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
Page classification (18)	Yes	No	No
Session memory	Yes	No	No
API intelligence	Yes	No	No
Adaptive wait + auto-retry	Yes	No	No
CAPTCHA auto-resolve	Yes	No	No
Self-improvement (9 dims)	Yes	No	No
Record / replay	Yes	No	No
Pagination extraction	Yes	No	No
Incremental snapshots (diff)	Yes	No	No
Stealth self-test CLI	Yes	No	No
SSRF protection	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