Get a Prompt from an MCP Server

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Demonstrates Mcp.GetPrompt, which calls the MCP prompts/get method for a named prompt, passing a JSON arguments object and receiving the prompt result.

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

-- Build the prompt's arguments (pass an empty object for a prompt that takes no arguments).  The
-- prompt name and its arguments come from the "prompts" array returned by ListPrompts.
local args = chilkat.JsonObject.new()
args:update_string("topic", "azure-storage")

-- Call the MCP prompts/get method for the named prompt.  The prompt result is placed in the
-- JsonObject.
local json = chilkat.JsonObject.new()
success = mcp:get_prompt("example-prompt", args, json)
if not success then
    print(mcp.last_error_text)
    return
end

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