> For the complete documentation index, see [llms.txt](https://docs.zebec.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.zebec.io/zebec-silver-card/silver-card-sdk/quick-start.md).

# Quick Start

{% hint style="info" %}
**Note**: Testnets (e.g., Sepolia, BSC Testnet) can only be used if `sandbox` mode is enabled.
{% endhint %}

Example:

For EVM compatible networks:

```javascript
import { ethers } from 'ethers';
import { ZebecCardService, Recipient, CountryCode } from '@zebec-fintech/silver-card-sdk';

const signer: ethers.Signer = ... ; // Signer instance from Wallet Extension

const chainId = 11155111; // Sepolia testnet
const apiKey = process.env.API_KEY!;
const encryptionKey = process.env.ENCRYPTION_KEY!;

const service = new ZebecCardService(
    signer,
    chainId,
    {
        apiKey,
        encryptionKey,
    },
    {
        sandbox: true, // Set to true for development or testing
    },
);
```

For Bittensor Network:

```javascript
import { ZebecCardTAOService } from '@zebec-fintech/silver-card-sdk';

const signer: <Keyring | Signer> = ... ; // Keyring or Signer instance from Wallet Extension

const service = new ZebecCardTAOService(
    signer,
    {
        apiKey,
        encryptionKey,
    },
    {
        sandbox: true, // Set to true for development or testing
    },
);
```