Get a Prompt from an MCP Server

See more MCP Client Examples

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.

const std = @import("std");
const chilkat = @import("chilkat");

pub fn main(init: std.process.Init) !void {
    const alloc = init.arena.allocator();

    const mcp = try chilkat.Mcp.init();
    defer mcp.deinit();

    // 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.
    mcp.connect("https://learn.microsoft.com/api/mcp") catch {
        std.debug.print("{s}\n", .{try mcp.getLastErrorText(alloc)});
        return;
    };

    // 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.
    const args = try chilkat.JsonObject.init();
    defer args.deinit();
    args.updateString("topic", "azure-storage") catch {};

    // Call the MCP prompts/get method for the named prompt.  The prompt result is placed in the
    // JsonObject.
    const json = try chilkat.JsonObject.init();
    defer json.deinit();
    mcp.getPrompt("example-prompt", args, json) catch {
        std.debug.print("{s}\n", .{try mcp.getLastErrorText(alloc)});
        return;
    };

    json.setEmitCompact(false);
    std.debug.print("{s}\n", .{try json.emit(alloc)});
    // JSON parsing code for this result can be generated at Chilkat's online tool:
    // https://tools.chilkat.io/jsonParse
}