# X-Rates Monthly Average API

> Retrieves monthly average exchange rates for a specific currency pair for a given year. Returns up to 12 monthly data points with the average rate and number of days in each month. Defaults to the current year if year is not specified.

Source: https://www.sandbase.ai/apis/x-rates/monthly-average
API reference: https://www.sandbase.ai/apis/x-rates/monthly-average#api

## Facts

- Provider: X-Rates
- Type: Data API
- Endpoint: `POST https://api.sandbase.ai/v1/api/x-rates/monthly-average`
- Price: $0.03 per call
- Capabilities: api, x rates, finance, forex
- Billing: pay per use from one SandBase balance; no provider account or subscription needed

## Call it

`POST https://api.sandbase.ai/v1/api/x-rates/monthly-average` with `Authorization: Bearer $SANDBASE_API_KEY` and the parameters as a JSON body.

| Parameter | Type | Required | Allowed values |
| --- | --- | --- | --- |
| `to` | string | yes |  |
| `from` | string | yes | USD, EUR, GBP, JPY, CHF, CAD, AUD |
| `year` | string | no |  |
| `amount` | number | no |  |

## FAQ

### How do I use the X-Rates Monthly Average API?

Send a POST request to https://api.sandbase.ai/v1/api/x-rates/monthly-average with your SandBase API key in the Authorization header (Bearer) and the parameters as a JSON body. You can also try it in the Playground on this page without writing code.

### How much does the X-Rates Monthly Average API cost?

$0.03 per call, billed from your SandBase balance. You are only charged for calls you make; there is no subscription.

### What parameters does the X-Rates Monthly Average API accept?

Required: to (string) and from (one of USD, EUR, GBP, JPY, CHF, CAD, AUD). Optional: year (string) and amount (number). The Parameters table and the Playground on this page list every field.

### What does the X-Rates Monthly Average API return?

A JSON response returned in the same HTTP request (synchronous).

### Do I need a X-Rates developer account or API key?

No. X-Rates Monthly Average runs through SandBase, so one SandBase API key covers this endpoint and every other API and model in the catalog. You do not need to apply for X-Rates API access separately.

## README

### X-Rates Monthly Average API

Retrieves monthly average exchange rates for a specific currency pair for a given year. Returns up to 12 monthly data points with the average rate and number of days in each month. Defaults to the current year if year is not specified.

#### Request

```bash
curl -X POST "https://api.sandbase.ai/v1/run" \
  -H "Authorization: Bearer $SANDBASE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "x-rates/monthly-average", "to": "JPY", "from": "USD", "year": "2024", "amount": 1.0}'
```

The result is returned in `outputs[0].data`.

#### Parameters

| Name | Type | Required | Description |
|---|---|---|---|
| `from` | string | Yes | Source currency code (e.g. USD). One of: `USD`, `EUR`, `GBP`, `JPY`, `CHF`, `CAD`, `AUD`. |
| `to` | string | Yes | Target currency code (e.g. EUR). |
| `amount` | number | No | Amount to calculate rates for. |
| `year` | string | No | Year in YYYY format. Defaults to the current year. |

#### Pricing

Flat $0.03 per call. Failed calls are not charged.