Chrome Extension · Free to start

You save great stuff.
Then you never find it again.

BookmarkOS captures your X and Reddit bookmarks and saves LinkedIn posts from your feed. Summarises everything with AI. Search and chat across your entire collection.

Add to Chrome See how it works

The problem

Three platforms. Zero search.

You keep saving posts because they're valuable. But every platform makes it impossible to find them later.

X / Twitter

Bookmark search is broken

Basic keyword matching. No semantic search. Hundreds of bookmarks with no way to filter or find what you need.

Reddit

Saved posts are a black hole

There is literally no search for saved posts. You have to scroll through everything manually. Good luck finding that comment from 6 months ago.

LinkedIn

Good posts disappear forever

There's no easy way to bookmark LinkedIn posts as you scroll. By the time something valuable resurfaces, you've forgotten it existed.

How it works

Three steps. All automatic.

1

Install it. Visit your bookmarks. Done.

Add the Chrome extension. Open your bookmarks on X or Reddit and BookmarkOS captures everything automatically. On LinkedIn, a save button appears on every post so you can bookmark anything in one click. No importing, no API keys, no setup.

2

AI reads everything so you don't have to

Every bookmark gets a plain-English summary, topic tags, and an embedding. They're automatically grouped into topics so you can see patterns in what you save.

3

Ask anything. Get cited answers.

Search across all your bookmarks at once with AI-powered semantic search — free for everyone. Pro users can go further: ask a natural language question and BookmarkOS writes a cited answer pulled directly from your saved posts.

MCP Integration

Your bookmarks, inside any AI agent

MCP (Model Context Protocol) is the open standard that lets AI agents access external tools. BookmarkOS Pro gives you a personal MCP endpoint. One line of config and your AI can query your entire bookmark collection as live context.

⚡

Live context, not a static export

Your AI pulls from your bookmarks in real time during the conversation. Nothing to paste. Nothing to upload. It just knows.

🔗

Works with any MCP-compatible agent

Claude Desktop, Claude Code, Cursor, Windsurf — if it speaks MCP, BookmarkOS works with it. Your knowledge layer, everywhere you build.

🧠

More powerful than our own chat

Our built-in AI chat is great. But your existing agents already understand your codebase, your files, your context. Bookmarks make them sharper still.

One line to connect

Your entire bookmark collection as an AI context layer

Add your personal MCP endpoint to any compatible AI client. Ask "what did I save about rate limiting?" mid-conversation and get an answer — with a link back to the original post. No switching tabs. No digging through folders.

Claude Code Claude Desktop Cursor Windsurf Any MCP-compatible client
💡

Pro tip: your bookmarks are summaries of things you found important. That's exactly what an AI agent needs to understand how you think.

// Claude Code: .mcp.json or ~/.claude/mcp.json
// Cursor: .cursor/mcp.json
// Windsurf + other HTTP clients: same format

{
  "mcpServers": {
    "bookmarkos": {
      "url": "https://api.bookmarkos.app/mcp/YOUR_TOKEN"
    }
  }
}

Positioning

What BookmarkOS is and isn't

What it is

A search engine for everything you've saved across X, Reddit, and LinkedIn
An AI that only knows what you've personally bookmarked
A Chrome extension that works quietly in the background
Local-first. Your data stays in your browser by default.

What it isn't

Not a read-it-later app. It doesn't store full articles.
Not a general chatbot. It only knows your bookmarks.
Not a Twitter client or social media tool.
Not a note-taking app. It complements the tools you already use.

Pricing

Free to start. Pro when you're ready.

Free
£0
Up to 150 bookmarks
  • X & Reddit capture, LinkedIn save button
  • AI summaries & tags
  • Topic clustering
  • Keyword search
  • Chat with citations
  • Cloud sync
  • MCP endpoint
Pro
£9 /month
Unlimited bookmarks
  • Everything in Free
  • Unlimited bookmarks
  • RAG-powered chat with citations
  • Encrypted cloud sync
  • Personal MCP endpoint
  • Priority processing
Get Pro

FAQ

Common questions

It's a Chrome extension that runs locally in your browser. For X, it intercepts the bookmarks API when you visit your bookmarks page. For Reddit, it reads your saved posts. For LinkedIn, it adds a save button to feed posts. No passwords or API keys needed.

All bookmark data stays in your browser by default (IndexedDB). The only thing sent to our servers is text content for AI processing (summaries and embeddings). Pro users can optionally turn on encrypted cloud sync.

X (Twitter) and Reddit bookmarks are captured automatically. For LinkedIn, BookmarkOS adds a save button to posts in your feed. All three platforms are searched together in one place. Works with Chrome, Brave, Arc, Edge, and any Chromium-based browser.

Twitter's search is basic keyword matching on one platform. BookmarkOS gives you semantic AI search across X, Reddit, and LinkedIn at once. Ask natural language questions and get cited answers from your entire collection.

MCP (Model Context Protocol) is an open standard that lets AI agents access external data as live context. BookmarkOS Pro gives you a personal MCP endpoint. Add it to Claude Desktop, Claude Code, Cursor, Windsurf, or any MCP-compatible client — your AI can then search your entire bookmark collection mid-conversation, without you having to copy or paste anything.

Yes. Free includes 150 bookmarks with AI summaries, tags, topic clustering, and keyword search. Pro is £9/month for unlimited bookmarks, chat, cloud sync, and MCP.

Stop saving. Start using.

150 bookmarks free. No credit card. Takes 10 seconds.

Add to Chrome