# CIEL M2M API – FX Historical Exchange Rates

> CIEL M2M API – FX Historical Exchange Rates is a paid API for AI agents from 169.58.38.67.sslip.io, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-18).

Retrieves historical foreign exchange rate data for a given currency pair and date range

## Facts

- Endpoint: GET https://169.58.38.67.sslip.io/api/fx-historical
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-18
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ciel-m2m-api-fx-historical-exchange-rates-080ceac5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_zNtTbYRkzRbDd0d-_J1w8

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 ciel-m2m-api-fx-historical-exchange-rates-080ceac5
```

Example prompt: Can you pull the historical exchange rates for USD to EUR from January 1 to March 31, 2024? I need to see how the rate moved over that quarter.

## When to prefer this

Choose this endpoint when you need historical (past) FX rate data for a specific currency pair, particularly in a pay-per-call context without a subscription commitment. Well-suited for agents performing financial reconciliation, backtesting, or one-off date lookups where a full forex data subscription would be overkill.

## Known failure modes

- Invalid or unsupported currency pair returns an error or empty result
- Date range out of bounds or future dates may return no data
- Malformed query parameters result in a 400-level error
- Payment failure via x402/USDC results in 402 Payment Required before data is returned
- Rate limiting or quota exhaustion may return a 429 error

## How this service works

50+ micro-services for AI agents: data parsing, crypto analytics, security scanning, code tools, and more. Pay per call via x402 (USDC on Base) or RapidAPI subscription.

## Output

Returns a JSON object containing historical FX rate data, typically including date-indexed exchange rate values for the requested currency pair over the specified time period.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "result": "data"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/ciel-m2m-api-fx-historical-exchange-rates-080ceac5/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from 169.58.38.67.sslip.io](https://www.zero.xyz/host/169.58.38.67.sslip.io/llms.txt)