diff --git a/lib/WorkOS.php b/lib/WorkOS.php
index fbc9536e..935e32e3 100644
--- a/lib/WorkOS.php
+++ b/lib/WorkOS.php
@@ -43,8 +43,9 @@ public static function getApiKey()
             return self::$apiKey;
         }
 
-        if (getenv("WORKOS_API_KEY")) {
-            self::$apiKey = getenv("WORKOS_API_KEY");
+        $envValue = self::getEnvVariable("WORKOS_API_KEY");
+        if ($envValue) {
+            self::$apiKey = $envValue;
             return self::$apiKey;
         }
 
@@ -71,8 +72,9 @@ public static function getClientId()
             return self::$clientId;
         }
 
-        if (getenv("WORKOS_CLIENT_ID")) {
-            self::$clientId = getenv("WORKOS_CLIENT_ID");
+        $envValue = self::getEnvVariable("WORKOS_CLIENT_ID");
+        if ($envValue) {
+            self::$clientId = $envValue;
             return self::$clientId;
         }
 
@@ -135,4 +137,29 @@ public static function getVersion()
     {
         return self::$version;
     }
+
+    /**
+     * Get environment variable with fallback to cached config sources.
+     * Checks in order: getenv(), $_ENV, $_SERVER
+     *
+     * @param string $key Environment variable name
+     * @return string|false The environment variable value or false if not found
+     */
+    private static function getEnvVariable($key)
+    {
+        $value = getenv($key);
+        if ($value !== false && $value !== '') {
+            return $value;
+        }
+
+        if (isset($_ENV[$key]) && $_ENV[$key] !== '') {
+            return $_ENV[$key];
+        }
+
+        if (isset($_SERVER[$key]) && $_SERVER[$key] !== '') {
+            return $_SERVER[$key];
+        }
+
+        return false;
+    }
 }
diff --git a/tests/WorkOS/WorkOSTest.php b/tests/WorkOS/WorkOSTest.php
new file mode 100644
index 00000000..2385aee0
--- /dev/null
+++ b/tests/WorkOS/WorkOSTest.php
@@ -0,0 +1,59 @@
+<?php
+
+namespace WorkOS;
+
+use PHPUnit\Framework\TestCase;
+
+class WorkOSTest extends TestCase
+{
+    protected function setUp(): void
+    {
+        WorkOS::setApiKey(null);
+        WorkOS::setClientId(null);
+
+        putenv("WORKOS_API_KEY=");
+        putenv("WORKOS_CLIENT_ID=");
+
+        unset($_ENV['WORKOS_API_KEY']);
+        unset($_ENV['WORKOS_CLIENT_ID']);
+        unset($_SERVER['WORKOS_API_KEY']);
+        unset($_SERVER['WORKOS_CLIENT_ID']);
+    }
+
+    protected function tearDown(): void
+    {
+        WorkOS::setApiKey(null);
+        WorkOS::setClientId(null);
+
+        putenv("WORKOS_API_KEY=");
+        putenv("WORKOS_CLIENT_ID=");
+
+        unset($_ENV['WORKOS_API_KEY']);
+        unset($_ENV['WORKOS_CLIENT_ID']);
+        unset($_SERVER['WORKOS_API_KEY']);
+        unset($_SERVER['WORKOS_CLIENT_ID']);
+    }
+
+    public function testGetApiKeyFromEnvSuperglobal()
+    {
+        $_ENV['WORKOS_API_KEY'] = "pk_test_env_superglobal";
+
+        $this->assertEquals("pk_test_env_superglobal", WorkOS::getApiKey());
+    }
+
+    public function testGetClientIdFromEnvSuperglobal()
+    {
+        $_ENV['WORKOS_CLIENT_ID'] = "client_test_env_superglobal";
+
+        $this->assertEquals("client_test_env_superglobal", WorkOS::getClientId());
+    }
+
+    public function testLaravelConfigCachingScenario()
+    {
+        $_ENV['WORKOS_API_KEY'] = "pk_test_laravel_cached";
+        $_ENV['WORKOS_CLIENT_ID'] = "client_test_laravel_cached";
+
+        $this->assertEquals("pk_test_laravel_cached", WorkOS::getApiKey());
+        $this->assertEquals("client_test_laravel_cached", WorkOS::getClientId());
+    }
+}