Tactus
The first browser AI Agent extension to support Agent Skills, enabling AI to perform complex tasks through an expandable skill system. 🌟 Star if you like it! | 首个支持 Agent Skills 的浏览器 AI Agent 扩展，让 AI 通过可扩展技能系统执行复杂任务 🌟 如果喜欢请点个 Star！
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What is Tactus?
Tactus is the first browser AI Agent extension that brings Agent Skills to the browser environment. It enables AI Agents to directly understand web page context, call tools, and execute reusable skill scripts. The extension implements the Agent Skills specification, allowing AI to perform complex tasks through an extensible skill system that uses reusable, token-saving workflows instead of repetitive automation operations.
Key features include an Agent Skills system that imports standard skill folders with instructions, scripts, and resources; a smart conversation engine compatible with OpenAI API supporting multi-model switching, ReAct tool calling, and streaming responses; image vision support for multimodal Q&A with pasted images; page understanding capabilities that intelligently extract web content and provide context-aware selection; HTTP MCP support for connecting to MCP Servers with automatic tool discovery; and customizable themes with light/dark/system-following modes plus Chinese-English internationalization.
Tactus is designed for developers who want to create reusable AI skills, AI power users who need multi-model support, privacy-conscious users since all data stays local, and anyone who wants AI assistance directly in their browser for complex web tasks. The extension supports 254 users and has received 5.0/5 stars from ratings.
Tactus pricing
Pricing model: Freemium
Tactus is free and open source. The Chrome Web Store listing shows no paid tiers or subscription plans. The extension is available at no cost with all features included - Agent Skills system, multi-provider AI support, MCP integration, image vision, page understanding, and privacy features are all free. The developer has not identified as a trader and there are no in-app purchases mentioned.
Tactus pros
- First browser AI Agent extension with Agent Skills support
- Open source extension with transparent development
- Model agnostic - supports any OpenAI compatible API
- Native support for Anthropic and Gemini models
- Multi-provider AI with easy model switching
- ReAct paradigm for AI自主 tool usage decisions
- Streaming responses with chain-of-thought display
- Image vision support for multimodal Q&A
- Smart page content extraction using Readability + Turndown
- One-click selection reference for quick questions
- Context-aware extraction avoids redundant content fetching
- HTTP MCP support with automatic tool discovery
- Supports no auth, Bearer Token, and OAuth 2.1 authentication
- All data stored locally - no server upload for privacy
- Reusable skill system saves tokens on repetitive tasks
- First execution script confirmation with permanent trust option
- Light/dark/system theme modes with floating ball toggle
- Chinese-English bilingual interface support
- Conversation history with pagination, editing, and one-click copy
- Skills and files stored in IndexedDB for reliability
Tactus cons
- Only 254 users - very small user base
- Only 5 ratings - limited user feedback
- Language support limited to Chinese and English only
- Version 1.3.2 is still early stage development
- Last updated March 31, 2026 - may have unpatched bugs
- Requires manual skill folder setup for custom skills
- No mobile browser support - Chrome extension only
- Developer email is generic Gmail account not professional domain
Frequently asked questions about Tactus
What is Tactus?
Tactus is the first browser AI Agent extension with Agent Skills, multi-provider AI, and MCP support. It brings AI Agent capabilities into the browser environment, enabling AI to perform complex tasks through an extensible skill system that uses reusable, token-saving workflows instead of repetitive automation operations.
Is Tactus free to use?
Yes, Tactus is completely free and open source. There are no paid tiers, subscriptions, or in-app purchases. All features including Agent Skills, multi-model AI support, MCP integration, and image vision are available at no cost.
What AI models does Tactus support?
Tactus is model agnostic and supports any OpenAI compatible API. It has native support for Anthropic and Gemini models, plus you can configure multiple service providers and switch between models anytime. The extension supports streaming responses and chain-of-thought display.
How does the Agent Skills system work?
The Agent Skills system lets you import skill folders containing SKILL.md (required skill definition and instructions), scripts/ folder with executable JavaScript, references/ folder with documentation, and assets/ folder with resources. You import standard skill folders, execute scripts on pages, and establish trust through first-execution confirmation with optional permanent trust.
Is my data private with Tactus?
Yes, Tactus prioritizes privacy with all data stored locally. No data is uploaded to any server. Conversation history supports pagination, message editing, and one-click copy. Skills and files are stored in IndexedDB in your browser. The developer has disclosed they will not collect or use your data.
What is MCP support in Tactus?
MCP (Model Context Protocol) support lets you connect to HTTP MCP Servers to extend AI capabilities with external tools. Tactus automatically discovers tools from connected servers and supports three authentication modes: no authentication, Bearer Token, and OAuth 2.1.
Can I use images with Tactus?
Yes, Tactus supports image vision for multimodal Q&A. You can paste images directly into conversations to ask visual questions. Visual capability can be configured independently per model, allowing you to enable or disable it based on which AI model you're using.
How does page understanding work?
Tactus uses Readability + Turndown to intelligently extract page content and convert it to Markdown. You can select page text and reference it with one click for questions. The context-aware extraction automatically skips redundant content fetching when skill scripts already provide content. You can also configure raw content extraction mode for specific websites.
What languages does Tactus support?
Tactus supports Chinese (China) and English interface languages. You can switch between Chinese and English anytime in the settings. The extension is designed with Chinese-English internationalization in mind.
How do I install Tactus?
Tactus is available as a Chrome extension from the Chrome Web Store. Search for 'Tactus' or visit the extension page with ID nmhndbemnmmigjooiafblchoegecmkhh. The extension is 1.19MiB in size, version 1.3.2, last updated March 31, 2026. After installation, you can configure AI providers, import skills, and start using AI assistance in your browser.