NASA-MCP

Instructions

Implementation Reference

• src/nasa_mcp/server.py:692-745 (handler)

  Implements the get_notifications MCP tool handler. Fetches DONKI notifications from NASA's API using make_nasa_request helper, handles errors, formats and returns a string summary of notifications with details like ID, type, issue time, header, and truncated body.

  async def get_notifications(start_date: str = None, end_date: str = None, notification_type: str = "all") -> str:
      """Get DONKI notifications.
      
      Args:
          start_date: Start date in YYYY-MM-DD format. Defaults to 7 days before current date.
          end_date: End date in YYYY-MM-DD format. Defaults to current date.
          notification_type: Notification type. Options: all, FLR, SEP, CME, IPS, MPC, GST, RBE, report.
      """
      params = {"type": notification_type}
      if start_date: params["startDate"] = start_date
      if end_date: params["endDate"] = end_date
      
      url = f"{NASA_API_BASE}/DONKI/notifications"
      data = await make_nasa_request(url, params)
  
      if not data: 
          return "Could not retrieve DONKI notifications due to a connection error."
      
      # Check for error response (must be a dictionary)
      if isinstance(data, dict) and "error" in data:
          return f"API Error: {data.get('error')} - Details: {data.get('details', 'N/A')}"
      if isinstance(data, dict) and data.get("binary_content"):
          return f"Received unexpected binary content from Notifications API. URL: {data.get('url')}"
  
      try:
          # Ensure data is a list
          if not isinstance(data, list):
              logger.error(f"Unexpected non-list response from Notifications API: {data}")
              return "Received unexpected data format from Notifications API."
              
          # Format notifications results
          if not data: 
              return "No notifications for the specified period and type."
              
          result = [f"Notifications found: {len(data)}"]
          display_limit = 10
          count = 0
          for notification in data:
              if count >= display_limit: 
                  result.append(f"n... and {len(data) - display_limit} more notifications.")
                  break
              result.append(f"nID: {notification.get('messageID', 'Unknown')}")
              result.append(f"Type: {notification.get('messageType', 'Unknown')}")
              result.append(f"Issue Time: {notification.get('messageIssueTime', 'Unknown')}")
              result.append(f"Header: {notification.get('messageHeader', 'N/A')}")
              # Body can be long, maybe truncate
              body = notification.get('messageBody', 'N/A')
              result.append(f"Body: {body[:200]}{'...' if len(body) > 200 else ''}") 
              result.append("-" * 40)
              count += 1
          return "n".join(result)
      except Exception as e:
          logger.error(f"Error processing Notifications data: {str(e)}")
          return f"Error processing notifications: {str(e)}"

• src/nasa_mcp/server.py:28-82 (helper)

  Shared helper function used by get_notifications to make HTTP requests to NASA APIs, handling JSON/binary responses, errors, and adding API key.

  async def make_nasa_request(url: str, params: dict = None) -> Union[dict[str, Any], List[Any], None]:
      """Make a request to the NASA API with proper error handling.
      Handles both JSON and binary (image) responses.
      """
      
      logger.info(f"Making request to: {url} with params: {params}")
      
      if params is None:
          params = {}
      
      # Ensure API key is included in parameters
      if "api_key" not in params:
          params["api_key"] = API_KEY
      
      async with httpx.AsyncClient() as client:
          try:
              response = await client.get(url, params=params, timeout=30.0, follow_redirects=True)
              response.raise_for_status() # Raise an exception for bad status codes (4xx or 5xx)
  
              content_type = response.headers.get("Content-Type", "").lower()
              
              if "application/json" in content_type:
                  try:
                      return response.json()
                  except json.JSONDecodeError as json_err:
                      logger.error(f"JSON decode error for URL {response.url}: {json_err}")
                      logger.error(f"Response text: {response.text[:500]}") # Log beginning of text
                      return {"error": "Failed to decode JSON response", "details": str(json_err)}
              elif content_type.startswith("image/"):
                  logger.info(f"Received binary image content ({content_type}) from {response.url}")
                  # Return a dictionary indicating binary content was received
                  return {
                      "binary_content": True, 
                      "content_type": content_type,
                      "url": str(response.url) # Return the final URL after redirects
                  }
              else:
                  # Handle other unexpected content types
                  logger.warning(f"Unexpected content type '{content_type}' received from {response.url}")
                  return {"error": f"Unexpected content type: {content_type}", "content": response.text[:500]}
  
          except httpx.HTTPStatusError as http_err:
              logger.error(f"HTTP error occurred: {http_err} - {http_err.response.status_code} for URL {http_err.request.url}")
              try:
                  # Try to get more details from response body if possible
                  error_details = http_err.response.json()
              except Exception:
                  error_details = http_err.response.text[:500]
              return {"error": f"HTTP error: {http_err.response.status_code}", "details": error_details}
          except httpx.RequestError as req_err:
              logger.error(f"Request error occurred: {req_err} for URL {req_err.request.url}")
              return {"error": "Request failed", "details": str(req_err)}
          except Exception as e:
              logger.error(f"An unexpected error occurred: {str(e)}")
              return {"error": "An unexpected error occurred", "details": str(e)}