Financial Datasets MCP Server

Instructions

Implementation Reference

• server.py:245-272 (handler)

  The handler function decorated with @mcp.tool() for the get_crypto_prices MCP tool. It fetches historical cryptocurrency prices from the Financial Datasets API based on ticker, date range, and interval parameters, handles errors, and returns the prices as a formatted JSON string.

  @mcp.tool()
  async def get_crypto_prices(
      ticker: str,
      start_date: str,
      end_date: str,
      interval: str = "day",
      interval_multiplier: int = 1,
  ) -> str:
      """
      Gets historical prices for a crypto currency.
      """
      # Fetch data from the API
      url = f"{FINANCIAL_DATASETS_API_BASE}/crypto/prices/?ticker={ticker}&interval={interval}&interval_multiplier={interval_multiplier}&start_date={start_date}&end_date={end_date}"
      data = await make_request(url)
  
      # Check if data is found
      if not data:
          return "Unable to fetch prices or no prices found."
  
      # Extract the prices
      prices = data.get("prices", [])
  
      # Check if prices are found
      if not prices:
          return "Unable to fetch prices or no prices found."
  
      # Stringify the prices
      return json.dumps(prices, indent=2)

• server.py:25-41 (helper)

  Helper function used by the get_crypto_prices tool to make authenticated HTTP GET requests to the Financial Datasets API, loading API key from environment, handling timeouts and errors.

  async def make_request(url: str) -> dict[str, any] | None:
      """Make a request to the Financial Datasets API with proper error handling."""
      # Load environment variables from .env file
      load_dotenv()
      
      headers = {}
      if api_key := os.environ.get("FINANCIAL_DATASETS_API_KEY"):
          headers["X-API-KEY"] = api_key
  
      async with httpx.AsyncClient() as client:
          try:
              response = await client.get(url, headers=headers, timeout=30.0)
              response.raise_for_status()
              return response.json()
          except Exception as e:
              return {"Error": str(e)}

• server.py:21-21 (helper)

  Constant defining the base URL for the Financial Datasets API, used in constructing endpoints for crypto prices.

  FINANCIAL_DATASETS_API_BASE = "https://api.financialdatasets.ai"