diff --git a/src/Server/McpServiceProvider.php b/src/Server/McpServiceProvider.php
index 4bbd9af..b802373 100644
--- a/src/Server/McpServiceProvider.php
+++ b/src/Server/McpServiceProvider.php
@@ -25,6 +25,7 @@ public function register(): void
 
     public function boot(): void
     {
+        $this->registerMcpScope();
         $this->registerRoutes();
         $this->registerContainerCallbacks();
 
@@ -96,4 +97,11 @@ protected function registerCommands(): void
             InspectorCommand::class,
         ]);
     }
+
+    protected function registerMcpScope(): void
+    {
+        $this->app->booted(function (): void {
+            Registrar::ensureMcpScope();
+        });
+    }
 }
diff --git a/src/Server/Registrar.php b/src/Server/Registrar.php
index c0dbaf3..063d56b 100644
--- a/src/Server/Registrar.php
+++ b/src/Server/Registrar.php
@@ -84,7 +84,7 @@ public function servers(): array
 
     public function oauthRoutes(string $oauthPrefix = 'oauth'): void
     {
-        $this->maybeAddMcpScope();
+        static::ensureMcpScope();
         Router::get('/.well-known/oauth-protected-resource/{path?}', fn (?string $path = '') => response()->json([
             'resource' => url('/'.$path),
             'authorization_servers' => [url('/'.$path)],
@@ -108,7 +108,7 @@ public function oauthRoutes(string $oauthPrefix = 'oauth'): void
     /**
      * @return array<string, string>
      */
-    protected function maybeAddMcpScope(): array
+    public static function ensureMcpScope(): array
     {
         if (class_exists('Laravel\Passport\Passport') === false) {
             return [];
@@ -124,6 +124,14 @@ protected function maybeAddMcpScope(): array
         return $current;
     }
 
+    /**
+     * @return array<string, string>
+     */
+    protected function maybeAddMcpScope(): array
+    {
+        return static::ensureMcpScope();
+    }
+
     /**
      * @param  class-string<Server>  $serverClass
      * @param  callable(): Transport  $transportFactory
diff --git a/tests/Unit/Server/McpServiceProviderTest.php b/tests/Unit/Server/McpServiceProviderTest.php
new file mode 100644
index 0000000..4741f0d
--- /dev/null
+++ b/tests/Unit/Server/McpServiceProviderTest.php
@@ -0,0 +1,30 @@
+<?php
+
+declare(strict_types=1);
+
+use Laravel\Mcp\Server\McpServiceProvider;
+
+it('registers mcp scope during boot', function (): void {
+    if (! class_exists('Laravel\Passport\Passport')) {
+        eval('
+            namespace Laravel\Passport;
+            class Passport {
+                public static $scopes = [];
+                public static function tokensCan($scopes) {
+                    self::$scopes = $scopes;
+                }
+            }
+        ');
+    }
+
+    \Laravel\Passport\Passport::$scopes = ['custom' => 'Custom scope'];
+
+    $provider = new McpServiceProvider($this->app);
+    $provider->register();
+    $provider->boot();
+
+    $this->app->boot();
+
+    expect(\Laravel\Passport\Passport::$scopes)->toHaveKey('mcp:use');
+    expect(\Laravel\Passport\Passport::$scopes['custom'])->toBe('Custom scope');
+});