> For the complete documentation index, see [llms.txt](https://docs.expand.network/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.expand.network/getting-started.md).

# Getting Started

### Follow these steps to get started today :

#### Step 1: 🔑 Create an API key (For further details, [<mark style="color:blue;">Click here</mark>](/how-do-i-get-my-api-key.md))

#### Step 2:  Make Your First Request

#### Performing READ operations

To perform **read** queries, directly target our domain **`https://api.expand.network/`** to hit our API environmen&#x74;**.** Following are the examples to make read queries:

{% hint style="info" %}
📑 Replace **"`YOUR_API_KEY"`** with your **API Key,** which was received by completing Step 1.
{% endhint %}

#### Example 1: via Postman

<figure><img src="/files/Un7UxZIZiyNuOagOx1zw" alt=""><figcaption><p>API KEY - AUTHORIZATION</p></figcaption></figure>

<figure><img src="/files/pn5xUoAXEYQ8Mqyi9qb1" alt=""><figcaption><p>Sample request via Postman</p></figcaption></figure>

#### Example 2: via cURL from a command line

```
curl -H "x-api-key: YOUR_API_KEY" https://api.expand.network/chain/getbalance?address=0xe688b84b23f322a994A53dbF8E15FA82CDB71127
```

#### Performing WRITE operations

To perform a **write** transaction, you would require the followings:-

1. expand.network SDK which can be cloned from [GitHub](https://github.com/expand-network/sdk-nodejs.git).
2. API key&#x20;

* *Example code*: Send one Wei from an address ending in `2c7` to address ending in `86F`. You need to use your private key to sign the transaction. The return value is the transaction hash (`res`).&#x20;

```javascript
const rawTransaction = await signTransaction({
    from: '0x1BdC0A29f667E2cc74e55531431986838023E2c7',
    to: '0x94a5E554DC172A472421291Ae6e6c0e3C150286F',
    value: '1',
    gas: 50000,
},{
    privateKey: YOUR_PRIVATE_KEY',
    xApiKey : 'YOUR_API_KEY'
}).then(rawTransaction => sendTransaction({
    rawTransaction: rawTransaction.rawTransaction,
    xApiKey : 'YOUR_API_KEY'
})).then(res => console.log(res));
```

{% hint style="info" %}
**Good to know:** All transactions are securely signed on your end, so your **private key remains with you**. Expand.network does not hold your crypto or have access to your private key at any point.
{% endhint %}