Customaise: AI Userscript & Agentscript Manager. Powered by MCP & WebMCP

The web wasn't built for you. Fix that. Plain-language changes for you. Page tools for your AI.

Rewrite any website in plain language. Open every website to your AI agent. Customaise is a Chrome extension that does both. You already know what you want. The button is three menus deep. The export doesn't exist. The dark mode was never shipped. Your agent can't finish the workflow, submit the form, or touch the admin panel. You've learned to live with it. What if you could just say to fix it? You can. You see a problem. You describe it. It gets fixed. Every time you come back. 🟢 ONE EXTENSION. TWO PATHS. UNLIMITED SOLUTIONS. Pick the shape that fits the problem. Stack them on any page. ✅ For you. Reshape any page. Inbox that dims promotions. Feed that kills the sidebar. CRM that sorts itself. Every fix becomes a UserScript in your library, running on your sites, following you across devices. The userscript manager that writes itself. ✅ For your agent. Create any tool. Archive the inbox. Place the trade. Export the lead. Book the flight. AgentScripts turn any page into named tools for browser automation, called in milliseconds through WebMCP, under your own session. 🟢 CONNECT YOUR IDE Cursor, Claude Code, Codex, Antigravity, Kiro, and Windsurf plug straight into Customaise. 18 tools for script lifecycle, tab control, browser context, visual DOM targeting, and WebMCP calls with HITL consent. Uses your IDE's AI subscription, not ours. 🟢 UNDER YOUR CONTROL Every capability a script or agent uses is declared up front and enforced by the extension. ✅ Allow, prompt, or deny per tool. Sensitive calls wait for your explicit OK. ✅ Approve from the tab, or from your phone if you're away from your desk. ✅ @grant gates the GM_* API surface. @connect allowlists network hosts. SRI covers third-party code in @require and @resource. ✅ Every edit creates a restore point. Unlimited undo. 🟢 SHARE WHAT YOU BUILD Publish any script from your Account Portal. Each one gets a dedicated install page you can share. Public listings, private invite links, or links for teams and clients. Subscribers get automatic updates as you improve. 🟢 PRIVACY FIRST In-browser AI runs on paid Gemini APIs. When you connect your IDE through MCP, it uses your IDE's AI subscription instead. Your prompts never train a model. Conversations encrypted on your device with AES-256-GCM. Your key, your control. 🟢 READY WHEN YOU ARE One minute to install. One sentence to make your first fix. 🟢 LINKS Website: https://customaise.com Learn UserScripts: https://customaise.com/learn/userscripts Learn AgentScripts: https://customaise.com/learn/agentscripts Pricing: https://customaise.com/pricing Report bugs: https://github.com/getcustomaise/feedback/issues Changelog: https://github.com/getcustomaise/feedback/blob/main/CHANGELOG.md Chrome Manifest V3. 21 languages supported.