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.

var
success: Boolean;
mcp: HCkMcp;
toolsResult: HCkJsonObject;
json: HCkJsonObject;

begin
success := False;

mcp := CkMcp_Create();

//  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 := CkMcp_Connect(mcp,'https://learn.microsoft.com/api/mcp');
if (success = False) then
  begin
    Memo1.Lines.Add(CkMcp__lastErrorText(mcp));
    Exit;
  end;

//  Perform an MCP request.
toolsResult := CkJsonObject_Create();
success := CkMcp_ListTools(mcp,toolsResult);
if (success = False) then
  begin
    Memo1.Lines.Add(CkMcp__lastErrorText(mcp));
    Exit;
  end;

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

CkJsonObject_putEmitCompact(json,False);
Memo1.Lines.Add(CkJsonObject__emit(json));
//  JSON parsing code for this result can be generated at Chilkat's online tool:
//  https://tools.chilkat.io/jsonParse

CkMcp_Dispose(mcp);
CkJsonObject_Dispose(toolsResult);
CkJsonObject_Dispose(json);