from mcp.server import MCPServer

mcp = MCPServer("Bookshop")

CATALOG = {

"Dune": "Frank Herbert",

"Neuromancer": "William Gibson",

"The Left Hand of Darkness": "Ursula K. Le Guin",

}

@mcp.tool()

def search_books(query: str) -> list[str]:

"""Search the catalog by title or author."""

needle = query.lower()

return [title for title, author in CATALOG.items() if needle in title.lower() or needle in author.lower()]

@mcp.tool()

def get_author(title: str) -> str:

"""Look up the author of a book in the catalog."""

if title not in CATALOG:

raise ValueError(f"No book titled {title!r} in the catalog.")

return CATALOG[title]

@mcp.resource("catalog://titles")

def titles() -> str:

"""Every title in the catalog, one per line."""

return "\n".join(sorted(CATALOG))

if __name__ == "__main__":

mcp.run()