diff --git a/pm3py/core/client.py b/pm3py/core/client.py
index ba100fa..e57cdb5 100644
--- a/pm3py/core/client.py
+++ b/pm3py/core/client.py
@@ -1,5 +1,6 @@
 """Main Proxmark3 client with nested API."""
 import asyncio
+import functools
 import glob
 import inspect
 import logging
@@ -161,13 +162,20 @@ class _SyncProxy:
         if hasattr(attr, '_t'):
             return _SyncProxy(attr, self._loop)
         if callable(attr) and inspect.iscoroutinefunction(attr):
+            # functools.wraps copies __doc__/__name__ AND sets __wrapped__, so
+            # inspect.signature() and help() report the real params (block, uid=None)
+            # instead of the wrapper's (*args, **kwargs).
+            @functools.wraps(attr)
             def sync_wrapper(*args, **kwargs):
                 return self._loop.run_until_complete(attr(*args, **kwargs))
-            sync_wrapper.__name__ = name
-            sync_wrapper.__doc__ = attr.__doc__
             return sync_wrapper
         return attr
 
+    def __dir__(self):
+        # Surface the wrapped target's command methods and sub-modules so
+        # dir()/REPL tab-completion and help() discovery work through the proxy.
+        return sorted(set(object.__dir__(self)) | set(dir(self._target)))
+
     def close(self):
         """Disconnect and close the event loop."""
         self._loop.run_until_complete(self._target.disconnect())
diff --git a/tests/test_sync_proxy.py b/tests/test_sync_proxy.py
new file mode 100644
index 0000000..d4d7300
--- /dev/null
+++ b/tests/test_sync_proxy.py
@@ -0,0 +1,31 @@
+"""_SyncProxy introspection: dir() and help()/signature must work through the proxy."""
+import asyncio
+import inspect
+from unittest.mock import AsyncMock
+
+from pm3py.core.client import _SyncProxy
+from pm3py.core.hf_iso15 import HF15Commands
+
+
+def _proxy():
+    return _SyncProxy(HF15Commands(AsyncMock()), asyncio.new_event_loop())
+
+
+def test_dir_surfaces_target_methods():
+    d = dir(_proxy())
+    for name in ("scan", "rdbl", "wrbl", "raw_inventory", "sniff"):
+        assert name in d, f"{name} missing from dir(proxy)"
+
+
+def test_wrapped_method_preserves_signature():
+    proxy = _proxy()
+    # signature must be the real params, not the wrapper's (*args, **kwargs)
+    sig = inspect.signature(proxy.rdbl)
+    assert list(sig.parameters) == ["block", "uid"]
+    assert sig.parameters["uid"].default is None
+
+
+def test_wrapped_method_preserves_doc_and_name():
+    proxy = _proxy()
+    assert proxy.rdbl.__name__ == "rdbl"
+    assert proxy.rdbl.__doc__ == "Read a single block."