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: Integer;
mcp: TChilkatMcp;
toolsResult: TChilkatJsonObject;
json: TChilkatJsonObject;

begin
success := 0;

mcp := TChilkatMcp.Create(Self);

//  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 = 0) then
  begin
    Memo1.Lines.Add(mcp.LastErrorText);
    Exit;
  end;

//  Perform an MCP request.
toolsResult := TChilkatJsonObject.Create(Self);
success := mcp.ListTools(toolsResult.ControlInterface);
if (success = 0) then
  begin
    Memo1.Lines.Add(mcp.LastErrorText);
    Exit;
  end;

//  Get the complete JSON-RPC response envelope (the jsonrpc, id, and result members) from the most
//  recent request.
json := TChilkatJsonObject.Create(Self);
mcp.GetLastJsonData(json.ControlInterface);

json.EmitCompact := 0;
Memo1.Lines.Add(json.Emit());
//  JSON parsing code for this result can be generated at Chilkat's online tool:
//  https://tools.chilkat.io/jsonParse