Use Zetlyn in Claude

Claude on the web, desktop and mobile

1. Open Settings → Connectors → Add custom connector.
2. Enter the URL https://zetlyn.com/mcp.
3. Connect, sign in to Zetlyn in the window that opens, and allow Claude.

Claude Code

claude mcp add --transport http --scope user zetlyn https://zetlyn.com/mcp

Then run /mcp in Claude Code to sign in.

What to ask

• "Watch the price on https://books.toscrape.com/catalogue/a-light-in-the-attic_1000/index.html and tell me when it drops below 40 £."
• "Tell me when a new version of Rust is released."
• "What changed on my watched pages this week?"
• "Check that page every 15 minutes instead."
• "Stop watching the Rust page."

Claude previews the page, picks the place, and can try places before watching them. It never pays for you: when a watch needs a subscription, it gives you a link to open yourself.

The tools

preview_page, read_place, watch_page, update_watch, list_changes, list_watches, get_watch, end_watch, get_account, subscribe_link. All are described in the docs.

ChatGPT · Cursor · All use cases