Tavily Web Search MCP Server

Instructions

Implementation Reference

• server.py:16-20 (handler)

  The web_search tool handler implementation. It is registered using the @mcp.tool() decorator from FastMCP, takes a query string, uses a TavilyClient instance to fetch search context, and returns the results as a string. The function signature and docstring define the implicit schema.

  @mcp.tool()
  def web_search(query: str) -> str:
      """Search the web for information about the given query"""
      search_results = client.get_search_context(query=query)
      return search_results

• server.py:12-12 (helper)

  Initialization of the TavilyClient instance referenced in the web_search handler for performing web searches.

  client = TavilyClient(os.getenv("TAVILY_API_KEY"))

• server.py:3-3 (helper)

  Import of TavilyClient library used by the web_search tool.

  from tavily import TavilyClient