Web Data Extractor 🕷️

> ⚠️ Security Note — This skill sends user-provided URLs over the network and stores fetched page contents locally in a cache (memory/scraper-cache/cache.json). Do not use with sensitive, authenticated, internal, or attacker-controlled URLs until redirect targets are revalidated. Clear the cache (rm memory/scraper-cache/cache.json) after scraping if page contents or URLs may be sensitive.

Stop copying data by hand. Start extracting it automatically.

The Problem

Web content is everywhere but inaccessible to agents. web_fetch gets raw HTML, but you need structure — tables, prices, lists, article text — to make it useful.

Smart Scraper turns raw HTML into structured data with one command.

Quick Start

Extract everything from a page

node skills/smart-scraper/smart-scraper.js --extract https://example.com

Returns title, headings, paragraphs, links, tables, lists, prices, images, and metadata.

Extract tables only

node skills/smart-scraper/smart-scraper.js --extract --table https://example.com/pricing

Extract lists only

node skills/smart-scraper/smart-scraper.js --extract --list https://example.com/blog

Extract prices

node skills/smart-scraper/smart-scraper.js --extract --price https://example.com/products

Extract article content

node skills/smart-scraper/smart-scraper.js --extract --article https://example.com/blog/post

Parse raw HTML

node skills/smart-scraper/smart-scraper.js --parse "<html>...</html>"

Status overview

node skills/smart-scraper/smart-scraper.js --status

Features

HTML Parsing

• Title extraction
• Heading hierarchy (h1-h6)
• Paragraph extraction (filters short fragments)
• Link extraction with text
• Image extraction with alt text
• Metadata/meta tag extraction

Table Extraction

• Full table structure with rows and cells
• Handles th and td elements
• Strips nested HTML from cells

List Extraction

• Both ordered and unordered lists
• List item text extraction
• Preserves list structure

Price Detection

• Matches USD ($), EUR (€), GBP (£), JPY (¥) formats
• Handles comma-separated thousands (e.g., $1,234.56)
• Returns raw price strings

Article Mode

• Focuses on heading + paragraph structure
• Shows first 5 paragraphs as preview
• Ideal for blog posts and documentation

Caching

• 5-minute TTL on fetched pages
• LRU eviction: max 50 entries or 10MB
• Reduces redundant network calls
• Cache stats via --status

Configuration

Cache stored in: memory/scraper-cache/cache.json

Override data directory:

--dir /path/to/data

Security

• URL validation — only http/https to public hosts; blocks file://, gopher://, data:, localhost, private IPs, cloud metadata endpoints
• Redirect validation — each redirect target is re-validated against the same SSRF blocklist; attacker-controlled URLs cannot redirect to internal services
• Redirect limit — max 5 redirects to prevent loops and SSRF
• Rate limiting — 100ms minimum between requests
• Bounded regex — all patterns have {0,N} limits to prevent ReDoS
• Cache eviction — LRU with 50-entry / 10MB limits
• No eval, no execSync, no command injection — pure parsing, no shell interaction

Agent Protocol

When extracting web content:

1. Extract everything first — --extract <url> for a full overview
2. Target specific data — --extract --table/list/price/article for focused extraction
3. Parse raw HTML — --parse when you already have HTML from another tool
4. Check cache — --status to monitor cache usage
5. Combine with API Gateway — Use API Gateway for authenticated or rate-limited sites

Limitations

• Regex-based HTML parsing (not a full DOM parser)
• No JavaScript execution (SPA content not supported)
• Basic price detection (regex-based, not ML)
• 15-second fetch timeout per page
• Only http/https URLs to public hosts (no file://, localhost, private IPs, cloud metadata)
• Max 5 redirects per request
• Rate limited to 1 request per 100ms

Comparison

Smart Scraper gives you structured extraction + caching with zero dependencies.

Design Principles

1. Zero setup — Works immediately, no config needed
2. No dependencies — Pure Node.js http/https, no npm packages
3. Structured output — Returns parsed data, not raw HTML
4. Cached — Reduces redundant fetches automatically
5. Multi-mode — Extract everything or target specific data types