Bing Search MCP Server

Instructions

Args:
    query: News search query (required)
    count: Number of results (1-50, default 10)
    market: Market code like en-US, en-GB, etc.
    freshness: Time period of news (Day, Week, Month)

Implementation Reference

• mcp_server_bing/server.py:162-236 (handler)

  The primary handler for the 'bing_news_search' tool. Decorated with @server.tool() for registration in FastMCP. Implements the core logic: API key check, rate limiting, HTTP request to Bing News Search endpoint, parses JSON response, formats results with title, URL, description, date, and provider.

  @server.tool()
  async def bing_news_search(
      query: str, count: int = 10, market: str = "en-US", freshness: str = "Day"
  ) -> str:
      """Searches for news articles using Bing News Search API for current
      events and timely information.
  
      Args:
          query: News search query (required)
          count: Number of results (1-50, default 10)
          market: Market code like en-US, en-GB, etc.
          freshness: Time period of news (Day, Week, Month)
      """
      # Get API key from environment
      api_key = os.environ.get("BING_API_KEY", "")
  
      if not api_key:
          return (
              "Error: Bing API key is not configured. Please set the "
              "BING_API_KEY environment variable."
          )
  
      try:
          check_rate_limit()
  
          # News search has a different endpoint
          news_url = f"{BING_API_URL}v7.0/news/search"
  
          headers = {
              "User-Agent": USER_AGENT,
              "Ocp-Apim-Subscription-Key": api_key,
              "Accept": "application/json",
          }
  
          params = {
              "q": query,
              "count": min(count, 50),
              "mkt": market,
              "freshness": freshness,
          }
  
          async with httpx.AsyncClient() as client:
              response = await client.get(
                  news_url, headers=headers, params=params, timeout=10.0
              )
  
              response.raise_for_status()
              data = response.json()
  
              if "value" not in data:
                  return "No news results found."
  
              results = []
              for result in data["value"]:
                  published_date = result.get("datePublished", "Unknown date")
                  provider_info = result.get("provider", [{"name": "Unknown"}])
                  # Handle potential empty provider list
                  provider_name = (
                      provider_info[0]["name"] if provider_info else "Unknown"
                  )
                  results.append(
                      f"Title: {result['name']}\n"
                      f"URL: {result['url']}\n"
                      f"Description: {result['description']}\n"
                      f"Published: {published_date}\n"
                      f"Provider: {provider_name}"
                  )
  
              return "\n\n".join(results)
  
      except httpx.HTTPError as e:
          return f"Error communicating with Bing API: {str(e)}"
      except Exception as e:
          return f"Unexpected error: {str(e)}"

• mcp_server_bing/server.py:163-174 (schema)

  Input schema and documentation for bing_news_search tool, defining parameters query (str required), count (int default 10, 1-50), market (str default en-US), freshness (str default Day), returning formatted string of news results.

  async def bing_news_search(
      query: str, count: int = 10, market: str = "en-US", freshness: str = "Day"
  ) -> str:
      """Searches for news articles using Bing News Search API for current
      events and timely information.
  
      Args:
          query: News search query (required)
          count: Number of results (1-50, default 10)
          market: Market code like en-US, en-GB, etc.
          freshness: Time period of news (Day, Week, Month)
      """

• mcp_server_bing/server.py:77-92 (helper)

  Shared helper function check_rate_limit() used by bing_news_search (and other tools) to enforce rate limits (1/sec, 15k/month). Called before API requests.

  def check_rate_limit():
      """Check if we're within rate limits"""
      now = time.time()
      if now - request_count["last_reset"] > 1:
          request_count["second"] = 0
          request_count["last_reset"] = now
  
      if (
          request_count["second"] >= RATE_LIMIT["per_second"]
          or request_count["month"] >= RATE_LIMIT["per_month"]
      ):
          raise Exception("Rate limit exceeded")
  
      request_count["second"] += 1
      request_count["month"] += 1

• mcp_server_bing/server.py:162-162 (registration)

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

  @server.tool()