# Auor.io (Oreo) - Historical Exchange Rates

> Auor.io (Oreo) - Historical Exchange Rates is a paid API for AI agents from api.auor.io, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-13).

Retrieves historical foreign exchange rate information for a given date or period

## Facts

- Endpoint: GET https://api.auor.io/all-rates-today/v1/historical
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/auor-io-oreo-historical-exchange-rates-22b74d49
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_k3BQqOtsp-4_I-iUAI6AP

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 auor-io-oreo-historical-exchange-rates-22b74d49
```

Example prompt: What was the exchange rate from USD to EUR on March 15, 2024?

## When to prefer this

Use this endpoint when you need historical (past) exchange rate data rather than current rates. Prefer this over the sibling current-rates endpoint when doing financial reconciliation, backtesting, historical reporting, or auditing transactions that occurred on a specific past date.

## Known failure modes

- Invalid or unsupported currency code returns an error or empty result
- Date out of supported historical range returns an error
- Missing required query parameters returns a validation error
- Rate limiting or payment failure via x402 protocol blocks the request

## How this service works

Historical exchange rate information

## Output

Returns historical exchange rate data for the requested currency pair and date, including the rate value and relevant date metadata.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "$ref": "https://api.auor.io/schemas/all-rates-today/v1/historical/input.json",
     "type": "object",
     "$schema": "https://json-schema.org/draft/2020-12/schema"
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/auor-io-oreo-historical-exchange-rates-22b74d49/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.auor.io](https://www.zero.xyz/host/api.auor.io/llms.txt)