# Get Effective Price (Preview Market Order)

## Get Effective Price (Preview Market Order)

<mark style="color:blue;">`GET`</mark> `https://api.swivel.exchange/v2/fillpreview?underlying=u&maturity=m&volume=v&vault=w&exit=e`

This endpoint allows you to request a limit order payload that matches a given market order.\
\
Returns the effective price as well as orders for consumption.

#### Query Parameters

| Name                                         | Type    | Description                                                                     |
| -------------------------------------------- | ------- | ------------------------------------------------------------------------------- |
| underlying<mark style="color:red;">\*</mark> | string  | The underlying token being transacted. E.g. USDC, DAI, etc.,                    |
| maturity<mark style="color:red;">\*</mark>   | string  | The maturity of market in unix seconds.                                         |
| volume<mark style="color:red;">\*</mark>     | string  | The amount of currency to use.                                                  |
| vault<mark style="color:red;">\*</mark>      | boolean | Indicates if an order is in relation to a initiating/exiting a vault or zcToken |
| exit<mark style="color:red;">\*</mark>       | boolean | Indicated if an order is an exit or an initiate                                 |

{% tabs %}
{% tab title="200 " %}

```
{
    "orders": [
        {
            "order": {
                "key": "0xa8181ff6e0bfa16130944d5add7220eed46f44796de7d4216728dde40376ac5e",
                "maker": "0x096Da21Ac79ae1EDbC69A07CE5c705E6c77Fec90",
                "underlying": "0x5592EC0cfb4dbc12D3aB100b257153436a1f0FEa",
                "vault": true,
                "exit": false,
                "principal": "107758620689655172413793",
                "premium": "10000000000000000000000",
                "maturity": "1669957199",
                "expiry": "1641371984"
            },
            "meta": {
                "price": "0.0928",
                "signature": "0xa4e8958193cf2cb9c70e4c4a7df9c3c7b68f89fd2f250d80e6bc9dbd9cba8c54415fb2f4d8da33c1d81d5a028233255b52adbf36bee3a2a929fb3ea3e735ff7a1c",
                "premiumAvailable": "10000000000000000000000",
                "principalAvailable": "107758620689655172413793",
                "previewFill": "1000",
                "sequence": 63593
            }
        }
    ],
    "effectivePrice": "0.092799999999999997156",
    "timestamp": 1640178873
}
```

{% endtab %}

{% tab title="400 Passed volume exceeds available" %}

```
{
     "message": "passed volume exceeds available" 
}
```

{% endtab %}

{% tab title="400: Bad Request Passed volume exceeds the maximum number of orders allowed" %}

```javascript
{
    "message": "passed volume exceeds the maximum number of orders allowed"
}
```

{% endtab %}
{% endtabs %}


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.swivel.finance/swivel-v2.0.0/developers/exchange/get/get-effective-price-preview-market-order.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.