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

# Configure Horizon Endpoints with Stellar Libraries

> Set up and configure Stellar Horizon API endpoints for different networks in React Native

export const Card = ({imgUrl, title, description, href, horizontal = false, newTab = false}) => {
  const [isHovered, setIsHovered] = useState(false);
  const handleClick = e => {
    e.preventDefault();
    if (newTab) {
      window.open(href, '_blank', 'noopener,noreferrer');
    } else {
      window.location.href = href;
    }
  };
  return <div className={`not-prose relative my-2 p-[1px] rounded-xl transition-all duration-300 ${isHovered ? 'bg-gradient-to-r from-[#FF4E00] to-[#874AE3]' : 'bg-gray-200'}`} onMouseEnter={() => setIsHovered(true)} onMouseLeave={() => setIsHovered(false)}>
      <a href={href} onClick={handleClick} className={`not-prose flex ${horizontal ? 'flex-row' : 'flex-col'} font-normal h-full bg-white overflow-hidden w-full cursor-pointer rounded-[11px] no-underline`}>
        {imgUrl && <div className={`relative overflow-hidden flex-shrink-0 ${horizontal ? 'w-[30%] rounded-l-[11px]' : 'w-full'}`} onClick={e => e.stopPropagation()}>
            <img src={imgUrl} alt={title} className="w-full h-full object-cover pointer-events-none select-none" draggable="false" />
            <div className="absolute inset-0 pointer-events-none" />
          </div>}
        <div className={`flex-grow px-6 py-5 ${horizontal ? 'w-[70%]' : 'w-full'} flex flex-col ${horizontal && imgUrl ? 'justify-center' : 'justify-start'}`}>
          {title && <h2 className="font-semibold text-base text-gray-800 m-0">{title}</h2>}
          {description && <div className={`font-normal text-gray-500 re leading-6 ${horizontal || !imgUrl ? 'mt-0' : 'mt-1'}`}>
              <p className="m-0 text-xs">{description}</p>
            </div>}
        </div>
      </a>
    </div>;
};

Configure Horizon API endpoints for Stellar to connect to different networks, use custom nodes, or optimize performance. Stellar uses [Horizon](https://developers.stellar.org/docs/data/horizon) as its HTTP API layer instead of traditional RPC endpoints.

<Card title="Setup Stellar Libraries First" description="You must complete the Stellar library setup before configuring Horizon endpoints" href="/v2/react-native/guides/web3-operations/stellar/setup-libraries" horizontal />

## Configure Horizon Server

```typescript theme={null}
import { Horizon, Networks } from "@stellar/stellar-sdk";

// Public Horizon endpoints
const mainnetServer = new Horizon.Server("https://horizon.stellar.org");
const testnetServer = new Horizon.Server("https://horizon-testnet.stellar.org");

// Custom Horizon endpoint (e.g., self-hosted or third-party provider)
const customServer = new Horizon.Server("https://your-custom-horizon.example.com", {
  allowHttp: false, // set to true only for local development
});
```

## Switch Networks

When switching between mainnet and testnet, update both the Horizon URL and the network passphrase used for signing:

```typescript theme={null}
import { useParaStellarSigner } from "@getpara/react-native-wallet/stellar";
import { Horizon, Networks } from "@stellar/stellar-sdk";

type StellarNetwork = "mainnet" | "testnet";

const NETWORK_CONFIG = {
  mainnet: {
    horizonUrl: "https://horizon.stellar.org",
    networkPassphrase: Networks.PUBLIC,
  },
  testnet: {
    horizonUrl: "https://horizon-testnet.stellar.org",
    networkPassphrase: Networks.TESTNET,
  },
} as const;

function useStellarNetwork(network: StellarNetwork) {
  const config = NETWORK_CONFIG[network];

  const { stellarSigner, isLoading } = useParaStellarSigner({
    networkPassphrase: config.networkPassphrase,
  });

  const server = new Horizon.Server(config.horizonUrl);

  return { server, stellarSigner, isLoading, networkPassphrase: config.networkPassphrase };
}
```

## Check Server Health

```typescript theme={null}
import { Horizon } from "@stellar/stellar-sdk";

async function checkHorizonHealth() {
  const server = new Horizon.Server("https://horizon.stellar.org");

  // Get ledger info
  const ledger = await server.ledgers().order("desc").limit(1).call();
  const latestLedger = ledger.records[0];
  console.log("Latest ledger:", latestLedger.sequence);
  console.log("Closed at:", latestLedger.closed_at);

  // Get fee stats
  const feeStats = await server.feeStats();
  console.log("Base fee:", feeStats.last_ledger_base_fee);
  console.log("Fee charged (p50):", feeStats.fee_charged.p50);
}
```

## Next Steps

<CardGroup cols={3}>
  <Card title="Query Balances" description="Check XLM and token balances" href="/v2/react-native/guides/web3-operations/stellar/query-balances" icon="wallet" />

  <Card title="Send Tokens" description="Transfer XLM between accounts" href="/v2/react-native/guides/web3-operations/stellar/send-tokens" icon="paper-plane" />

  <Card title="Execute Transactions" description="Build complex Stellar transactions" href="/v2/react-native/guides/web3-operations/stellar/execute-transactions" icon="bolt" />
</CardGroup>