VB.NET Requires Chilkat v11.6.0+

Get the Last JSON-RPC Response from an MCP Server

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.

Background. This exposes the full protocol-level response for inspection or debugging after any MCP request.

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VB.NET

Dim success As Boolean = False

Dim mcp As New 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 = False) Then
    Debug.WriteLine(mcp.LastErrorText)
    Exit Sub
End If


'  Perform an MCP request.
Dim toolsResult As New Chilkat.JsonObject
success = mcp.ListTools(toolsResult)
If (success = False) Then
    Debug.WriteLine(mcp.LastErrorText)
    Exit Sub
End If


'  Get the complete JSON-RPC response envelope (the jsonrpc, id, and result members) from the most
'  recent request.
Dim json As New Chilkat.JsonObject
mcp.GetLastJsonData(json)

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