webscout-mcp

Web search and fetch tools for AI agents, as an MCP server. Search, fetch, crawl, and extract structured data from the web — no API keys, no per-request billing, everything stays on your machine.

Install

pip install webscout-mcp

Requires Python 3.10+.

Quick start

Add to your MCP client config (Claude Code, Cursor, Codex, etc.):

{
  "mcpServers": {
    "webscout": {
      "command": "webscout-mcp",
      "args": []
    }
  }
}

That's it. Your agent gets six tools:

• web_search — search via Bing with automatic DuckDuckGo HTML fallback, no key needed
• web_fetch — fetch a page and extract the main article (markdown/text/html)
• web_crawl — concurrent BFS crawl with depth/page limits, respects robots.txt
• web_extract — pull structured data with CSS selectors, attributes, regex
• cache_stats — inspect the local cache
• cache_clear — wipe the cache

CLI usage

In addition to running as an MCP server, you can use webscout-mcp directly from the command line:

# Search the web (outputs JSON)
webscout-mcp search "python async libraries" --max-results 5

# Fetch a page (raw content)
webscout-mcp fetch https://example.com --extract --format markdown --raw

# Crawl a site
webscout-mcp crawl https://example.com --depth 2 --pages 10

# Start MCP server (default if no command given)
webscout-mcp serve --transport stdio

Usage examples

Search

web_search(query="best python async libraries", max_results=5)

Returns structured results with title, URL, snippet, and which backend served the request (bing or duckduckgo). If Bing fails or changes its markup, the engine automatically falls back to DuckDuckGo's HTML version — no configuration needed.

Fetch a page

web_fetch(url="https://example.com", extract=true, output_format="markdown")

extract=true runs trafilatura to strip nav, ads, and sidebars — you get clean article content, not raw HTML.

Extract structured data

web_extract(
  url="https://example.com/products",
  rules='[
    {"name": "titles", "selector": ".product h2", "multiple": true},
    {"name": "prices", "selector": ".price", "regex": "\\$([\\d.]+)", "multiple": true},
    {"name": "links", "selector": "a.product", "attribute": "href", "multiple": true}
  ]'
)

Each rule supports selector, attribute, multiple, regex, and default.

Crawl a site

web_crawl(seed_url="https://example.com", max_depth=2, max_pages=10, concurrency=5)

Pages at each depth level are fetched concurrently (controlled by concurrency, default 5). The crawler respects robots.txt by default — disallowed URLs are skipped and counted in skipped_robots. Same-domain restriction is on by default.

Use as a Python library

import asyncio
from webscout_mcp import Config, Fetcher, SearchEngine

async def main():
    config = Config.from_env()
    config.ensure_dirs()

    fetcher = Fetcher(config)
    result = await fetcher.fetch("https://example.com", extract=True)
    print(result.title)
    print(result.content[:500])
    await fetcher.close()

    search = SearchEngine(config)
    results = await search.search("python async", max_results=5)
    for r in results:
        print(f"{r.position}. {r.title} — {r.url} ({r.backend})")
    await search.close()

asyncio.run(main())

How it works

• Search tries Bing first, then DuckDuckGo HTML — both via direct HTTP scraping, no API key. Results are cached by query.
• Fetching uses httpx with exponential-backoff retries, per-domain token-bucket rate limiting, and a 5 MB content cap.
• Content extraction uses trafilatura — the same library behind many read-it-later services.
• Caching is SQLite with TTL and a size cap; old entries are evicted automatically. Repeat fetches and searches cost nothing.
• Crawling is concurrent BFS with configurable depth, page count, concurrency, same-domain restriction, and robots.txt compliance.
• Logging is structured and configurable via WEBSCOUT_LOG_LEVEL (DEBUG/INFO/WARNING/ERROR) and WEBSCOUT_LOG_JSON=1 for JSON output.

Everything runs locally. No data leaves your machine.

Configuration

All settings have sensible defaults. Override via environment variables (WEBSCOUT_ prefix) or CLI flags:

CLI flags override env vars:

webscout-mcp --cache-ttl 3600 --cache-dir /tmp/webscout serve

Transports

# stdio (default — works with Claude Code, Cursor, etc.)
webscout-mcp

# SSE (for remote or browser-based clients)
webscout-mcp serve --transport sse --host 0.0.0.0 --port 8000

Changelog

0.2.0

• Multi-backend search: Bing + DuckDuckGo HTML with automatic failover
• Concurrent crawler with configurable parallelism
• robots.txt compliance (configurable, on by default)
• CLI subcommands: search, fetch, crawl, serve
• Structured logging with console and JSON formatters
• Custom exception hierarchy for better error handling
• New config: WEBSCOUT_SEARCH_BACKENDS, WEBSCOUT_CRAWLER_CONCURRENCY, WEBSCOUT_RESPECT_ROBOTS

0.1.0

• Initial release: web_search, web_fetch, web_crawl, web_extract, cache_stats, cache_clear
• SQLite cache with TTL and size-based eviction
• Per-domain token-bucket rate limiting
• Exponential backoff retries
• trafilatura content extraction

Development

git clone https://github.com/wxs-lang/webscout-mcp.git
cd webscout-mcp
pip install -e ".[dev]"
pytest

License

MIT