tapsite

The MCP server for web intelligence extraction. 55 tools that give AI agents the ability to understand websites — not just drive a browser, but extract structured intelligence about design systems, accessibility, performance, content, and more.

Other MCP browser tools let agents click buttons. tapsite lets agents extract a complete color palette, audit WCAG contrast ratios, diff two sites' design tokens, detect tech stacks, or pull structured data with custom CSS/XPath/regex selectors — all as structured JSON that agents can reason about.

55 Tools · 11 Categories · 4 Workflows · Multi-Format Export

Works with Claude, Cursor, Windsurf, and any MCP-compatible AI agent. LangChain/LangGraph integration coming soon.

View the full docs site →

Installation

# Quick start (no install required)
npx -y tapsite

# Or install globally
npm install -g tapsite
npx playwright install chromium
npx playwright install-deps chromium

Add to your AI agent's MCP config:

{
  "mcpServers": {
    "tapsite": {
      "command": "npx",
      "args": ["-y", "tapsite"]
    }
  }
}

First run: Playwright will install Chromium automatically if not already present (~150MB one-time download).

Also available on the MCP Registry and Glama.

What makes tapsite different

Extract design systems — colors, fonts, spacing scales, breakpoints, components, shadows, icons, CSS variables, and contrast ratios from any website. Output as structured JSON or W3C design tokens.

Audit quality — accessibility scoring with WCAG contrast analysis, performance timing (Core Web Vitals), tech stack detection, dark mode support, and animation inventory.

Compare and track — diff two sites side by side, or track a single site over time with snapshot-based temporal diffs. Regressions and improvements are flagged automatically. Disk caching means crawls resume where they left off, and results are reused across sessions.

Work behind login walls — persistent browser sessions with full MFA support. A 3-tier anti-bot escalation system handles protected sites automatically — from stealth scripts to proxy rotation. Log in once manually, then extract across tool calls without re-authenticating. Credentials never enter the chat.

Tools (55)

Session (8)

Content Extraction (6)

Custom Extraction (2)

Design Tokens (5)

Visual Assets (4)

Layout Intelligence (3)

Quality & Compliance (7)

Technology Detection (10)

Network & API (2)

Multi-page (2)

Export (2)

Engine

Resilient extraction engine. Parallel browser pooling for concurrent page extraction. Persistent disk caching — crawls resume where they left off and results are reused across sessions. 3-tier anti-bot escalation with automatic proxy rotation for protected sites.

Workflows (4)

LangChain / LangGraph integration (coming soon)

Native LangChain and LangGraph integration is on the roadmap. When released, it will provide a dedicated Python wrapper with tool subsets and managed session lifecycle.

Security

Prompt injection defense (hidden element filtering + output sanitization), HTTPS enforced, private IPs blocked, auth headers redacted. Credentials never enter the chat — log in manually with full MFA support.

Prompt injection defense

Extractors skip hidden elements (display:none, visibility:hidden, opacity:0, zero-size, clip-hidden) to prevent invisible text injection. All output is scanned for prompt injection patterns — instruction overrides, role hijacking, exfiltration attempts, and tool manipulation are flagged inline as [INJECTION_DETECTED].

Credential safety