diff --git a/pythonik/client.py b/pythonik/client.py
index d76989c..16b7af1 100644
--- a/pythonik/client.py
+++ b/pythonik/client.py
@@ -1,26 +1,44 @@
-from urllib3.util import Retry
 from requests import Session
 from requests.adapters import HTTPAdapter
+from urllib3.util import Retry
 
 from pythonik.specs.assets import AssetSpec
+from pythonik.specs.collection import CollectionSpec
 from pythonik.specs.files import FilesSpec
 from pythonik.specs.jobs import JobSpec
 from pythonik.specs.metadata import MetadataSpec
 from pythonik.specs.search import SearchSpec
-from pythonik.specs.collection import CollectionSpec
 
 
-# Iconik APIs
 class PythonikClient:
     """
-    Iconik Client
+    Iconik Client providing access to all API endpoints.
+
+    This client provides both implemented and placeholder methods for
+    various Iconik API endpoints. Placeholder methods will raise
+    NotImplementedError until the corresponding specs are implemented.
     """
 
-    def __init__(self, app_id: str, auth_token: str, timeout: int, base_url: str  = "https://app.iconik.io" ):
+    def __init__(
+        self,
+        app_id: str,
+        auth_token: str,
+        timeout: int,
+        base_url: str = "https://app.iconik.io",
+    ):
+        """
+        Initialize the Pythonik client.
+
+        Args:
+            app_id: Application ID for Iconik API
+            auth_token: Authentication token
+            timeout: Request timeout in seconds
+            base_url: Base URL for Iconik instance
+        """
         self.session = Session()
         self.base_url = base_url
         retry_strategy = Retry(
-            total=4,  # Maximum number of retries
+            total=4,
             backoff_factor=3,
         )
         http_adapter = HTTPAdapter(max_retries=retry_strategy)
@@ -33,20 +51,136 @@ def __init__(self, app_id: str, auth_token: str, timeout: int, base_url: str  =
         }
         self.timeout = timeout
 
+    # Implemented endpoints
     def collections(self):
+        """Access collections API endpoints."""
         return CollectionSpec(self.session, self.timeout, self.base_url)
 
     def assets(self):
+        """Access assets API endpoints."""
         return AssetSpec(self.session, self.timeout, self.base_url)
 
     def files(self):
+        """Access files API endpoints."""
         return FilesSpec(self.session, self.timeout, self.base_url)
 
     def metadata(self):
+        """Access metadata API endpoints."""
         return MetadataSpec(self.session, self.timeout, self.base_url)
 
     def search(self):
+        """Access search API endpoints."""
         return SearchSpec(self.session, self.timeout, self.base_url)
 
     def jobs(self):
+        """Access jobs API endpoints."""
         return JobSpec(self.session, self.timeout, self.base_url)
+
+    def acls(self):
+        """
+        Access ACLs (Access Control Lists) API endpoints.
+
+        Raises:
+            NotImplementedError: ACLs endpoint not yet implemented
+        """
+        raise NotImplementedError(
+            "ACLs endpoint is not yet implemented. "
+            "Please check the documentation for updates or contribute "
+            "to the pythonik project.")
+
+    def auth(self):
+        """
+        Access authentication API endpoints.
+
+        Raises:
+            NotImplementedError: Auth endpoint not yet implemented
+        """
+        raise NotImplementedError(
+            "Authentication endpoint is not yet implemented. "
+            "Please check the documentation for updates or contribute "
+            "to the pythonik project.")
+
+    def automations(self):
+        """
+        Access automations API endpoints.
+
+        Raises:
+            NotImplementedError: Automations endpoint not yet implemented
+        """
+        raise NotImplementedError(
+            "Automations endpoint is not yet implemented. "
+            "Please check the documentation for updates or contribute "
+            "to the pythonik project.")
+
+    def notifications(self):
+        """
+        Access notifications API endpoints.
+
+        Raises:
+            NotImplementedError: Notifications endpoint not yet implemented
+        """
+        raise NotImplementedError(
+            "Notifications endpoint is not yet implemented. "
+            "Please check the documentation for updates or contribute "
+            "to the pythonik project.")
+
+    def settings(self):
+        """
+        Access settings API endpoints.
+
+        Raises:
+            NotImplementedError: Settings endpoint not yet implemented
+        """
+        raise NotImplementedError(
+            "Settings endpoint is not yet implemented. "
+            "Please check the documentation for updates or contribute "
+            "to the pythonik project.")
+
+    def stats(self):
+        """
+        Access statistics API endpoints.
+
+        Raises:
+            NotImplementedError: Stats endpoint not yet implemented
+        """
+        raise NotImplementedError(
+            "Statistics endpoint is not yet implemented. "
+            "Please check the documentation for updates or contribute "
+            "to the pythonik project.")
+
+    def transcode(self):
+        """
+        Access transcoding API endpoints.
+
+        Raises:
+            NotImplementedError: Transcode endpoint not yet implemented
+        """
+        raise NotImplementedError(
+            "Transcoding endpoint is not yet implemented. "
+            "Please check the documentation for updates or contribute "
+            "to the pythonik project.")
+
+    def users(self):
+        """
+        Access users API endpoints.
+
+        Raises:
+            NotImplementedError: Users endpoint not yet implemented
+        """
+        raise NotImplementedError(
+            "Users endpoint is not yet implemented. "
+            "Please check the documentation for updates or contribute "
+            "to the pythonik project.")
+
+    def users_notifications(self):
+        """
+        Access user notifications API endpoints.
+
+        Raises:
+            NotImplementedError: User notifications endpoint not yet
+                implemented
+        """
+        raise NotImplementedError(
+            "User notifications endpoint is not yet implemented. "
+            "Please check the documentation for updates or contribute "
+            "to the pythonik project.")