PHP Requires Chilkat v11.6.0+

Call a Tool on an MCP Server

Demonstrates Mcp.CallTool, which calls the MCP tools/call method for a named tool, passing a JSON arguments object and receiving the tool's result. The example calls the Microsoft Learn microsoft_docs_search tool.

Tip: Code to parse the returned JSON can be generated with Chilkat's online tool at https://tools.chilkat.io/jsonParse.

Background. The members of the arguments object are defined by the tool's input schema, which is reported by ListTools. This example uses the public, no-authentication Microsoft Learn MCP server.

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Chilkat2 PHP

<?php

use Chilkat2\JsonObject;
use Chilkat2\Mcp;

$mcp = new 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.
try {
    $mcp->Connect('https://learn.microsoft.com/api/mcp');

    // Build the tool's input arguments.  The members required depend on the tool's input schema (see
    // ListTools).  Here the Microsoft Learn "microsoft_docs_search" tool takes a search query.
    $args = new JsonObject();
    $args->UpdateString('query', 'How do I create an Azure storage account?');

    // Call the MCP tools/call method for the named tool.  The tool's result is placed in the result
    // JsonObject.
    $result = new JsonObject();
    $mcp->CallTool('microsoft_docs_search', $args, $result);
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

$result->EmitCompact = false;
echo $result->Emit(), "\n";
// JSON parsing code for this result can be generated at Chilkat's online tool:
// https://tools.chilkat.io/jsonParse