Context Book

Stop re-explaining yourself to Agents.

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What it can do

  • Book Create Or Update: Create a new Book or update an existing one. All fields (title, source, tags) are required. If book_id is omitted a new book is created and the new book_id is returned. If book_
  • Book Get: Retrieve all pages of a Book in order by its book_id.
  • Book List: List available Books. Returns metadata including book_id, title, and tags.

What data it sees

Do you need an account

No: the server works without sign-in

Stop re-explaining yourself to Agents. Give it the right context, right when it needs it.

LLMs are stateless — each conversation starts from scratch. ContextBook gives your AI tools a persistent, searchable knowledge library to draw the right context when they need it. No bloatware, no pre-loaded junk. Just the right information, at the right time.

How to connect

How to connect Context Book to Claude

The server address to paste into Claude settings:

https://context-book.run.tools

  1. Open Claude (claude.ai or the desktop app).
  2. Go to Settings → Connectors.
  3. Click Add custom connector.
  4. Paste the server address copied below into Remote MCP server URL and click Add.
  5. In a chat, click + → Connectors and switch the new connector on.

Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.

Authorization

After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.

How to connect Context Book to ChatGPT

The server address to paste into ChatGPT settings:

https://context-book.run.tools

  1. Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
  2. Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
  3. Open Settings → Connectors and click Create.
  4. Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
  5. Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
  6. In a new chat open + → Apps/Connectors and enable the connector.

OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.

Authorization

On first use ChatGPT opens the service's sign-in window. Sign in and approve access.

How to connect Context Book to Cursor

The server address to paste into Cursor settings:

https://context-book.run.tools

Fastest: click Open in Cursor below and confirm the prompt.

Manually:

  1. In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
  2. Paste the JSON copied below into ~/.cursor/mcp.json (per project: .cursor/mcp.json in the repo root).
  3. Save the file. The server appears in the MCP list; authorize it there if asked.

Authorization

If the service needs sign-in, an authorize button appears next to the server in the MCP list.

Server tool list (8)

Raw names from tools/list. Only developers need these.

book_create_or_updateCreate a new Book or update an existing one. All fields (title, source, tags) are required. If book_id is omitted a new book is created and the new book_id is returned. If book_id is provided and exists, its metadata is replaced atomically. If book_id is provided but not found, a new book is created and a note is included in the response. Store the returned book_id in memory for future page operations.
book_getRetrieve all pages of a Book in order by its book_id.
book_listList available Books. Returns metadata including book_id, title, and tags.
page_deletePermanently remove a page from a Book using its book_id and page_index. Note: Page indices will not be re-indexed after deletion (gaps are normal).
page_insertInsert a page of text (≤1000 words) into a Book. Each page is an atomic, semantically meaningful chunk. Maintains retrieval quality via meaningful splitting and overlap.
page_searchPerform semantic search across all Books using a natural language query. Returns matching pages with their book_id and page_index.
page_updateUpdate a specific page within a Book using its book_id and page_index. Max content size: 1000 words.
readmeReturns the ContextBook usage guide. Call this once at the start of a session if you have not already loaded the instructions.