# Signal Nodus FX Rate

> Signal Nodus FX Rate is a paid API for AI agents from api.signalnodus.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-12).

Returns current foreign exchange rates for multiple currencies relative to a base currency (e.g. USD)

## Facts

- Endpoint: GET https://api.signalnodus.ai/v1/fx/rate?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/signal-nodus-fx-rate-9aed511a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_zCOc_UYvkdNO0pI6egNPy

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 signal-nodus-fx-rate-9aed511a
```

Example prompt: What are today's exchange rates for EUR, GBP, and JPY against USD?

## When to prefer this

Choose this endpoint when you need a fast, low-cost ($0.01 USDC) lookup of current FX rates for major currency pairs against a USD base, especially in an x402-compatible payment workflow. It is suitable for lightweight enrichment or monitoring tasks rather than high-frequency trading infrastructure.

## Known failure modes

- Invalid or unsupported base currency returns an error
- Network timeout or upstream rate feed unavailable returns a 5xx error
- Rate limit exceeded returns a 429 response
- Payment failure (x402) results in no data returned

## How this service works

Signal Nodus: year-over-year diffs of SEC filing sections, pinned to accession numbers. The diff is the product; raw data is the on-ramp.

## Output

A JSON object containing the base currency (e.g. 'USD'), the date of the rates, and a map of currency codes to their exchange rates (e.g. EUR: 0.86386, GBP: 0.73933, JPY: 159.7).

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "base": "USD",
  "date": "2026-08-18",
  "rates": {
   "EUR": 0.86386,
   "GBP": 0.73933,
   "JPY": 159.7
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/signal-nodus-fx-rate-9aed511a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.signalnodus.ai](https://www.zero.xyz/host/api.signalnodus.ai/llms.txt)