diff --git a/belay/__init__.py b/belay/__init__.py
index 05adb55..b4b326b 100644
--- a/belay/__init__.py
+++ b/belay/__init__.py
@@ -3,12 +3,15 @@
 
 __all__ = [
     "AuthenticationError",
-    "minify",
+    "ConnectionLost",
     "Device",
-    "SpecialFunctionNameError",
-    "PyboardException",
-    "Implementation",
     "FeatureUnavailableError",
+    "Implementation",
+    "MaxHistoryLengthError",
+    "PyboardException",
+    "SpecialFunctionNameError",
+    "list_devices",
+    "minify",
 ]
 from ._minify import minify
 from .device import Device, Implementation
@@ -19,4 +22,5 @@
     MaxHistoryLengthError,
     SpecialFunctionNameError,
 )
+from .helpers import list_devices
 from .pyboard import PyboardException
diff --git a/belay/helpers.py b/belay/helpers.py
index d6e2bbc..4bffdb0 100644
--- a/belay/helpers.py
+++ b/belay/helpers.py
@@ -2,6 +2,9 @@
 import secrets
 import string
 from functools import lru_cache, partial, wraps
+from typing import List
+
+from serial.tools import list_ports
 
 from . import snippets
 
@@ -22,3 +25,18 @@ def random_python_identifier(n=16):
 @lru_cache
 def read_snippet(name):
     return pkg_resources.read_text(snippets, f"{name}.py")
+
+
+def list_devices() -> List[str]:
+    """Lists available device ports.
+
+    For example::
+
+        ['/dev/cu.usbmodem1143401', '/dev/cu.usbmodem113101']
+
+    Returns
+    -------
+    list[str]
+        Available devices identifiers.
+    """
+    return [port.device for port in list_ports.comports()]