wavexis-mcp 1.1.0

MCP server exposing the wavexis browser automation library to LLMs — 149 tools, 13 capability tiers, zero Node.js

WaveXisMCP

MCP server that exposes the wavexis browser automation library to LLMs. 149 tools across 13 capability tiers. 100% Python, no Node.js, no Chromium download — uses your existing Chrome/Edge.

Why WaveXisMCP?

• Zero install — uses your local Chrome/Edge, no 200MB Chromium download (~5MB package)
• 149 tools — the most comprehensive browser automation MCP (vs ~70 for Playwright MCP)
• Dual backend — CDP (Chromium-native) + BiDi (W3C cross-browser) with per-session selection
• 13 capability tiers — enable only what you need via --caps
• Python-native — no Node.js runtime required
• Dual mode — stateless one-shot calls or persistent sessions
• Structured errors — every error includes an actionable suggestion

Install

pip install wavexis-mcp

With CDP backend (Chromium):

pip install "wavexis-mcp[cdp]"

Or run without installing (recommended):

uvx wavexis-mcp

Quick Start

Add to your MCP client config (Claude Desktop, Cursor, Windsurf, VS Code):

{
  "mcpServers": {
    "wavexis": {
      "command": "uvx",
      "args": ["wavexis-mcp", "--caps", "all"]
    }
  }
}

Or with pip:

{
  "mcpServers": {
    "wavexis": {
      "command": "wavexis-mcp",
      "args": ["--caps", "all"]
    }
  }
}

Capability Tiers

Tier	Flag	Tools	Key features
Core	always on	42	Session, navigation, screenshot, PDF, scrape, eval, DOM, input, cookies, tabs
Network	--caps=network	9	Headers, UA, block, throttle, cache, HAR, intercept, mock, request list
Storage	--caps=storage	13	localStorage, sessionStorage, cache storage, IndexedDB, state save/restore
Emulation	--caps=emulation	9	Device, viewport, geolocation, timezone, dark mode, locale, CPU, touch, sensors
A11y	--caps=a11y	3	Accessibility tree snapshot (LLM-friendly element refs)
Interactions	--caps=interactions	5	Dialogs, downloads, permissions
DevTools	--caps=devtools	23	Performance, CSS, debugging, overlay, console, security, window mgmt
Vision	--caps=vision	6	Coordinate-based mouse (pixel-precise)
Video	--caps=video	4	Video recording, chapters, action overlay
Testing	--caps=testing	4	Assertions, locator generation
Workflows	--caps=workflows	5	Multi-action YAML, raw CDP/BiDi, browser contexts
Data	--caps=data	6	Codegen, Lighthouse audit, extract, websocket intercept, crawl, visual diff
Experimental	--caps=experimental	20	Service workers, animations, WebAuthn, WebAudio, media, cast, bluetooth
Total	--caps=all	149

Default: --caps=core (42 tools). Enable all: --caps=all. Enable specific: --caps=network,storage,emulation.

vs Playwright MCP

Feature	Playwright MCP	WaveXisMCP
Language	TypeScript	Python
Node.js required	Yes	No
Downloads Chromium	Yes (~200MB)	No (uses existing Chrome/Edge)
Install size	~200MB+	~5MB
Total tools	~70	149
Capability tiers	Yes (--caps)	Yes (13 tiers)
Dual protocol	No	CDP + BiDi
Backend selection	No	Yes (per session)
Raw CDP/BiDi access	No	Yes (escape hatch)
Multi-action YAML	No	Yes
Video recording	No	Yes
Lighthouse audit	No	Yes
WebAuthn/Bluetooth	No	Yes

Configuration

Stateless mode (one-shot)

Call any tool with a url parameter — the browser launches, executes, and closes automatically:

wavexis_screenshot(url="https://example.com", full_page=true)

Session mode (multi-step)

Open a session, chain multiple actions, close when done:

wavexis_session_open(backend="cdp", headless=false)
→ {"session_id": "abc-123"}

wavexis_navigate(session_id="abc-123", url="https://example.com")
wavexis_click(session_id="abc-123", selector="#login")
wavexis_screenshot(session_id="abc-123")
wavexis_session_close(session_id="abc-123")

Backend selection

• CDP (default): Direct WebSocket to Chrome/Edge. No driver needed. 57 CDP domains.
• BiDi: W3C standard. Cross-browser (Firefox, Chrome). Needs ChromeDriver/EdgeDriver.

pip install "wavexis-mcp[cdp]"   # CDP backend (Chromium)
pip install "wavexis-mcp[bidi]"  # BiDi backend (cross-browser)

Ecosystem

WaveXisMCP (MCP server, 149 tools)
└─ wraps → wavexis (browser automation library)
               ├─ cdpwave (CDP backend, Chromium-native)
               └─ bidiwave (BiDi backend, W3C cross-browser)

Documentation

• Architecture
• Quick Start
• Configuration
• HTTP Transport
• Docker Deployment
• Resources & Prompts
• Rate Limiting
• Tool Reference

HTTP Transport (v0.2.0)

Run WaveXisMCP as an HTTP server for CI/CD, shared instances, or Docker:

# HTTP on localhost
wavexis-mcp --transport http --port 8765

# HTTP with all tiers
wavexis-mcp --transport http --port 8765 --caps all

# HTTP with remote access (use behind a reverse proxy!)
wavexis-mcp --transport http --allow-remote --port 8765

Binds to 127.0.0.1 by default. Use --allow-remote for 0.0.0.0.

Docker

# Pull and run
docker run -p 8765:8765 ghcr.io/mathiaspaulenko/wavexis-mcp

# Or build locally
docker build -t wavexis-mcp .
docker run -p 8765:8765 wavexis-mcp

# Docker Compose
docker-compose up

See Docker docs for details.

Natural Language Interaction (M1)

Use wavexis_act to interact with pages using natural language:

wavexis_session_open(backend="cdp")
→ {"session_id": "abc-123"}

wavexis_navigate(session_id="abc-123", url="https://example.com")

wavexis_act(session_id="abc-123", instruction="click the login button")
→ {"action": "click", "element": {"ref": "el-3", "role": "button", "name": "Login"}, "status": "ok"}

The wavexis_act tool takes an a11y snapshot, matches the instruction to an element using keyword scoring, and executes the detected action (click, type, fill, hover). No external LLM calls — pure heuristic matching.

MCP Resources & Prompts (M3)

Resources (read-only browser state):

• wavexis://session/{id}/url — current page URL
• wavexis://session/{id}/cookies — cookies as JSON
• wavexis://session/{id}/console — console messages
• wavexis://session/{id}/tabs — open tabs

Prompts (workflow templates):

• scrape_page(url, selector) — scrape and extract content
• audit_page(url) — full a11y + performance audit
• fill_form(url, fields) — fill a form on a page
• debug_page(url) — debug console, network, performance

Rate Limiting (M4)

Per-session token bucket rate limiting:

# 10 calls/sec, burst of 5
wavexis-mcp --rate-limit 10 --rate-burst 5

When exceeded, returns {"error": "rate_limited", "retry_after_ms": N}.

Development

git clone https://github.com/MathiasPaulenko/wavexis-mcp.git
cd wavexis-mcp
pip install -e ".[dev]"
ruff check .
mypy src/wavexis_mcp/
pytest tests/ -v

License

MIT © Mathias Paulenko