| 1 |
#!/usr/bin/env php |
| 2 |
<?php |
| 3 |
/** |
| 4 |
* MCP HTTP Bridge for WordPress (PHP Implementation) |
| 5 |
* |
| 6 |
* This bridge allows MCP clients to communicate with WordPress MCP tools |
| 7 |
* via HTTP using JSON-RPC protocol. |
| 8 |
* |
| 9 |
* Usage: |
| 10 |
* # Run standalone HTTP server |
| 11 |
* php mcp-http-bridge.php --port=3000 --host=localhost |
| 12 |
* |
| 13 |
* # Or use PHP built-in server |
| 14 |
* php -S localhost:3000 mcp-http-bridge.php |
| 15 |
* |
| 16 |
* Configuration (Claude Desktop/Code): |
| 17 |
* { |
| 18 |
* "mcpServers": { |
| 19 |
* "wordpress-metasync": { |
| 20 |
* "url": "http://localhost:3000", |
| 21 |
* "transport": "http" |
| 22 |
* } |
| 23 |
* } |
| 24 |
* } |
| 25 |
* |
| 26 |
* Environment Variables: |
| 27 |
* WP_MCP_PORT=3000 - HTTP server port |
| 28 |
* WP_MCP_HOST=localhost - HTTP server host |
| 29 |
* WP_MCP_API_KEY=secret - Optional API key for authentication |
| 30 |
* |
| 31 |
* @package Metasync |
| 32 |
* @subpackage Metasync/wp-mcp-server |
| 33 |
* @since 2.0.0 |
| 34 |
*/ |
| 35 |
|
| 36 |
// Check if running as standalone server or via PHP built-in server |
| 37 |
$is_builtin_server = php_sapi_name() === 'cli-server'; |
| 38 |
$is_cli = php_sapi_name() === 'cli'; |
| 39 |
|
| 40 |
if (!$is_builtin_server && !$is_cli) { |
| 41 |
http_response_code(500); |
| 42 |
die("Error: This script must be run from the command line or via PHP built-in server\n"); |
| 43 |
} |
| 44 |
|
| 45 |
// Suppress unnecessary WordPress output |
| 46 |
define('WP_CLI', true); |
| 47 |
define('DOING_AJAX', true); |
| 48 |
define('WP_USE_THEMES', false); |
| 49 |
define('DISABLE_WP_CRON', true); |
| 50 |
|
| 51 |
// Determine WordPress root path |
| 52 |
// Try multiple possible locations for WordPress installation |
| 53 |
|
| 54 |
$possible_paths = [ |
| 55 |
// Docker container path |
| 56 |
'/var/www/html/wp-load.php', |
| 57 |
// Standard installation (5 levels up from script) |
| 58 |
dirname(dirname(dirname(dirname(dirname(__FILE__))))) . '/wp-load.php', |
| 59 |
// Alternative: 4 levels up |
| 60 |
dirname(dirname(dirname(dirname(__FILE__)))) . '/wp-load.php', |
| 61 |
// Bedrock/custom structure |
| 62 |
dirname(dirname(dirname(dirname(dirname(dirname(__FILE__)))))) . '/wp-load.php', |
| 63 |
]; |
| 64 |
|
| 65 |
$wp_load_path = null; |
| 66 |
foreach ($possible_paths as $path) { |
| 67 |
if (file_exists($path)) { |
| 68 |
$wp_load_path = $path; |
| 69 |
break; |
| 70 |
} |
| 71 |
} |
| 72 |
|
| 73 |
if (!$wp_load_path) { |
| 74 |
$error_msg = "Error: Cannot find WordPress wp-load.php\nTried: " . implode(', ', $possible_paths); |
| 75 |
if ($is_builtin_server) { |
| 76 |
http_response_code(500); |
| 77 |
die($error_msg); |
| 78 |
} else { |
| 79 |
fwrite(STDERR, $error_msg . "\n"); |
| 80 |
exit(1); |
| 81 |
} |
| 82 |
} |
| 83 |
|
| 84 |
// Bootstrap WordPress |
| 85 |
require_once $wp_load_path; |
| 86 |
|
| 87 |
// Verify MCP server is available |
| 88 |
global $metasync_mcp_server; |
| 89 |
if (!isset($metasync_mcp_server) || !$metasync_mcp_server) { |
| 90 |
if ($is_builtin_server) { |
| 91 |
http_response_code(500); |
| 92 |
die("Error: Metasync MCP server not initialized"); |
| 93 |
} else { |
| 94 |
fwrite(STDERR, "Error: Metasync MCP server not initialized\n"); |
| 95 |
exit(1); |
| 96 |
} |
| 97 |
} |
| 98 |
|
| 99 |
// Disable output buffering |
| 100 |
ob_implicit_flush(true); |
| 101 |
while (ob_get_level()) { |
| 102 |
ob_end_clean(); |
| 103 |
} |
| 104 |
|
| 105 |
// If running via PHP built-in server, handle the request immediately |
| 106 |
if ($is_builtin_server) { |
| 107 |
handle_http_request(); |
| 108 |
exit(0); |
| 109 |
} |
| 110 |
|
| 111 |
// Otherwise, start standalone HTTP server |
| 112 |
start_standalone_server(); |
| 113 |
|
| 114 |
/** |
| 115 |
* Start standalone HTTP server (socket-based) |
| 116 |
*/ |
| 117 |
function start_standalone_server() { |
| 118 |
// Parse command line arguments |
| 119 |
$options = getopt('', ['port:', 'host:']); |
| 120 |
$port = $options['port'] ?? getenv('WP_MCP_PORT') ?: 3000; |
| 121 |
$host = $options['host'] ?? getenv('WP_MCP_HOST') ?: 'localhost'; |
| 122 |
|
| 123 |
echo "Starting MCP HTTP Bridge (PHP)...\n"; |
| 124 |
echo "WordPress version: " . get_bloginfo('version') . "\n"; |
| 125 |
echo "Metasync version: " . (defined('METASYNC_VERSION') ? METASYNC_VERSION : 'unknown') . "\n"; |
| 126 |
echo "Listening on http://{$host}:{$port}\n"; |
| 127 |
echo "Press Ctrl+C to stop\n\n"; |
| 128 |
|
| 129 |
// Create socket |
| 130 |
$socket = @stream_socket_server("tcp://{$host}:{$port}", $errno, $errstr); |
| 131 |
|
| 132 |
if (!$socket) { |
| 133 |
fwrite(STDERR, "Error: Could not create socket: $errstr ($errno)\n"); |
| 134 |
exit(1); |
| 135 |
} |
| 136 |
|
| 137 |
// Accept connections in loop |
| 138 |
while (true) { |
| 139 |
$client = @stream_socket_accept($socket, -1); |
| 140 |
if (!$client) { |
| 141 |
continue; |
| 142 |
} |
| 143 |
|
| 144 |
// Read HTTP request |
| 145 |
$request = ''; |
| 146 |
while (!feof($client)) { |
| 147 |
$line = fgets($client); |
| 148 |
$request .= $line; |
| 149 |
if (trim($line) === '') { |
| 150 |
// Headers ended, read body if present |
| 151 |
$headers = parse_http_headers($request); |
| 152 |
if (isset($headers['content-length'])) { |
| 153 |
$body = fread($client, (int)$headers['content-length']); |
| 154 |
$request .= $body; |
| 155 |
} |
| 156 |
break; |
| 157 |
} |
| 158 |
} |
| 159 |
|
| 160 |
// Process request |
| 161 |
$response = process_http_request($request); |
| 162 |
|
| 163 |
// Send response |
| 164 |
fwrite($client, $response); |
| 165 |
fclose($client); |
| 166 |
} |
| 167 |
|
| 168 |
fclose($socket); |
| 169 |
} |
| 170 |
|
| 171 |
/** |
| 172 |
* Handle HTTP request (for PHP built-in server) |
| 173 |
*/ |
| 174 |
function handle_http_request() { |
| 175 |
// Set CORS headers |
| 176 |
set_cors_headers(); |
| 177 |
|
| 178 |
// Handle OPTIONS (preflight) |
| 179 |
if ($_SERVER['REQUEST_METHOD'] === 'OPTIONS') { |
| 180 |
http_response_code(204); |
| 181 |
exit(0); |
| 182 |
} |
| 183 |
|
| 184 |
// Health check endpoint |
| 185 |
if ($_SERVER['REQUEST_METHOD'] === 'GET' && $_SERVER['REQUEST_URI'] === '/health') { |
| 186 |
handle_health_check(); |
| 187 |
exit(0); |
| 188 |
} |
| 189 |
|
| 190 |
// MCP endpoint - must be POST |
| 191 |
if ($_SERVER['REQUEST_METHOD'] !== 'POST') { |
| 192 |
http_response_code(405); |
| 193 |
header('Content-Type: application/json'); |
| 194 |
echo json_encode(['error' => 'Method not allowed. Use POST for MCP requests.']); |
| 195 |
exit(0); |
| 196 |
} |
| 197 |
|
| 198 |
// Check authentication if API key is set |
| 199 |
check_authentication(); |
| 200 |
|
| 201 |
// Read request body |
| 202 |
$request_body = file_get_contents('php://input'); |
| 203 |
|
| 204 |
if (empty($request_body)) { |
| 205 |
http_response_code(400); |
| 206 |
header('Content-Type: application/json'); |
| 207 |
echo json_encode(['error' => 'Empty request body']); |
| 208 |
exit(0); |
| 209 |
} |
| 210 |
|
| 211 |
try { |
| 212 |
// Parse JSON-RPC request |
| 213 |
$request = json_decode($request_body, true); |
| 214 |
if (json_last_error() !== JSON_ERROR_NONE) { |
| 215 |
throw new Exception('Invalid JSON: ' . json_last_error_msg()); |
| 216 |
} |
| 217 |
|
| 218 |
// Process MCP request |
| 219 |
$response = process_mcp_request($request); |
| 220 |
|
| 221 |
// Send response |
| 222 |
http_response_code(200); |
| 223 |
header('Content-Type: application/json'); |
| 224 |
echo json_encode($response); |
| 225 |
|
| 226 |
} catch (Exception $e) { |
| 227 |
http_response_code(500); |
| 228 |
header('Content-Type: application/json'); |
| 229 |
echo json_encode([ |
| 230 |
'jsonrpc' => '2.0', |
| 231 |
'id' => isset($request['id']) ? $request['id'] : null, |
| 232 |
'error' => [ |
| 233 |
'code' => -32603, |
| 234 |
'message' => $e->getMessage() |
| 235 |
] |
| 236 |
]); |
| 237 |
} |
| 238 |
} |
| 239 |
|
| 240 |
/** |
| 241 |
* Process HTTP request (for standalone server) |
| 242 |
*/ |
| 243 |
function process_http_request($http_request) { |
| 244 |
$lines = explode("\r\n", $http_request); |
| 245 |
$request_line = $lines[0]; |
| 246 |
$parts = explode(' ', $request_line); |
| 247 |
|
| 248 |
$method = $parts[0] ?? 'GET'; |
| 249 |
$path = $parts[1] ?? '/'; |
| 250 |
|
| 251 |
// Parse headers |
| 252 |
$headers = parse_http_headers($http_request); |
| 253 |
|
| 254 |
// Set default headers |
| 255 |
$response_headers = [ |
| 256 |
'HTTP/1.1 200 OK', |
| 257 |
'Content-Type: application/json', |
| 258 |
'Access-Control-Allow-Origin: *', |
| 259 |
'Access-Control-Allow-Methods: GET, POST, OPTIONS', |
| 260 |
'Access-Control-Allow-Headers: Content-Type, X-API-Key', |
| 261 |
]; |
| 262 |
|
| 263 |
// Handle OPTIONS (preflight) |
| 264 |
if ($method === 'OPTIONS') { |
| 265 |
$response_headers[0] = 'HTTP/1.1 204 No Content'; |
| 266 |
return implode("\r\n", $response_headers) . "\r\n\r\n"; |
| 267 |
} |
| 268 |
|
| 269 |
// Health check |
| 270 |
if ($method === 'GET' && $path === '/health') { |
| 271 |
$body = json_encode([ |
| 272 |
'status' => 'ok', |
| 273 |
'service' => 'wordpress-metasync-mcp', |
| 274 |
'wordpress_version' => get_bloginfo('version'), |
| 275 |
'metasync_version' => defined('METASYNC_VERSION') ? METASYNC_VERSION : 'unknown', |
| 276 |
'timestamp' => time() |
| 277 |
]); |
| 278 |
|
| 279 |
$response_headers[] = 'Content-Length: ' . strlen($body); |
| 280 |
return implode("\r\n", $response_headers) . "\r\n\r\n" . $body; |
| 281 |
} |
| 282 |
|
| 283 |
// MCP endpoint - must be POST |
| 284 |
if ($method !== 'POST') { |
| 285 |
$response_headers[0] = 'HTTP/1.1 405 Method Not Allowed'; |
| 286 |
$body = json_encode(['error' => 'Method not allowed']); |
| 287 |
$response_headers[] = 'Content-Length: ' . strlen($body); |
| 288 |
return implode("\r\n", $response_headers) . "\r\n\r\n" . $body; |
| 289 |
} |
| 290 |
|
| 291 |
// Check authentication |
| 292 |
$api_key = getenv('WP_MCP_API_KEY'); |
| 293 |
if ($api_key && (!isset($headers['x-api-key']) || $headers['x-api-key'] !== $api_key)) { |
| 294 |
$response_headers[0] = 'HTTP/1.1 401 Unauthorized'; |
| 295 |
$body = json_encode(['error' => 'Invalid or missing API key']); |
| 296 |
$response_headers[] = 'Content-Length: ' . strlen($body); |
| 297 |
return implode("\r\n", $response_headers) . "\r\n\r\n" . $body; |
| 298 |
} |
| 299 |
|
| 300 |
// Extract request body |
| 301 |
$body_start = strpos($http_request, "\r\n\r\n"); |
| 302 |
$request_body = $body_start !== false ? substr($http_request, $body_start + 4) : ''; |
| 303 |
|
| 304 |
if (empty($request_body)) { |
| 305 |
$response_headers[0] = 'HTTP/1.1 400 Bad Request'; |
| 306 |
$body = json_encode(['error' => 'Empty request body']); |
| 307 |
$response_headers[] = 'Content-Length: ' . strlen($body); |
| 308 |
return implode("\r\n", $response_headers) . "\r\n\r\n" . $body; |
| 309 |
} |
| 310 |
|
| 311 |
try { |
| 312 |
// Parse JSON-RPC request |
| 313 |
$request = json_decode($request_body, true); |
| 314 |
if (json_last_error() !== JSON_ERROR_NONE) { |
| 315 |
throw new Exception('Invalid JSON: ' . json_last_error_msg()); |
| 316 |
} |
| 317 |
|
| 318 |
// Process MCP request |
| 319 |
$response = process_mcp_request($request); |
| 320 |
$body = json_encode($response); |
| 321 |
|
| 322 |
$response_headers[] = 'Content-Length: ' . strlen($body); |
| 323 |
return implode("\r\n", $response_headers) . "\r\n\r\n" . $body; |
| 324 |
|
| 325 |
} catch (Exception $e) { |
| 326 |
$response_headers[0] = 'HTTP/1.1 500 Internal Server Error'; |
| 327 |
$body = json_encode([ |
| 328 |
'jsonrpc' => '2.0', |
| 329 |
'id' => isset($request['id']) ? $request['id'] : null, |
| 330 |
'error' => [ |
| 331 |
'code' => -32603, |
| 332 |
'message' => $e->getMessage() |
| 333 |
] |
| 334 |
]); |
| 335 |
$response_headers[] = 'Content-Length: ' . strlen($body); |
| 336 |
return implode("\r\n", $response_headers) . "\r\n\r\n" . $body; |
| 337 |
} |
| 338 |
} |
| 339 |
|
| 340 |
/** |
| 341 |
* Parse HTTP headers |
| 342 |
*/ |
| 343 |
function parse_http_headers($http_request) { |
| 344 |
$headers = []; |
| 345 |
$lines = explode("\r\n", $http_request); |
| 346 |
|
| 347 |
foreach ($lines as $line) { |
| 348 |
if (strpos($line, ':') !== false) { |
| 349 |
list($key, $value) = explode(':', $line, 2); |
| 350 |
$headers[strtolower(trim($key))] = trim($value); |
| 351 |
} |
| 352 |
} |
| 353 |
|
| 354 |
return $headers; |
| 355 |
} |
| 356 |
|
| 357 |
/** |
| 358 |
* Set CORS headers |
| 359 |
*/ |
| 360 |
function set_cors_headers() { |
| 361 |
header('Access-Control-Allow-Origin: *'); |
| 362 |
header('Access-Control-Allow-Methods: GET, POST, OPTIONS'); |
| 363 |
header('Access-Control-Allow-Headers: Content-Type, X-API-Key'); |
| 364 |
} |
| 365 |
|
| 366 |
/** |
| 367 |
* Check authentication |
| 368 |
*/ |
| 369 |
function check_authentication() { |
| 370 |
$api_key = getenv('WP_MCP_API_KEY'); |
| 371 |
if (!$api_key) { |
| 372 |
return; // No authentication required |
| 373 |
} |
| 374 |
|
| 375 |
$provided_key = $_SERVER['HTTP_X_API_KEY'] ?? ''; |
| 376 |
|
| 377 |
if ($provided_key !== $api_key) { |
| 378 |
http_response_code(401); |
| 379 |
header('Content-Type: application/json'); |
| 380 |
echo json_encode(['error' => 'Invalid or missing API key']); |
| 381 |
exit(0); |
| 382 |
} |
| 383 |
} |
| 384 |
|
| 385 |
/** |
| 386 |
* Handle health check |
| 387 |
*/ |
| 388 |
function handle_health_check() { |
| 389 |
global $metasync_mcp_server; |
| 390 |
|
| 391 |
$tools_count = count($metasync_mcp_server->get_tools()); |
| 392 |
|
| 393 |
http_response_code(200); |
| 394 |
header('Content-Type: application/json'); |
| 395 |
echo json_encode([ |
| 396 |
'status' => 'ok', |
| 397 |
'service' => 'wordpress-metasync-mcp', |
| 398 |
'wordpress_version' => get_bloginfo('version'), |
| 399 |
'metasync_version' => defined('METASYNC_VERSION') ? METASYNC_VERSION : 'unknown', |
| 400 |
'tools_count' => $tools_count, |
| 401 |
'timestamp' => time() |
| 402 |
]); |
| 403 |
} |
| 404 |
|
| 405 |
/** |
| 406 |
* Process MCP JSON-RPC request |
| 407 |
* |
| 408 |
* @param array $request JSON-RPC request |
| 409 |
* @return array JSON-RPC response |
| 410 |
*/ |
| 411 |
function process_mcp_request($request) { |
| 412 |
global $metasync_mcp_server; |
| 413 |
|
| 414 |
$method = $request['method'] ?? ''; |
| 415 |
$params = $request['params'] ?? []; |
| 416 |
$id = $request['id'] ?? null; |
| 417 |
|
| 418 |
switch ($method) { |
| 419 |
case 'initialize': |
| 420 |
return handle_initialize($id, $params); |
| 421 |
|
| 422 |
case 'notifications/initialized': |
| 423 |
// Client confirms initialization - no response needed for notification |
| 424 |
return null; |
| 425 |
|
| 426 |
case 'tools/list': |
| 427 |
return handle_tools_list($id); |
| 428 |
|
| 429 |
case 'tools/call': |
| 430 |
return handle_tools_call($id, $params); |
| 431 |
|
| 432 |
case 'ping': |
| 433 |
return [ |
| 434 |
'jsonrpc' => '2.0', |
| 435 |
'id' => $id, |
| 436 |
'result' => [ |
| 437 |
'status' => 'ok', |
| 438 |
'timestamp' => time() |
| 439 |
] |
| 440 |
]; |
| 441 |
|
| 442 |
default: |
| 443 |
throw new Exception("Unknown method: $method"); |
| 444 |
} |
| 445 |
} |
| 446 |
|
| 447 |
/** |
| 448 |
* Handle initialize request |
| 449 |
*/ |
| 450 |
function handle_initialize($id, $params) { |
| 451 |
$client_info = $params['clientInfo'] ?? []; |
| 452 |
|
| 453 |
return [ |
| 454 |
'jsonrpc' => '2.0', |
| 455 |
'id' => $id, |
| 456 |
'result' => [ |
| 457 |
'protocolVersion' => '2024-11-05', |
| 458 |
'capabilities' => [ |
| 459 |
'tools' => (object)[] |
| 460 |
], |
| 461 |
'serverInfo' => [ |
| 462 |
'name' => 'wordpress-metasync', |
| 463 |
'version' => defined('METASYNC_VERSION') ? METASYNC_VERSION : '2.0.0' |
| 464 |
] |
| 465 |
] |
| 466 |
]; |
| 467 |
} |
| 468 |
|
| 469 |
/** |
| 470 |
* Handle tools/list request |
| 471 |
*/ |
| 472 |
function handle_tools_list($id) { |
| 473 |
global $metasync_mcp_server; |
| 474 |
|
| 475 |
$tools = []; |
| 476 |
$tool_objects = $metasync_mcp_server->get_tools(); |
| 477 |
|
| 478 |
foreach ($tool_objects as $tool) { |
| 479 |
$tools[] = [ |
| 480 |
'name' => $tool->get_name(), |
| 481 |
'description' => $tool->get_description(), |
| 482 |
'inputSchema' => $tool->get_input_schema() |
| 483 |
]; |
| 484 |
} |
| 485 |
|
| 486 |
return [ |
| 487 |
'jsonrpc' => '2.0', |
| 488 |
'id' => $id, |
| 489 |
'result' => [ |
| 490 |
'tools' => $tools |
| 491 |
] |
| 492 |
]; |
| 493 |
} |
| 494 |
|
| 495 |
/** |
| 496 |
* Handle tools/call request |
| 497 |
*/ |
| 498 |
function handle_tools_call($id, $params) { |
| 499 |
global $metasync_mcp_server; |
| 500 |
|
| 501 |
$tool_name = $params['name'] ?? ''; |
| 502 |
$arguments = $params['arguments'] ?? []; |
| 503 |
|
| 504 |
if (empty($tool_name)) { |
| 505 |
throw new Exception('Tool name is required'); |
| 506 |
} |
| 507 |
|
| 508 |
// Find tool |
| 509 |
$tool = $metasync_mcp_server->get_tool($tool_name); |
| 510 |
if (!$tool) { |
| 511 |
throw new Exception("Tool not found: $tool_name"); |
| 512 |
} |
| 513 |
|
| 514 |
// Execute tool |
| 515 |
$result = $tool->execute($arguments); |
| 516 |
|
| 517 |
// Format result as MCP response |
| 518 |
$content = []; |
| 519 |
|
| 520 |
if (is_array($result) || is_object($result)) { |
| 521 |
$content[] = [ |
| 522 |
'type' => 'text', |
| 523 |
'text' => json_encode($result, JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES) |
| 524 |
]; |
| 525 |
} else { |
| 526 |
$content[] = [ |
| 527 |
'type' => 'text', |
| 528 |
'text' => (string)$result |
| 529 |
]; |
| 530 |
} |
| 531 |
|
| 532 |
return [ |
| 533 |
'jsonrpc' => '2.0', |
| 534 |
'id' => $id, |
| 535 |
'result' => [ |
| 536 |
'content' => $content, |
| 537 |
'isError' => false |
| 538 |
] |
| 539 |
]; |
| 540 |
} |
| 541 |
|
