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2026-06-01 23:40:55 +02:00
```java title="Java"
import com.fasterxml.jackson.databind.ObjectMapper;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.util.Map;
public class McpCustomClient {
public static void main(String[] args) throws IOException, InterruptedException {
ProcessBuilder pb = new ProcessBuilder("kreuzberg", "mcp");
Process mcp = pb.start();
ObjectMapper mapper = new ObjectMapper();
try (BufferedWriter stdin = new BufferedWriter(new OutputStreamWriter(mcp.getOutputStream()));
BufferedReader stdout = new BufferedReader(new InputStreamReader(mcp.getInputStream()))) {
Map<String, Object> request = Map.of(
"method", "tools/call",
"params", Map.of(
"name", "extract_file",
"arguments", Map.of("path", "document.pdf", "async", true)
)
);
stdin.write(mapper.writeValueAsString(request));
stdin.newLine();
stdin.flush();
String line = stdout.readLine();
if (line != null) {
System.out.println(line);
}
}
mcp.waitFor();
}
}
```