Chess.com MCP Server

Instructions

Implementation Reference

• src/chess_mcp/server.py:224-237 (handler)

  The main handler function for the 'get_club_members' tool. It is decorated with @mcp.tool for registration and fetches club members data from the Chess.com API endpoint 'club/{url_id}/members' using the shared make_api_request helper.

  @mcp.tool(description="Get members of a club on Chess.com")
  async def get_club_members(url_id: str) -> Dict[str, Any]:
      """
      Get members of a club on Chess.com.
  
      Args:
          url_id: The URL identifier of the club
  
      Returns:
          Club members data
      """
      logger.info("Fetching club members", url_id=url_id)
      return await make_api_request(f"club/{url_id}/members")

• src/chess_mcp/server.py:26-81 (helper)

  Shared helper function used by get_club_members (and other tools) to perform HTTP requests to the Chess.com API.

  async def make_api_request(
      endpoint: str,
      params: Optional[Dict[str, Any]] = None,
      accept_json: bool = True
  ) -> Union[Dict[str, Any], str]:
      """
      Make a request to the Chess.com API.
  
      Args:
          endpoint: The API endpoint to request
          params: Optional query parameters
          accept_json: Whether to accept JSON response (True) or PGN (False)
  
      Returns:
          JSON response as dict or text response as string
  
      Raises:
          httpx.HTTPError: If the request fails
      """
      url = f"{config.base_url}/{endpoint}"
      headers = {
          "accept": "application/json" if accept_json else "application/x-chess-pgn"
      }
  
      logger.debug(
          "Making API request",
          endpoint=endpoint,
          url=url,
          accept_json=accept_json,
          has_params=params is not None
      )
  
      async with httpx.AsyncClient() as client:
          try:
              response = await client.get(url, headers=headers, params=params or {})
              response.raise_for_status()
  
              if accept_json:
                  result = response.json()
                  logger.debug("API request successful", endpoint=endpoint, response_type="json")
                  return result
              else:
                  result = response.text
                  logger.debug("API request successful", endpoint=endpoint, response_type="text")
                  return result
  
          except httpx.HTTPError as e:
              logger.error(
                  "API request failed",
                  endpoint=endpoint,
                  url=url,
                  error=str(e),
                  error_type=type(e).__name__
              )
              raise