# FX Currency Converter (ECB Rates, Any Base)

> FX Currency Converter (ECB Rates, Any Base) is a paid API for AI agents from pay.brianbooms.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-10).

Converts a monetary amount between any two currencies using ECB reference rates, with no base-currency restriction and honest as_of timestamps.

## Facts

- Endpoint: GET https://pay.brianbooms.com/api/v1/data/fx-convert?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-10
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/fx-currency-converter-ecb-rates-any-base-31e83be1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_F__0-_cu8mv4ya3ycv_IY

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 fx-currency-converter-ecb-rates-any-base-31e83be1
```

Example prompt: Convert 250 EUR to JPY using ECB reference rates — I need the converted amount and the timestamp of the rate used.

## When to prefer this

Choose this endpoint when you need to convert between any pair of currencies without being locked to a single base currency (a restriction imposed by Fixer and Open Exchange Rates on free tiers). It is ideal for agents that need flexible, any-base FX conversion backed by ECB reference rates at a low per-call cost with no subscription required.

## Known failure modes

- Invalid or unsupported 3-letter currency code returns an error
- ECB reference rates are updated once daily so intraday precision is limited
- Non-numeric amount string may cause a parsing error
- Rate unavailable for exotic currency pairs not covered by ECB

## How this service works

Use when an agent needs a fiat conversion with any base currency — Fixer and OXR lock the base on free tiers; this one doesn't. ECB reference rates, honest as_of timestamps, no subscription. Pass from/to codes and amount. Use permitted: build it into your products and services, paid or free. Raw redistribution of the feed itself is prohibited.

## Output

Returns the converted monetary amount, the exchange rate applied, and an as_of timestamp indicating when the ECB reference rate was last updated. The data is resaleable by the caller.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "properties": {
  "to": {
   "type": "string",
   "description": "3-letter code. Example: JPY"
  },
  "from": {
   "type": "string",
   "description": "3-letter code, any base. Example: EUR"
  },
  "amount": {
   "type": "string",
   "description": "Amount to convert. Example: 100"
  }
 },
 "additionalProperties": true
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/fx-currency-converter-ecb-rates-any-base-31e83be1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from pay.brianbooms.com](https://www.zero.xyz/host/pay.brianbooms.com/llms.txt)