[Client] Feat: Implement MCP client component #192
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| Original file line number | Diff line number | Diff line change | ||||
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| # Client Examples | ||||||
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| These examples demonstrate how to use the MCP PHP Client SDK. | ||||||
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| ## STDIO Client | ||||||
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| Connects to an MCP server running as a child process: | ||||||
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| ```bash | ||||||
| php examples/client/stdio_discovery_calculator.php | ||||||
| ``` | ||||||
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| ## HTTP Client | ||||||
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| Connects to an MCP server over HTTP: | ||||||
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| ```bash | ||||||
| # First, start an HTTP server | ||||||
| php -S localhost:8080 examples/http-discovery-userprofile/server.php | ||||||
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| # Then run the client | ||||||
| php examples/client/http_discovery_userprofile.php | ||||||
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| ``` | ||||||
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| ## Requirements | ||||||
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| All examples require the server examples to be available. The STDIO examples spawn the server process, while the HTTP examples connect to a running HTTP server. | ||||||
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| <?php | ||
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| /** | ||
| * HTTP Client Communication Example | ||
| * | ||
| * This example demonstrates server-to-client communication over HTTP: | ||
| * - Logging notifications | ||
| * - Progress notifications (via SSE streaming) | ||
| * - Sampling requests (mocked LLM response) | ||
| * | ||
| * Usage: | ||
| * 1. Start the server: php -S 127.0.0.1:8000 examples/server/client-communication/server.php | ||
| * 2. Run this script: php examples/client/http_client_communication.php | ||
| * | ||
| * Note: PHP's built-in server works for listing tools, calling tools, and receiving | ||
| * progress/logging notifications. However, sampling requires a concurrent-capable server | ||
| * (e.g., Symfony CLI, PHP-FPM) since the server must process the client's sampling | ||
| * response while the original tool request is still pending. | ||
| * | ||
| * Eg. symfony serve --passthru=examples/server/client-communication/server.php --no-tls | ||
| */ | ||
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| declare(strict_types=1); | ||
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| require_once __DIR__ . '/../../vendor/autoload.php'; | ||
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| use Mcp\Client\Client; | ||
| use Mcp\Client\Handler\LoggingNotificationHandler; | ||
| use Mcp\Client\Handler\SamplingRequestHandler; | ||
| use Mcp\Client\Transport\HttpClientTransport; | ||
| use Mcp\Schema\ClientCapabilities; | ||
| use Mcp\Schema\Content\TextContent; | ||
| use Mcp\Schema\Enum\Role; | ||
| use Mcp\Schema\Notification\LoggingMessageNotification; | ||
| use Mcp\Schema\Request\CreateSamplingMessageRequest; | ||
| use Mcp\Schema\Result\CreateSamplingMessageResult; | ||
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| $endpoint = 'http://127.0.0.1:8000'; | ||
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| $loggingNotificationHandler = new LoggingNotificationHandler(function (LoggingMessageNotification $n) { | ||
| echo "[LOG {$n->level->value}] {$n->data}\n"; | ||
| }); | ||
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| $samplingRequestHandler = new SamplingRequestHandler(function (CreateSamplingMessageRequest $request): CreateSamplingMessageResult { | ||
| echo "[SAMPLING] Server requested LLM sampling (max {$request->maxTokens} tokens)\n"; | ||
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| $mockResponse = "Based on the incident analysis, I recommend: 1) Activate the on-call team, " . | ||
| "2) Isolate affected systems, 3) Begin root cause analysis, 4) Prepare stakeholder communication."; | ||
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| return new CreateSamplingMessageResult( | ||
| role: Role::Assistant, | ||
| content: new TextContent($mockResponse), | ||
| model: 'mock-gpt-4', | ||
| stopReason: 'end_turn', | ||
| ); | ||
| }); | ||
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| $client = Client::builder() | ||
| ->setClientInfo('HTTP Client Communication Test', '1.0.0') | ||
| ->setInitTimeout(30) | ||
| ->setRequestTimeout(120) | ||
| ->setCapabilities(new ClientCapabilities(sampling: true)) | ||
| ->addNotificationHandler($loggingNotificationHandler) | ||
| ->addRequestHandler($samplingRequestHandler) | ||
| ->build(); | ||
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| $transport = new HttpClientTransport(endpoint: $endpoint); | ||
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| try { | ||
| echo "Connecting to MCP server at {$endpoint}...\n"; | ||
| $client->connect($transport); | ||
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| $serverInfo = $client->getServerInfo(); | ||
| echo "Connected to: " . ($serverInfo?->name ?? 'unknown') . "\n\n"; | ||
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| echo "Available tools:\n"; | ||
| $toolsResult = $client->listTools(); | ||
| foreach ($toolsResult->tools as $tool) { | ||
| echo " - {$tool->name}\n"; | ||
| } | ||
| echo "\n"; | ||
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| echo "Calling 'run_dataset_quality_checks'...\n\n"; | ||
| $result = $client->callTool( | ||
| name: 'run_dataset_quality_checks', | ||
| arguments: ['dataset' => 'sales_transactions_q4'], | ||
| onProgress: function (float $progress, ?float $total, ?string $message) { | ||
| $percent = $total > 0 ? round(($progress / $total) * 100) : '?'; | ||
| echo "[PROGRESS {$percent}%] {$message}\n"; | ||
| } | ||
| ); | ||
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| echo "\nResult:\n"; | ||
| foreach ($result->content as $content) { | ||
| if ($content instanceof TextContent) { | ||
| echo $content->text . "\n"; | ||
| } | ||
| } | ||
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| echo "\nCalling 'coordinate_incident_response'...\n\n"; | ||
| $result = $client->callTool( | ||
| name: 'coordinate_incident_response', | ||
| arguments: ['incidentTitle' => 'Database connection pool exhausted'], | ||
| onProgress: function (float $progress, ?float $total, ?string $message) { | ||
| $percent = $total > 0 ? round(($progress / $total) * 100) : '?'; | ||
| echo "[PROGRESS {$percent}%] {$message}\n"; | ||
| } | ||
| ); | ||
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| echo "\nResult:\n"; | ||
| foreach ($result->content as $content) { | ||
| if ($content instanceof TextContent) { | ||
| echo $content->text . "\n"; | ||
| } | ||
| } | ||
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| } catch (\Throwable $e) { | ||
| echo "Error: {$e->getMessage()}\n"; | ||
| echo $e->getTraceAsString() . "\n"; | ||
| } finally { | ||
| $client->disconnect(); | ||
| } |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,69 @@ | ||
| <?php | ||
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| /** | ||
| * HTTP Client Example | ||
| * | ||
| * This example demonstrates how to use the MCP client with an HTTP transport | ||
| * to communicate with a remote MCP server over HTTP. | ||
| * | ||
| * Usage: php examples/client/http_discovery_calculator.php | ||
| * | ||
| * Before running, start an HTTP MCP server: | ||
| * php -S localhost:8080 examples/server/http-discovery-calculator/server.php | ||
| */ | ||
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| declare(strict_types=1); | ||
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| require_once __DIR__ . '/../../vendor/autoload.php'; | ||
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| use Mcp\Client\Client; | ||
| use Mcp\Client\Transport\HttpClientTransport; | ||
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| $endpoint = 'http://localhost:8000'; | ||
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| $client = Client::builder() | ||
| ->setClientInfo('HTTP Example Client', '1.0.0') | ||
| ->setInitTimeout(30) | ||
| ->setRequestTimeout(60) | ||
| ->build(); | ||
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| $transport = new HttpClientTransport($endpoint); | ||
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| try { | ||
| echo "Connecting to MCP server at {$endpoint}...\n"; | ||
| $client->connect($transport); | ||
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| echo "Connected! Server info:\n"; | ||
| $serverInfo = $client->getServerInfo(); | ||
| echo " Name: " . ($serverInfo?->name ?? 'unknown') . "\n"; | ||
| echo " Version: " . ($serverInfo?->version ?? 'unknown') . "\n\n"; | ||
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| echo "Available tools:\n"; | ||
| $toolsResult = $client->listTools(); | ||
| foreach ($toolsResult->tools as $tool) { | ||
| echo " - {$tool->name}: {$tool->description}\n"; | ||
| } | ||
| echo "\n"; | ||
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| echo "Available resources:\n"; | ||
| $resourcesResult = $client->listResources(); | ||
| foreach ($resourcesResult->resources as $resource) { | ||
| echo " - {$resource->uri}: {$resource->name}\n"; | ||
| } | ||
| echo "\n"; | ||
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| echo "Available prompts:\n"; | ||
| $promptsResult = $client->listPrompts(); | ||
| foreach ($promptsResult->prompts as $prompt) { | ||
| echo " - {$prompt->name}: {$prompt->description}\n"; | ||
| } | ||
| echo "\n"; | ||
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| } catch (\Throwable $e) { | ||
| echo "Error: {$e->getMessage()}\n"; | ||
| echo $e->getTraceAsString() . "\n"; | ||
| } finally { | ||
| echo "Disconnecting...\n"; | ||
| $client->disconnect(); | ||
| echo "Done.\n"; | ||
| } |
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client example expects port 8000 and server example moved
not sure which one you wanted: