dex-metrics-mcp

Instructions

Retrieve weekly trading volume by blockchain.

Args:
    limit (int, optional): Maximum number of rows to retrieve from the query. Defaults to 1000.

Returns:
    str: A markdown-formatted pivot table of trading volume data, or an error message if the query fails.

Implementation Reference

• main.py:85-104 (handler)

  The handler function for the 'get_weekly_trading_volume_by_chain' tool, registered via @mcp.tool() decorator. It fetches data from Dune Analytics query ID 2180075, processes it into a pivot table (date by blockchain, usd_volume), sorts by date descending, and returns a markdown table. Includes input validation via type hints and docstring, error handling.

  @mcp.tool()
  def get_weekly_trading_volume_by_chain(limit: int = 1000) -> str:
      """
      Retrieve weekly trading volume by blockchain.
  
      Args:
          limit (int, optional): Maximum number of rows to retrieve from the query. Defaults to 1000.
  
      Returns:
          str: A markdown-formatted pivot table of trading volume data, or an error message if the query fails.
      """
      try:
          data = get_latest_result(2180075, limit=limit)
          df = pd.DataFrame(data)
          df["date"] = pd.to_datetime(df["_col1"]).dt.date
          pivot_df = df.pivot(index="date", columns="blockchain", values="usd_volume")
          pivot_df = pivot_df.sort_index(ascending=False)
          return pivot_df.to_markdown()
      except Exception as e:
          return str(e)  

• main.py:21-43 (helper)

  Supporting helper function used by the tool to retrieve latest execution results from a specified Dune Analytics query via the Dune API, handling HTTP requests and parsing JSON response.

  def get_latest_result(query_id: int, limit: int = 1000) -> list:
      """
      Fetch the latest results from a Dune Analytics query.
  
      Args:
          query_id (int): The ID of the Dune query to fetch results from.
          limit (int, optional): Maximum number of rows to return. Defaults to 1000.
  
      Returns:
          list: A list of dictionaries containing the query results, or an empty list if the request fails.
  
      Raises:
          httpx.HTTPStatusError: If the API request fails due to a client or server error.
      """
      url = f"{BASE_URL}/query/{query_id}/results"
      params = {"limit": limit}
      with httpx.Client() as client:
          response = client.get(url, params=params, headers=HEADERS, timeout=300)
          response.raise_for_status()
          data = response.json()
          
      result_data = data.get("result", {}).get("rows", [])
      return result_data

• main.py:85-85 (registration)

  The @mcp.tool() decorator registers the get_weekly_trading_volume_by_chain function as an MCP tool in the FastMCP server.

  @mcp.tool()