diff --git a/src/pipecat/services/openrouter/llm.py b/src/pipecat/services/openrouter/llm.py
index 431724f94..85d1662fe 100644
--- a/src/pipecat/services/openrouter/llm.py
+++ b/src/pipecat/services/openrouter/llm.py
@@ -4,6 +4,12 @@
 # SPDX-License-Identifier: BSD 2-Clause License
 #
 
+"""OpenRouter LLM service implementation.
+
+This module provides an OpenAI-compatible interface for interacting with OpenRouter's API,
+extending the base OpenAI LLM service functionality.
+"""
+
 from typing import Optional
 
 from loguru import logger
@@ -18,10 +24,11 @@ class OpenRouterLLMService(OpenAILLMService):
     maintaining full compatibility with OpenAI's interface and functionality.
 
     Args:
-        api_key (str): The API key for accessing OpenRouter's API
-        base_url (str, optional): The base URL for OpenRouter API. Defaults to "https://openrouter.ai/api/v1"
-        model (str, optional): The model identifier to use. Defaults to "openai/gpt-4o-2024-11-20"
-        **kwargs: Additional keyword arguments passed to OpenAILLMService
+        api_key: The API key for accessing OpenRouter's API. If None, will attempt
+            to read from environment variables.
+        model: The model identifier to use. Defaults to "openai/gpt-4o-2024-11-20".
+        base_url: The base URL for OpenRouter API. Defaults to "https://openrouter.ai/api/v1".
+        **kwargs: Additional keyword arguments passed to OpenAILLMService.
     """
 
     def __init__(
@@ -40,5 +47,15 @@ class OpenRouterLLMService(OpenAILLMService):
         )
 
     def create_client(self, api_key=None, base_url=None, **kwargs):
+        """Create an OpenRouter API client.
+
+        Args:
+            api_key: The API key to use for authentication. If None, uses instance default.
+            base_url: The base URL for the API. If None, uses instance default.
+            **kwargs: Additional arguments passed to the parent client creation method.
+
+        Returns:
+            The configured OpenRouter API client instance.
+        """
         logger.debug(f"Creating OpenRouter client with api {base_url}")
         return super().create_client(api_key, base_url, **kwargs)