# Getting started x402 V2

Here is a sample code showing how to make a payment:

```java
final String tipUrl = "https://playground.mogami.tech/tip";
OkHttpClient okHttpClient = new OkHttpClient();

try (Response initialResponse = okHttpClient.newCall(new Request.Builder().url(tipUrl).get().build()).execute()) {
    // Extracting the payments requirements from the header
    paymentRequired = X402V2Client.extractPaymentRequired(getHeaders(initialResponse))
                                    .orElseThrow(() -> new IllegalStateException("PaymentRequired should be present"));
} catch (IOException e) {
    System.err.println("IOException during HTTP request to " + tipUrl + ": " + e.getMessage());
    System.exit(-1);
}

// We create a payment with a valid PaymentPayload
PaymentPayload payload = X402V2Client.buildPaymentPayload(
    paymentRequired,
    paymentRequired.accepts().getFirst(),
    Credentials.create(addressPrivateKey)
);

// We call the protected resource with the payment
try (Response paidResponse = okHttpClient.newCall(new Request.Builder().url(tipUrl).get()
                        .headers(Headers.of(X402V2Client.buildPaymentHeaders(payload)))
                        .build()).execute()) {

    final Optional<SettlementResponse> settlementResponse = X402V2Client.extractSettlementResponse(getHeaders(paidResponse));
    if (settlementResponse.isPresent()) {
        System.out.println("Settlement response received: " + settlementResponse.get());
    }

} catch (IOException e) {
    System.err.println("IOException during HTTP request to " + tipUrl + ": " + e.getMessage());
    System.exit(-1);
}
```

To use our Java client SDK in your Maven project, add:

<pre class="language-xml"><code class="lang-xml"><strong>&#x3C;dependency>
</strong>        &#x3C;groupId>tech.mogami.spring&#x3C;/groupId>
        &#x3C;artifactId>mogami-x402-java-client&#x3C;/artifactId>
        &#x3C;version>2.0.1&#x3C;/version>
&#x3C;/dependency>
</code></pre>

or, in your Gradle project, add:

```groovy
dependencies {
    implementation 'tech.mogami.spring:mogami-x402-java-client:2.0.1'
}
```


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