MCP Open Library

A Model Context Protocol (MCP) server for the Open Library API that enables AI assistants to search for book and author information.

Overview

This project implements an MCP server that provides tools for AI assistants to interact with the Open Library. It allows searching for book information by title, searching for authors by name, retrieving detailed author information using their Open Library key, and getting URLs for author photos using their Open Library ID (OLID). The server returns structured data for book and author information.

Features

Book Search by Title: Search for books using their title (get_book_by_title).
Author Search by Name: Search for authors using their name (get_authors_by_name).
Get Author Details: Retrieve detailed information for a specific author using their Open Library key (get_author_info).
Get Author Photo: Get the URL for an author's photo using their Open Library ID (OLID) (get_author_photo).
Get Book Cover: Get the URL for a book's cover image using various identifiers (ISBN, OCLC, LCCN, OLID, ID) (get_book_cover).
Get Book by ID: Retrieve detailed book information using various identifiers (ISBN, LCCN, OCLC, OLID) (get_book_by_id).

Installation

Installing via Smithery

To install MCP Open Library for Claude Desktop automatically via Smithery:

npx -y @smithery/cli install @8enSmith/mcp-open-library --client claude

Manual Installation

# Clone the repository
git clone https://github.com/8enSmith/mcp-open-library.git
cd mcp-open-library

# Install dependencies
npm install

# Build the project
npm run build

Usage

Running the Server

Ensure you are running node v22.21.1 (it'll probably work on a newer version of node but this is what Im using for this test). If you have nvm installed run nvm use.
In the mcp-open-library root directory run npm run build
Next run npm run inspector. Once built, click the URL with the MCP_PROXY_AUTH_TOKEN query string parameter to open the Inspector.
In the Inspector, choose 'STDIO' transport
Make sure the command is set to 'build/index.js'
Click the 'Connect' button in the Inspector - you'll now connect to the server
Click 'Tools' in the top right menu bar
Try running a tool e.g. click get_book_by_title
Search for a book e.g. In the title box enter 'The Hobbit' and then click 'Run Tool'. Server will then return book details.

Using with an MCP Client

This server implements the Model Context Protocol, which means it can be used by any MCP-compatible AI assistant or client e.g. Claude Desktop. The server exposes the following tools:

get_book_by_title: Search for book information by title
get_authors_by_name: Search for author information by name
get_author_info: Get detailed information for a specific author using their Open Library Author Key
get_author_photo: Get the URL for an author's photo using their Open Library Author ID (OLID)
get_book_cover: Get the URL for a book's cover image using a specific identifier (ISBN, OCLC, LCCN, OLID, or ID)
get_book_by_id: Get detailed book information using a specific identifier (ISBN, LCCN, OCLC, or OLID)

Example get_book_by_title input:

{
  "title": "The Hobbit"
}

Example get_book_by_title output:

[
  {
    "title": "The Hobbit",
    "authors": [
      "J. R. R. Tolkien"
    ],
    "first_publish_year": 1937,
    "open_library_work_key": "/works/OL45883W",
    "edition_count": 120,
    "cover_url": "https://covers.openlibrary.org/b/id/10581294-M.jpg"
  }
]

Example get_authors_by_name input:

{
  "name": "J.R.R. Tolkien"
}

Example get_authors_by_name output:

[
  {
    "key": "OL26320A",
    "name": "J. R. R. Tolkien",
    "alternate_names": [
      "John Ronald Reuel Tolkien"
    ],
    "birth_date": "3 January 1892",
    "top_work": "The Hobbit",
    "work_count": 648
  }
]

Example get_author_info input:

{
  "author_key": "OL26320A"
}

Example get_author_info output:

{
  "name": "J. R. R. Tolkien",
  "personal_name": "John Ronald Reuel Tolkien",
  "birth_date": "3 January 1892",
  "death_date": "2 September 1973",
  "bio": "John Ronald Reuel Tolkien (1892-1973) was a major scholar of the English language, specializing in Old and Middle English. He served as the Rawlinson and Bosworth Professor of Anglo-Saxon and later the Merton Professor of English Language and Literature at Oxford University.",
  "alternate_names": ["John Ronald Reuel Tolkien"],
  "photos": [6791763],
  "key": "/authors/OL26320A",
  "remote_ids": {
    "viaf": "95218067",
    "wikidata": "Q892"
  },
  "revision": 43,
  "last_modified": {
    "type": "/type/datetime",
    "value": "2023-02-12T05:50:22.881"
  }
}

Example get_author_photo input:

{
  "olid": "OL26320A"
}

Example get_author_photo output:

https://covers.openlibrary.org/a/olid/OL26320A-L.jpg

Example get_book_cover input:

{
  "key": "ISBN",
  "value": "9780547928227",
  "size": "L"
}

Example get_book_cover output:

https://covers.openlibrary.org/b/isbn/9780547928227-L.jpg

The get_book_cover tool accepts the following parameters:

key: The type of identifier (one of: ISBN, OCLC, LCCN, OLID, or ID)
value: The value of the identifier
size: Optional cover size (S for small, M for medium, L for large, defaults to L)

Example get_book_by_id input:

{
  "idType": "isbn",
  "idValue": "9780547928227"
}

Example get_book_by_id output:

{
  "title": "The Hobbit",
  "authors": [
    "J. R. R. Tolkien"
  ],
  "publishers": [
    "Houghton Mifflin Harcourt"
  ],
  "publish_date": "October 21, 2012",
  "number_of_pages": 300,
  "isbn_13": [
    "9780547928227"
  ],
  "isbn_10": [
    "054792822X"
  ],
  "oclc": [
    "794607877"
  ],
  "olid": [
    "OL25380781M"
  ],
  "open_library_edition_key": "/books/OL25380781M",
  "open_library_work_key": "/works/OL45883W",
  "cover_url": "https://covers.openlibrary.org/b/id/8231496-M.jpg",
  "info_url": "https://openlibrary.org/books/OL25380781M/The_Hobbit",
  "preview_url": "https://archive.org/details/hobbit00tolkien"
}

The get_book_by_id tool accepts the following parameters:

idType: The type of identifier (one of: isbn, lccn, oclc, olid)
idValue: The value of the identifier

An example of this tool being used in Claude Desktop can be see here:

Docker

You can test this MCP server using Docker. To do this first run:

docker build -t mcp-open-library .
docker run -p 8080:8080 mcp-open-library

You can then test the server running within Docker via the inspector e.g.

npm run inspector http://localhost:8080

Development

Project Structure

src/index.ts - Main server implementation
src/types.ts - TypeScript type definitions
src/index.test.ts - Test suite

Available Scripts

npm run build - Build the TypeScript code
npm run watch - Watch for changes and rebuild
npm test - Run the test suite
npm run format - Format code with Prettier
npm run inspector - Run the MCP Inspector against the server

Running Tests

npm test

Contributing

Contributions are welcome! Please feel free to submit a pull request.

Acknowledgments