Java SDK

Coming Soon

The official Java SDK is under development. Use HttpClient (Java 11+) for direct integration.

Direct integration with HttpClient

import java.net.URI;
import java.net.http.*;

HttpClient client = HttpClient.newHttpClient();

// Step 1: Get access token
HttpRequest authRequest = HttpRequest.newBuilder()
  .uri(URI.create("https://api.api4business.com/oauth/v1/token"))
  .header("Content-Type", "application/x-www-form-urlencoded")
  .POST(HttpRequest.BodyPublishers.ofString(
    "grant_type=client_credentials&client_id=YOUR_CLIENT_ID&client_secret=YOUR_CLIENT_SECRET"))
  .build();
HttpResponse<String> authResponse = client.send(authRequest, HttpResponse.BodyHandlers.ofString());
// Parse access_token from authResponse.body()

// Step 2: Call any endpoint
HttpRequest request = HttpRequest.newBuilder()
  .uri(URI.create("https://api.api4business.com/vas-api/pan-validation-v1"))
  .header("Authorization", "Bearer YOUR_ACCESS_TOKEN")
  .header("Content-Type", "application/json")
  .POST(HttpRequest.BodyPublishers.ofString("{\"pan\": \"ABCDE1234F\"}"))
  .build();
HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
System.out.println(response.body());