Leapfrog

Multi-session browser MCP for AI agents.
36 tools. 15 parallel sessions. Stealth. HUD. Self-improvement. Up to 10x fewer tokens.

npm i leapfrog-mcp  |  Works with Claude Code, Cursor, Windsurf

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The Problem

Playwright MCP sends ~14,000 tokens for a content-heavy page like Hacker News. Most of that is noise. Your context window fills up. Your agent gets confused. You pay for it.

Leapfrog sends ~1,400 tokens. Same page. Same information. Up to 10x less noise.

┌─────────────────────────────────────────────────────┐
│  Playwright MCP                                     │
│  ████████████████████████████████████████  ~14,000   │
│                                                     │
│  Leapfrog                                           │
│  █████                                    ~1,400    │
└─────────────────────────────────────────────────────┘
          tokens per page (Hacker News, real test)

Savings range from 2-10x depending on page complexity. Content-heavy pages see the biggest wins. Dense forms see the smallest. The median across real-world sites is ~4-5x.

Quick Start

npx leapfrog-mcp --doctor          # verify everything works
npx leapfrog-mcp --stealth-audit   # test all 19 stealth patches
npx leapfrog-mcp --config          # print MCP config to paste

Add to ~/.mcp.json (Claude Code) or your editor's MCP config:

{
  "leapfrog": {
    "command": "npx",
    "args": ["-y", "leapfrog-mcp"],
    "env": {
      "LEAP_MAX_SESSIONS": "15",
      "LEAP_TILE": "true",
      "LEAP_HUD": "true",
      "LEAP_AUTO_CONSENT": "true"
    }
  }
}

Leapfrog uses playwright-core (15MB) instead of playwright (1.6GB) and does not bundle a browser. Either:

• Set LEAP_CHANNEL=chrome to use your installed Chrome/Chromium (recommended)
• Or run npx playwright-core install chromium to install the bundled Chromium binary
• Or set LEAP_CDP_ENDPOINT to connect to an already-running Chrome instance

Feature Matrix

	Leapfrog	Playwright MCP	agent-browser
Tokens per page	~1,200-2,500	~3,800-15,000	~300
Parallel sessions	15	1	1
Session isolation	Yes	No	No
Multi-tab / popups	Yes	No	No
Network intercept	Yes	No	No
Console capture	Yes	Yes	No
Stealth / anti-bot	Yes	No	No
Smart wait (5 types)	Yes	Basic	No
Crash recovery	Yes	No	No
Batch actions (100/call)	Yes	No	No
Init script injection	Yes	Yes	No
Drag / upload / resize	Yes	Yes	No
Per-session proxy	Yes	No	No
Humanization (opt-in)	Yes	No	No
Auth profile reuse	Yes	No	No
Cookie persistence	Yes	No	No

Stealth

Leapfrog ships 19 anti-detection patches enabled by default (LEAP_STEALTH=true). Four modes:

• true (default) — all 19 patches active
• passive — removes automation signals only (webdriver, HeadlessChrome). Does NOT fake identity (WebGL, fonts, audio). Better for sites where trust matters more than evasion.
• auto — per-domain EXP3 bandit selects the optimal stealth configuration based on what's worked before
• false — no stealth patches

These cover the vectors that fingerprint services like CreepJS and fingerprint-pro actually check:

• Client Hint

... View full README on GitHub