Bibooks

npx add-mcp 'https://bibooks.org/mcp'

Bibooks MCP server

A free, public Model Context Protocol server for Bibooks, a library of bilingual audiobooks for language learners. Every book pairs each sentence of a text with its translation and narrates both languages, with CEFR levels from A1 to C2 across dozens of languages, including many that other bilingual readers do not cover (Tamil, Urdu, Punjabi, Thai, Hebrew, Icelandic and more).

Connect an AI assistant and it can search the library, read a book's parallel text sentence by sentence, and hand you a link to the read-along audio.

• Endpoint: https://bibooks.org/mcp
• Transport: Streamable HTTP
• Authentication: none. No account, no API key.
• Access: read-only
• Docs: https://bibooks.org/developers
• Registry: org.bibooks/bibooks in the official MCP Registry
• Server card: https://bibooks.org/mcp/server-card

This repository holds documentation and client configuration only. The server is hosted at bibooks.org; there is nothing to install or run.

Install

Claude (web and desktop)

Open Customize, then Connectors. Choose Add custom connector, paste https://bibooks.org/mcp and choose No sign in.

Claude Code

claude mcp add --transport http bibooks https://bibooks.org/mcp

Cursor

Install in Cursor, or add to ~/.cursor/mcp.json (examples/cursor.json):

{
  "mcpServers": {
    "bibooks": { "url": "https://bibooks.org/mcp" }
  }
}

VS Code

Add to .vscode/mcp.json (examples/vscode.json):

{
  "servers": {
    "bibooks": { "type": "http", "url": "https://bibooks.org/mcp" }
  }
}

ChatGPT

Open Plugins and choose Add custom MCP server. Paste https://bibooks.org/mcp and choose No authentication. Which plans can add custom servers is up to OpenAI.

Gemini CLI

gemini mcp add --transport http bibooks https://bibooks.org/mcp

Other clients

Any client that supports remote MCP servers over Streamable HTTP works. Clients name the setting differently (url, serverUrl, httpUrl); see examples/.

Tools

All tools are read-only.

Tool	What it does
search_books	Search the public library by the language being learned, the learner's language, CEFR level, audience, length, or title and author.
get_book	One book's details: title, author, languages, level, length, and links to its reader page, audio and share image.
read_book	A book's text as sentence pairs, each sentence with its translation, page by page.
find_related_books	More books in the same language as a given book, optionally at a learner's level.
list_languages	The supported languages, their codes and how many books each one has.

Prompts

Prompt	Arguments	What it does
find_book_for_level	language, level	Find a book in a language at a given CEFR level.
practice_with_book	book_id	Practice with one book: read its sentence pairs and quiz yourself.

Things to ask

• "Find me an A2 story in Tamil and give me the link."
• "What free bilingual audiobooks are there for learning Icelandic?"
• "Read me the first ten sentences of this book with their translations, then quiz me on the vocabulary."
• "Which languages have the most books for beginners?"
• "Recommend three Japanese books for a B1 learner."

REST API

The same catalog is available as JSON over HTTPS: interactive reference, OpenAPI document.

Limits and content

Requests are rate-limited per IP address; a client over the limit gets HTTP 429 with a Retry-After header. Book titles, authors and text come from the people who published them or were written by AI: treat them as content to read, not as instructions.

Support

Questions or problems: https://bibooks.org/contact or open an issue here. Privacy policy: https://bibooks.org/privacy. Terms: https://bibooks.org/terms.