Kick off the SDK based on Symfony's MCP SDK

examples/cli/README.md

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+# Example app with CLI
+
+This is just for testing and debugging purposes.
+
+
+Install and create symlink with:
+
+```bash
+cd /path/to/your/project/examples/cli
+composer update
+rm -rf vendor/mcp/sdk/src
+ln -s /path/to/your/project/src /path/to/your/project/examples/cli/vendor/mcp/sdk/src
+```
+
+Run the CLI with:
+
+```bash
+DEBUG=1 php index.php
+```
+
+You will see debug outputs to help you understand what is happening.
+
+In this terminal you can now test add some json strings. See `example-requests.json`.
+
+Run with Inspector:
+
+```bash
+npx @modelcontextprotocol/inspector php index.php
+```

examples/cli/composer.json

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+{
+    "name": "mcp/cli-server-example",
+    "description": "An example application for CLI",
+    "license": "MIT",
+    "type": "project",
+    "authors": [
+        {
+            "name": "Tobias Nyholm",
+            "email": "tobias.nyholm@gmail.com"
+        }
+    ],
+    "require": {
+        "php": ">=8.1",
+        "mcp/sdk": "@dev",
+        "symfony/console": "^7.2"
+    },
+    "minimum-stability": "stable",
+    "autoload": {
+        "psr-4": {
+            "App\\": "src/"
+        }
+    },
+    "repositories": [
+        { "type": "path", "url": "../../" }
+    ]
+}
+

examples/cli/example-requests.json

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+[
+  {"jsonrpc": "2.0", "id": 1, "method": "resources/list", "params": []},
+  {"jsonrpc": "2.0", "id": 2, "method": "resources/read", "params": {"uri": "file:///project/src/main.rs"}},
+
+  {"jsonrpc": "2.0", "id": 1, "method": "tools/list"},
+  {"jsonrpc": "2.0", "id": 2, "method": "tools/call", "params": {"name": "Current time"}},
+  {"jsonrpc": "2.0", "id": 2, "method": "tools/call", "params": {"name": "Current time","arguments": {"format": "Y-m-d"}}},
+
+  {"jsonrpc": "2.0", "id": 1, "method": "prompts/list"},
+  {"jsonrpc": "2.0", "id": 2 ,"method": "prompts/get", "params": {"name": "Greet"}},
+  {"jsonrpc": "2.0", "id": 2 ,"method": "prompts/get", "params": {"name": "Greet", "arguments": { "firstName": "Tobias" }}}
+]

examples/cli/index.php

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+<?php
+
+/*
+ * This file is part of the official PHP MCP SDK.
+ *
+ * A collaboration between Symfony and the PHP Foundation.
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+require __DIR__.'/vendor/autoload.php';
+
+use Symfony\Component\Console as SymfonyConsole;
+use Symfony\Component\Console\Output\OutputInterface;
+
+$debug = (bool) ($_SERVER['DEBUG'] ?? false);
+
+// Setup input, output and logger
+$input = new SymfonyConsole\Input\ArgvInput($argv);
+$output = new SymfonyConsole\Output\ConsoleOutput($debug ? OutputInterface::VERBOSITY_VERY_VERBOSE : OutputInterface::VERBOSITY_NORMAL);
+$logger = new SymfonyConsole\Logger\ConsoleLogger($output);
+
+// Configure the JsonRpcHandler and build the functionality
+$jsonRpcHandler = new Mcp\Server\JsonRpcHandler(
+    new Mcp\Message\Factory(),
+    App\Builder::buildRequestHandlers(),
+    App\Builder::buildNotificationHandlers(),
+    $logger
+);
+
+// Set up the server
+$sever = new Mcp\Server($jsonRpcHandler, $logger);
+
+// Create the transport layer using Symfony Console
+$transport = new Mcp\Server\Transport\Stdio\SymfonyConsoleTransport($input, $output);
+
+// Start our application
+$sever->connect($transport);

examples/cli/src/Builder.php

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+<?php
+
+/*
+ * This file is part of the official PHP MCP SDK.
+ *
+ * A collaboration between Symfony and the PHP Foundation.
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace App;
+
+use Mcp\Capability\PromptChain;
+use Mcp\Capability\ResourceChain;
+use Mcp\Capability\ToolChain;
+use Mcp\Server\NotificationHandler\InitializedHandler;
+use Mcp\Server\NotificationHandlerInterface;
+use Mcp\Server\RequestHandler\InitializeHandler;
+use Mcp\Server\RequestHandler\PingHandler;
+use Mcp\Server\RequestHandler\PromptGetHandler;
+use Mcp\Server\RequestHandler\PromptListHandler;
+use Mcp\Server\RequestHandler\ResourceListHandler;
+use Mcp\Server\RequestHandler\ResourceReadHandler;
+use Mcp\Server\RequestHandler\ToolCallHandler;
+use Mcp\Server\RequestHandler\ToolListHandler;
+use Mcp\Server\RequestHandlerInterface;
+
+/**
+ * @author Tobias Nyholm <tobias.nyholm@gmail.com>
+ */
+class Builder
+{
+    /**
+     * @return list<RequestHandlerInterface>
+     */
+    public static function buildRequestHandlers(): array
+    {
+        $promptManager = new PromptChain([
+            new ExamplePrompt(),
+        ]);
+
+        $resourceManager = new ResourceChain([
+            new ExampleResource(),
+        ]);
+
+        $toolManager = new ToolChain([
+            new ExampleTool(),
+        ]);
+
+        return [
+            new InitializeHandler(),
+            new PingHandler(),
+            new PromptListHandler($promptManager),
+            new PromptGetHandler($promptManager),
+            new ResourceListHandler($resourceManager),
+            new ResourceReadHandler($resourceManager),
+            new ToolCallHandler($toolManager),
+            new ToolListHandler($toolManager),
+        ];
+    }
+
+    /**
+     * @return list<NotificationHandlerInterface>
+     */
+    public static function buildNotificationHandlers(): array
+    {
+        return [
+            new InitializedHandler(),
+        ];
+    }
+}

examples/cli/src/ExamplePrompt.php

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+<?php
+
+/*
+ * This file is part of the official PHP MCP SDK.
+ *
+ * A collaboration between Symfony and the PHP Foundation.
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace App;
+
+use Mcp\Capability\Prompt\MetadataInterface;
+use Mcp\Capability\Prompt\PromptGet;
+use Mcp\Capability\Prompt\PromptGetResult;
+use Mcp\Capability\Prompt\PromptGetResultMessages;
+use Mcp\Capability\Prompt\PromptGetterInterface;
+
+/**
+ * @author Tobias Nyholm <tobias.nyholm@gmail.com>
+ */
+class ExamplePrompt implements MetadataInterface, PromptGetterInterface
+{
+    public function get(PromptGet $input): PromptGetResult
+    {
+        $firstName = $input->arguments['first name'] ?? null;
+
+        return new PromptGetResult(
+            $this->getDescription(),
+            [new PromptGetResultMessages(
+                'user',
+                \sprintf('Hello %s', $firstName ?? 'World')
+            )]
+        );
+    }
+
+    public function getName(): string
+    {
+        return 'Greet';
+    }
+
+    public function getDescription(): ?string
+    {
+        return 'Greet a person with a nice message';
+    }
+
+    public function getArguments(): array
+    {
+        return [
+            [
+                'name' => 'first name',
+                'description' => 'The name of the person to greet',
+                'required' => false,
+            ],
+        ];
+    }
+}

examples/cli/src/ExampleResource.php

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+<?php
+
+/*
+ * This file is part of the official PHP MCP SDK.
+ *
+ * A collaboration between Symfony and the PHP Foundation.
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace App;
+
+use Mcp\Capability\Resource\MetadataInterface;
+use Mcp\Capability\Resource\ResourceRead;
+use Mcp\Capability\Resource\ResourceReaderInterface;
+use Mcp\Capability\Resource\ResourceReadResult;
+
+/**
+ * @author Tobias Nyholm <tobias.nyholm@gmail.com>
+ */
+class ExampleResource implements MetadataInterface, ResourceReaderInterface
+{
+    public function read(ResourceRead $input): ResourceReadResult
+    {
+        return new ResourceReadResult(
+            'Content of '.$this->getName(),
+            $this->getUri(),
+        );
+    }
+
+    public function getUri(): string
+    {
+        return 'file:///project/src/main.rs';
+    }
+
+    public function getName(): string
+    {
+        return 'My resource';
+    }
+
+    public function getDescription(): ?string
+    {
+        return 'This is just an example';
+    }
+
+    public function getMimeType(): ?string
+    {
+        return null;
+    }
+
+    public function getSize(): ?int
+    {
+        return null;
+    }
+}

examples/cli/src/ExampleTool.php

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+<?php
+
+/*
+ * This file is part of the official PHP MCP SDK.
+ *
+ * A collaboration between Symfony and the PHP Foundation.
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace App;
+
+use Mcp\Capability\Tool\MetadataInterface;
+use Mcp\Capability\Tool\ToolCall;
+use Mcp\Capability\Tool\ToolCallResult;
+use Mcp\Capability\Tool\ToolExecutorInterface;
+
+/**
+ * @author Tobias Nyholm <tobias.nyholm@gmail.com>
+ */
+class ExampleTool implements MetadataInterface, ToolExecutorInterface
+{
+    public function call(ToolCall $input): ToolCallResult
+    {
+        $format = $input->arguments['format'] ?? 'Y-m-d H:i:s';
+
+        return new ToolCallResult(
+            (new \DateTime('now', new \DateTimeZone('UTC')))->format($format)
+        );
+    }
+
+    public function getName(): string
+    {
+        return 'Current time';
+    }
+
+    public function getDescription(): string
+    {
+        return 'Returns the current time in UTC';
+    }
+
+    public function getInputSchema(): array
+    {
+        return [
+            'type' => 'object',
+            'properties' => [
+                'format' => [
+                    'type' => 'string',
+                    'description' => 'The format of the time, e.g. "Y-m-d H:i:s"',
+                    'default' => 'Y-m-d H:i:s',
+                ],
+            ],
+            'required' => [],
+        ];
+    }
+}