Works with the AI tools you already use

    CClaude CodeCCursorCCodex CLIGGitHub CopilotGGemini CLIVVS CodeWWindsurfMManus+14 more

    Nex Page Watch

    2

    Deploy a production-ready Manifest V3 Chrome extension for visual webpage monitoring and change alerts.

    $5

    30-day refund guarantee

    Secure checkout via Stripe

    0 installsSecurity scanned

    See it in action

    You say

    I need a Chrome extension that alerts me when the price changes on a specific website. Can you provide the source for a page monitor?

    Your agent does

    I've generated the Nex Page Watch extension in `/assets/extension/`. Key components: - `manifest.json`: Manifest V3 config - `background.js`: Alarm-based scheduler - `diff.js`: Visual diffing engine To install: Open chrome://extensions, enable Developer Mode, and 'Load unpacked' the folder.

    What you get

    Deploy a fully functional Manifest V3 extension with no build steps required.Implement visual diffing logic using offscreen documents for performance.Fork a proven 'action-on-click' extension architecture for custom tools.Schedule background webpage checks using the Chrome Alarms API.

    About this skill

    What it does

    Nex Page Watch is a production-ready Chrome Extension (Manifest V3) that monitors web pages for content changes. It provides a complete, "no-build" codebase using vanilla JS, HTML, and CSS. When a monitored page changes, users receive a browser notification and a detailed visual diff highlighting additions, removals, and word-level modifications.

    Why use this skill

    Unlike basic scaffolding prompts, this skill delivers a fully functional, shipped product. It bypasses the complexity of modern build chains, offering a "Load Unpacked" workflow that is perfect for rapid prototyping or immediate deployment. It solves the architectural challenge of performing heavy diffing operations in an extension by utilizing offscreen documents, ensuring the browser remain responsive.

    Supported architecture & features

    • Manifest V3: Built on the latest Chrome extension standards.
    • Offscreen API: Off-thread processing for performance-intensive diffing.
    • Alarms & Storage: Reliable background scheduling and local data persistence.
    • Vanilla Stack: Zero dependencies—no npm, no Webpack, no Vite.

    The Output

    You receive the complete assets/extension/ source directory containing the manifest, background scripts, content scripts, and UI files. The agent also provides a comprehensive guide on the developer loop, customization, and Web Store packaging steps.

    Built by Nex AI. More skills and info at nex-ai.be and slopsome.com.

    frontend
    chrome-extension
    manifest-v3
    vanilla-js
    web-monitoring
    devtools

    How to install

    Drop the file into your AI Agent. Works with Claude, Cursor, ChatGPT, and 20+ more.

    Reviews

    No reviews yet

    Be one of the first to try it. Every listed skill passes our trust checks below.

    Security scanned

    Passed our 8-point scan before listing

    Fresh listing

    Recently published to Agensi

    30-day refund

    Not a fit? Get your money back

    Trust & safety

    Security scanned

    Verified clean 17 days ago

    Listed1 month ago
    Updated17 days ago

    Frequently Asked Questions