feat: Add support for passing along custom headers for MCP connections (#45)

Author: jormeijer

composer.json

@@ -31,7 +31,7 @@
         "laravel/prompts": "^0.3.5",
         "phpstan/phpstan": "^2.1",
         "phpunit/phpunit": "^11.0 || ^12.0",
-        "swisnl/mcp-client": "^0.4 || ^0.5",
+        "swisnl/mcp-client": "^0.5.1 || ^0.6",
         "swisnl/php-http-fixture-client": "^3.1",
         "symfony/console": "^7.2",
         "vlucas/phpdotenv": "^5.6"

src/Mcp/McpConnection.php

@@ -70,11 +70,15 @@ public function __construct(
      * Create a new MCP connection for a given Streamable HTTP endpoint
      *
      * @param string $endpoint
+     * @param array<string, string> $headers
      * @return self
      */
-    public static function forStreamableHttp(string $endpoint): self
+    public static function forStreamableHttp(string $endpoint, array $headers = []): self
     {
-        $client = Client::withStreamableHttp($endpoint);
+        $client = Client::withStreamableHttp(
+            endpoint: $endpoint,
+            headers: $headers,
+        );
 
         $connection = new self($client, 'MCP server');
         $connection->withCacheKey('mcp_tools_' . md5($endpoint));
@@ -86,11 +90,15 @@ public static function forStreamableHttp(string $endpoint): self
      * Create a new MCP connection for a given SSE endpoint
      *
      * @param string $endpoint
+     * @param array<string, string> $headers
      * @return self
      */
-    public static function forSse(string $endpoint): self
+    public static function forSse(string $endpoint, array $headers = []): self
     {
-        $client = Client::withSse($endpoint);
+        $client = Client::withSse(
+            endpoint: $endpoint,
+            headers: $headers,
+        );
 
         $connection = new self($client, 'MCP server');
         $connection->withCacheKey('mcp_tools_' . md5($endpoint));