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.

local chilkat = require("chilkat")

local mcp = chilkat.Mcp.new()

-- 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.
local success = mcp:connect("https://learn.microsoft.com/api/mcp")
if not success then
    print(mcp.last_error_text)
    return
end

-- Perform an MCP request.
local toolsResult = chilkat.JsonObject.new()
success = mcp:list_tools(toolsResult)
if not success then
    print(mcp.last_error_text)
    return
end

-- Get the complete JSON-RPC response envelope (the jsonrpc, id, and result members) from the most
-- recent request.
local json = chilkat.JsonObject.new()
mcp:get_last_json_data(json)

json.emit_compact = false
print(json:emit())
-- JSON parsing code for this result can be generated at Chilkat's online tool:
-- https://tools.chilkat.io/jsonParse