feat: add stateless mode support for HTTP transports

Adds stateless configuration option for both dedicated and integrated HTTP transports. Requires server package 3.3+ for stateless StreamableHttpServerTransport support.

Author: CodeWithKyrian

composer.json

@@ -28,7 +28,7 @@
     "require": {
         "php": "^8.1",
         "laravel/framework": "^9.46 || ^10.34 || ^11.29 || ^12.0",
-        "php-mcp/server": "^3.2"
+        "php-mcp/server": "^3.3"
     },
     "require-dev": {
         "laravel/pint": "^1.13",

config/mcp.php

@@ -87,6 +87,7 @@
             'host' => env('MCP_HTTP_DEDICATED_HOST', '127.0.0.1'),
             'port' => (int) env('MCP_HTTP_DEDICATED_PORT', 8090),
             'path_prefix' => env('MCP_HTTP_DEDICATED_PATH_PREFIX', 'mcp'),
+            'stateless' => (bool) env('MCP_HTTP_DEDICATED_STATELESS', false),
             'ssl_context_options' => [],
             'enable_json_response' => (bool) env('MCP_HTTP_DEDICATED_JSON_RESPONSE', true),
             'event_store' => null, // FQCN or null
@@ -96,6 +97,7 @@
             'enabled' => (bool) env('MCP_HTTP_INTEGRATED_ENABLED', true),
             'legacy' => (bool) env('MCP_HTTP_INTEGRATED_LEGACY', false),
             'route_prefix' => env('MCP_HTTP_INTEGRATED_ROUTE_PREFIX', 'mcp'),
+            'stateless' => (bool) env('MCP_HTTP_INTEGRATED_STATELESS', false),
             'middleware' => ['api'],
             'domain' => env('MCP_HTTP_INTEGRATED_DOMAIN'),
             'sse_poll_interval' => (int) env('MCP_HTTP_INTEGRATED_SSE_POLL_SECONDS', 1),