diff --git a/decorator_func_test.py b/decorator_func_test.py
new file mode 100644
index 0000000..0e5db27
--- /dev/null
+++ b/decorator_func_test.py
@@ -0,0 +1,70 @@
+#!/usr/bin/env python3
+
+import asyncio
+import contextvars
+from functools import wraps
+from typing import Any, Callable
+
+
+# https://github.com/aws/bedrock-agentcore-sdk-python/blob/52bc1946e3d007a168499069f4ce0a265371cd88/src/bedrock_agentcore/identity/auth.py#L220
+# Apache-2.0 license
+def requires_api_key(*, provider_name: str, into: str = "api_key") -> Callable:
+    def decorator(func: Callable) -> Callable:
+        # TODO
+        async def _get_api_key():
+            return f'[[TEST_API_KEY:${provider_name}]]'  # TODO
+
+        @wraps(func)
+        async def async_wrapper(*args: Any, **kwargs: Any) -> Any:
+            api_key = await _get_api_key()
+            kwargs[into] = api_key
+            return await func(*args, **kwargs)
+
+        @wraps(func)
+        def sync_wrapper(*args: Any, **kwargs: Any) -> Any:
+            if _has_running_loop():
+                # for async env, eg. runtime
+                ctx = contextvars.copy_context()
+                import concurrent.futures
+
+                with concurrent.futures.ThreadPoolExecutor() as executor:
+                    future = executor.submit(ctx.run, asyncio.run, _get_api_key())
+                    api_key = future.result()
+            else:
+                # for sync env, eg. local dev
+                api_key = asyncio.run(_get_api_key())
+
+            kwargs[into] = api_key
+            return func(*args, **kwargs)
+
+        if asyncio.iscoroutinefunction(func):
+            return async_wrapper
+        else:
+            return sync_wrapper
+
+    return decorator
+
+
+def _has_running_loop() -> bool:
+    try:
+        asyncio.get_running_loop()
+        return True
+    except RuntimeError:
+        return False
+
+
+################################################################################
+
+@requires_api_key(provider_name='demo1')
+def get_api_key1(*, api_key: str) -> str:
+    return api_key
+
+
+@requires_api_key(provider_name='demo2')
+async def get_api_key2(*, api_key: str) -> str:
+    return api_key
+
+
+if __name__ == '__main__':
+    print(f'API key: {get_api_key1(api_key="")}')
+    print(f'API key: {asyncio.run(get_api_key2(api_key=""))}')