X (Twitter) MCP server

Instructions

Implementation Reference

• src/x_twitter_mcp/server.py:127-141 (handler)

  The handler function for the 'get_user_followers' tool. It checks rate limits, initializes the Twitter client, fetches the followers using Tweepy's get_users_followers method, and returns a list of user dictionaries.

  @server.tool(name="get_user_followers", description="Retrieves a list of followers for a given user")
  async def get_user_followers(user_id: str, count: Optional[int] = 100, cursor: Optional[str] = None) -> List[Dict]:
      """Retrieves a list of followers for a given user.
  
      Args:
          user_id (str): The user ID whose followers are to be retrieved.
          count (Optional[int]): The number of followers to retrieve per page. Default is 100. Max is 100 for V2 API.
          cursor (Optional[str]): A pagination token for fetching the next set of results.
      """
      if not check_rate_limit("follow_actions"):
          raise Exception("Follow action rate limit exceeded")
      client, _ = initialize_twitter_clients()
      followers = client.get_users_followers(id=user_id, max_results=count, pagination_token=cursor, user_fields=["id", "name", "username"])
      return [user.data for user in followers.data]

• src/x_twitter_mcp/server.py:127-127 (registration)

  The @server.tool decorator registers the get_user_followers function as an MCP tool with the specified name and description.

  @server.tool(name="get_user_followers", description="Retrieves a list of followers for a given user")

• src/x_twitter_mcp/server.py:128-135 (schema)

  The function signature and docstring define the input schema (parameters: user_id (str), count (Optional[int]=100), cursor (Optional[str]=None)) and output (List[Dict]).

  async def get_user_followers(user_id: str, count: Optional[int] = 100, cursor: Optional[str] = None) -> List[Dict]:
      """Retrieves a list of followers for a given user.
  
      Args:
          user_id (str): The user ID whose followers are to be retrieved.
          count (Optional[int]): The number of followers to retrieve per page. Default is 100. Max is 100 for V2 API.
          cursor (Optional[str]): A pagination token for fetching the next set of results.
      """

• src/x_twitter_mcp/server.py:28-66 (helper)

  Helper function to lazily initialize the Tweepy Twitter v2 Client and v1.1 API.

  def initialize_twitter_clients() -> tuple[tweepy.Client, tweepy.API]:
      """Initialize Twitter API clients on-demand."""
      global _twitter_client, _twitter_v1_api
  
      if _twitter_client is not None and _twitter_v1_api is not None:
          return _twitter_client, _twitter_v1_api
  
      # Verify required environment variables
      required_env_vars = [
          "TWITTER_API_KEY",
          "TWITTER_API_SECRET",
          "TWITTER_ACCESS_TOKEN",
          "TWITTER_ACCESS_TOKEN_SECRET",
          "TWITTER_BEARER_TOKEN",
      ]
      for var in required_env_vars:
          if not os.getenv(var):
              raise EnvironmentError(f"Missing required environment variable: {var}")
  
      # Initialize v2 API client
      _twitter_client = tweepy.Client(
          consumer_key=os.getenv("TWITTER_API_KEY"),
          consumer_secret=os.getenv("TWITTER_API_SECRET"),
          access_token=os.getenv("TWITTER_ACCESS_TOKEN"),
          access_token_secret=os.getenv("TWITTER_ACCESS_TOKEN_SECRET"),
          bearer_token=os.getenv("TWITTER_BEARER_TOKEN")
      )
  
      # Initialize v1.1 API for media uploads and other unsupported v2 endpoints
      auth = tweepy.OAuth1UserHandler(
          consumer_key=os.getenv("TWITTER_API_KEY"),
          consumer_secret=os.getenv("TWITTER_API_SECRET"),
          access_token=os.getenv("TWITTER_ACCESS_TOKEN"),
          access_token_secret=os.getenv("TWITTER_ACCESS_TOKEN_SECRET")
      )
      _twitter_v1_api = tweepy.API(auth)
  
      return _twitter_client, _twitter_v1_api

• src/x_twitter_mcp/server.py:78-92 (helper)

  Helper function to check rate limits before performing actions like fetching followers.

  def check_rate_limit(action_type: str) -> bool:
      """Check if the action is within rate limits."""
      config = RATE_LIMITS.get(action_type)
      if not config:
          return True  # No limit defined
      counter = rate_limit_counters[action_type]
      now = datetime.now()
      if now >= counter["reset_time"]:
          counter["count"] = 0
          counter["reset_time"] = now + config["window"]
      if counter["count"] >= config["limit"]:
          return False
      counter["count"] += 1
      return True