Get the Last JSON-RPC Response from an MCP Server

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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.

Dim fso, outFile
Set fso = CreateObject("Scripting.FileSystemObject")
'Create a Unicode (utf-16) output text file.
Set outFile = fso.CreateTextFile("output.txt", True, True)

success = 0

set mcp = CreateObject("Chilkat.Mcp")

'  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
    outFile.WriteLine(mcp.LastErrorText)
    WScript.Quit
End If

'  Perform an MCP request.
set toolsResult = CreateObject("Chilkat.JsonObject")
success = mcp.ListTools(toolsResult)
If (success = 0) Then
    outFile.WriteLine(mcp.LastErrorText)
    WScript.Quit
End If

'  Get the complete JSON-RPC response envelope (the jsonrpc, id, and result members) from the most
'  recent request.
set json = CreateObject("Chilkat.JsonObject")
mcp.GetLastJsonData json

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

outFile.Close