Get the Last JSON-RPC Response from an MCP Server

See more MCP Client Examples

Demonstrates Mcp.GetLastJsonData, which returns the complete JSON-RPC response envelope (the jsonrpc, id, and result members) from the most recent request into a JsonObject.

Tip: Code to parse the returned JSON can be generated with Chilkat's online tool at https://tools.chilkat.io/jsonParse.

import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    boolean success = false;

    CkMcp mcp = new CkMcp();

    //  Connect to a public MCP (Model Context Protocol) server over its Streamable HTTP endpoint.  The
    //  Microsoft Learn MCP server is public and requires no authentication.
    success = mcp.Connect("https://learn.microsoft.com/api/mcp");
    if (success == false) {
        System.out.println(mcp.lastErrorText());
        return;
        }

    //  Perform an MCP request.
    CkJsonObject toolsResult = new CkJsonObject();
    success = mcp.ListTools(toolsResult);
    if (success == false) {
        System.out.println(mcp.lastErrorText());
        return;
        }

    //  Get the complete JSON-RPC response envelope (the jsonrpc, id, and result members) from the most
    //  recent request.
    CkJsonObject json = new CkJsonObject();
    mcp.GetLastJsonData(json);

    json.put_EmitCompact(false);
    System.out.println(json.emit());
    //  JSON parsing code for this result can be generated at Chilkat's online tool:
    //  https://tools.chilkat.io/jsonParse
  }
}