# exchange-rates.hergertsynthora.com FX Rate Lookup

> exchange-rates.hergertsynthora.com FX Rate Lookup is a paid API for AI agents from exchange-rates.hergertsynthora.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).

Returns real-time foreign exchange rates for 170+ currencies given a base currency code

## Facts

- Endpoint: POST https://exchange-rates.hergertsynthora.com/service
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/exchange-rates-hergertsynthora-com-fx-rate-lookup-6f909456
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Y2gmwfkSR5jRdE1YoNABL

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 exchange-rates-hergertsynthora-com-fx-rate-lookup-6f909456 -d '<json body>'
```

Example prompt: What are the current exchange rates for all currencies relative to USD right now?

## When to prefer this

Use this endpoint when an AI agent needs real-time FX rates before executing a cross-border transaction or performing currency conversion calculations, especially in x402 payment-enabled workflows. Suited for financial agents that need live rate data for 170+ currencies with per-call micropayment pricing.

## Known failure modes

- Invalid or unsupported base currency code returns an error response
- Upstream FX data provider failure — no charge incurred per stated policy
- Missing X-WALLET header may result in authentication or billing failure
- Exceeded free-call quota without valid wallet address

## How this service works

Real-time foreign exchange rates for 170+ currencies. Financial agents need FX before cross-border transactions.

## Output

A set of real-time exchange rates for 170+ currencies expressed relative to the specified base currency, suitable for use in cross-border payment calculations or financial conversions.

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "niche": "exchange-rates",
  "result": {}
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/exchange-rates-hergertsynthora-com-fx-rate-lookup-6f909456/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from exchange-rates.hergertsynthora.com](https://www.zero.xyz/host/exchange-rates.hergertsynthora.com/llms.txt)