreign-exchange-rates-api-efd96dd5
```

Example prompt: What are the official ECB exchange rates for EUR, GBP, and JPY against USD today, and how much would 250 USD convert to in each of those currencies?

## When to prefer this

Choose this endpoint when you need authoritative, official ECB foreign exchange reference rates — especially for compliance, accounting, or financial reporting use cases where the ECB rate is specifically required. It's ideal for historical lookups back to 1999 and supports multi-currency responses in a single call. Prefer this over generic FX APIs when official European Central Bank sourcing matters, or when you need a specific past date's rate.

## Known failure modes

- Invalid currency code returns an error or omits that currency from results
- Dates before 1999 are out of range and will return an error
- Dates in the future return no data or fall back to the latest available rate
- Unsupported base currency may not be directly quoted by ECB
- Missing required query parameters may return a 400 bad request

## How this service works

Official ECB foreign exchange reference rates for about 30 currencies, today or on any past date since 1999, from any base, with amount conversion Official ECB foreign exchange reference rates for about 30 currencies, today or on any past date since 1999, from any base currency, with optional amount conversion. Query: ?base=USD&symbols=EUR,GBP,JPY&date=2024-01-02&amount=250

## Output

Returns a JSON object containing the base currency, the date of the rates, and a map of target currency codes to their exchange rates. If an amount was specified, also includes the converted values in each target currency. Rates are sourced from the European Central Bank's official daily reference rates.

## 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": {}
    }
   },
   "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/ecb-foreign-exchange-rates-api-efd96dd5/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.x-402.online](https://www.zero.xyz/host/api.x-402.online/llms.txt)