> ## Documentation Index
> Fetch the complete documentation index at: https://docs.nexroute.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Quickstart

> Get started with the nexroute API in minutes

This guide will walk you through making your first request to the nexroute API.

## Prerequisites

Before you begin, you need to obtain an API Key.

<Note>
  Please reach out to our team to request an API Key if you haven't received one already.
</Note>

## Make Your First Request

Use the endpoint below to get a swap quote. You'll need to pass your API key in the `X-API-Key` header.

### Get a Quote

This example requests a quote for swapping **WBNB** to **USDT** on BSC.

<CodeGroup>
  ```bash cURL theme={null}
  curl -X POST https://api.nexroute.io/v1/quote \
    -H "Content-Type: application/json" \
    -H "X-API-Key: <YOUR_API_KEY>" \
    -d '{
      "tokenIn": "0xbb4CdB9CBd36B01bD1cBaEBF2De08d9173bc095c",
      "tokenOut": "0x55d398326f99059fF775485246999027B3197955",
      "amountIn": "1000000000000000000"
    }'
  ```

  ```javascript Node.js theme={null}
  const response = await fetch('https://api.nexroute.io/v1/quote', {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
      'X-API-Key': '<YOUR_API_KEY>'
    },
    body: JSON.stringify({
      tokenIn: '0xbb4CdB9CBd36B01bD1cBaEBF2De08d9173bc095c',
      tokenOut: '0x55d398326f99059fF775485246999027B3197955',
      amountIn: '1000000000000000000'
    })
  });

  const data = await response.json();
  console.log(data);
  ```
</CodeGroup>

### Response

The API returns a JSON object containing the `amountOut`, estimated `gas`, `calldata`, and other transaction details.

```json theme={null}
{
  "amountOut": "8643194859422640072",
  "gas": 237995,
  "calldata": "0x8f01f039...",
  "router": "0x365193e7e200CC2Ce82eb67DB0Fed117F8C7c660",
  "spender": "0x365193e7e200CC2Ce82eb67DB0Fed117F8C7c660"
}
```

## Next Steps

Now that you've successfully fetched a quote, check out the [Authentication](/router/authentication) page or explore the full [API Reference](/api-reference/quote/get-swap-quote).