metasync / wp-mcp-server / mcp-stdio-bridge.php

mcp-stdio-bridge.php in Search Atlas SEO – OTTO AI SEO Automation for WordPress 2.7.0, at wp-mcp-server/mcp-stdio-bridge.php

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1	#!/usr/bin/env php
2	<?php
3	/**
4	* MCP stdio Bridge for WordPress (PHP Implementation)
5	*
6	* This bridge allows MCP clients (Claude Desktop, Claude Code) to communicate
7	* with WordPress MCP tools via stdio (standard input/output).
8	*
9	* Usage:
10	* php mcp-stdio-bridge.php
11	*
12	* Configuration (Claude Desktop):
13	* {
14	* "mcpServers": {
15	* "wordpress-metasync": {
16	* "command": "php",
17	* "args": ["/path/to/mcp-stdio-bridge.php"]
18	* }
19	* }
20	* }
21	*
22	* @package Metasync
23	* @subpackage Metasync/wp-mcp-server
24	* @since 2.0.0
25	*/
26
27	// Ensure we're running in CLI mode
28	if (php_sapi_name() !== 'cli') {
29	fwrite(STDERR, "Error: This script must be run from the command line\n");
30	exit(1);
31	}
32
33	// Suppress unnecessary WordPress output
34	// NOTE: Don't define WP_CLI constant - it causes Elementor to crash expecting WP_CLI class
35	define('DOING_AJAX', true);
36	define('WP_USE_THEMES', false);
37	define('DISABLE_WP_CRON', true);
38	define('METASYNC_MCP_BRIDGE', true); // Custom flag for our bridge
39
40	// Determine WordPress root path
41	// Try multiple possible locations for WordPress installation
42
43	$possible_paths = [
44	// Docker container path
45	'/var/www/html/wp-load.php',
46	// Standard installation (5 levels up from script)
47	dirname(dirname(dirname(dirname(dirname(__FILE__))))) . '/wp-load.php',
48	// Alternative: 4 levels up
49	dirname(dirname(dirname(dirname(__FILE__)))) . '/wp-load.php',
50	// Bedrock/custom structure
51	dirname(dirname(dirname(dirname(dirname(dirname(__FILE__)))))) . '/wp-load.php',
52	];
53
54	$wp_load_path = null;
55	foreach ($possible_paths as $path) {
56	if (file_exists($path)) {
57	$wp_load_path = $path;
58	break;
59	}
60	}
61
62	if (!$wp_load_path) {
63	fwrite(STDERR, "Error: Cannot find WordPress wp-load.php\n");
64	fwrite(STDERR, "Tried the following paths:\n");
65	foreach ($possible_paths as $path) {
66	fwrite(STDERR, " - $path\n");
67	}
68	fwrite(STDERR, "\nIf using Docker, run via mcp-stdio-bridge-docker.sh wrapper\n");
69	exit(1);
70	}
71
72	// Bootstrap WordPress
73	require_once $wp_load_path;
74
75	// Verify MCP server is available
76	global $metasync_mcp_server;
77	if (!isset($metasync_mcp_server) \|\| !$metasync_mcp_server) {
78	fwrite(STDERR, "Error: Metasync MCP server not initialized\n");
79	exit(1);
80	}
81
82	$auth_result = $metasync_mcp_server->authenticate_bridge_request(getenv('WP_MCP_API_KEY'));
83	if (is_wp_error($auth_result)) {
84	fwrite(STDERR, 'Error: ' . $auth_result->get_error_message() . "\n");
85	exit(1);
86	}
87
88	// Disable output buffering for real-time communication
89	ob_implicit_flush(true);
90	while (ob_get_level()) {
91	ob_end_clean();
92	}
93
94	// Log startup to stderr (for debugging)
95	fwrite(STDERR, "MCP stdio bridge started (PHP)\n");
96	fwrite(STDERR, "WordPress version: " . get_bloginfo('version') . "\n");
97	fwrite(STDERR, "Metasync version: " . (defined('METASYNC_VERSION') ? METASYNC_VERSION : 'unknown') . "\n");
98	fwrite(STDERR, "Listening on stdin...\n");
99
100	// Main event loop - read from stdin, process, write to stdout
101	while (!feof(STDIN)) {
102	$line = fgets(STDIN);
103
104	// Skip empty lines
105	if ($line === false \|\| trim($line) === '') {
106	continue;
107	}
108
109	$result = $metasync_mcp_server->process_json_rpc_request($line);
110	if ($result['body'] !== null) {
111	fwrite(STDOUT, json_encode($result['body']) . "\n");
112	fflush(STDOUT);
113	}
114	}
115
116	fwrite(STDERR, "MCP stdio bridge terminated\n");
117