web-scraper (Claude Skill) — インストール & ライブデモ

なぜ使うのか

主な機能

Phased reconnaissance — APIs > sitemaps > static HTML > browser
Template picker: Cheerio for static, Playwright for JS-heavy
Apify Actor TypeScript-first workflow
Selective stealth: only when protection signals detected
Session recording + replay for debugging

ライブデモ

実際の動作

web-scraper-skill.replay ▶ 準備完了

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インストール

作者のリポジトリ · Claude Skills の公式ドキュメント

ユースケース

実用的な使い方： web-scraper

Scrape a static listing site into a structured dataset

👤 Data engineers pulling public data (directories, price lists, public records) ⏱ ~45 min intermediate

使うタイミング： You need a dataset from a public site that doesn't have an API.

フロー

Let the skill do recon

Use web-scraper. Target: https://example.com/listings. I want name + URL + category. Recon first — tell me the cheapest extraction path.✓ コピーしました

→ Skill reports: 'sitemap.xml available, use Cheerio'
Scaffold the Apify Actor

Scaffold a TypeScript Apify Cheerio actor for that extraction.✓ コピーしました

→ Actor tree + main.ts ready to run
Run and iterate

Run locally on 10 pages; tighten selectors if needed.✓ コピーしました

→ Clean JSON output

結果： An Apify Actor you can deploy for scheduled scrapes.

注意点

Jumping to Playwright when Cheerio would do — Trust the recon — headful browsers 10x the cost unnecessarily

組み合わせ： apify · filesystem

Discover and use a site's undocumented JSON API instead of HTML

👤 Scraper devs who want reliability ⏱ ~30 min intermediate

使うタイミング： The page is a SPA and HTML is gross, but the XHR calls are clean JSON.

フロー

Run API-discovery phase

Use web-scraper phase 1 — API discovery on https://example.com/app. Enumerate XHR/fetch endpoints.✓ コピーしました

→ List of endpoints with observed payloads
Build the JSON-based actor

Generate an actor that hits those endpoints directly with auth as needed.✓ コピーしました

→ Lightweight fetch-based actor

結果： A far more stable scrape than HTML parsing.

注意点

Private/session-auth APIs that break when token rotates — Plan token-refresh logic or fall back to browser flow

組み合わせ

他のMCPと組み合わせて10倍の力を

web-scraper-skill + apify

Deploy the scaffolded actor to Apify for scheduled runs

Deploy this actor to my Apify account and schedule it daily.✓ コピーしました

web-scraper-skill + filesystem

Keep the actor code in-repo alongside the consuming app

Scaffold into scrapers/ and commit with the main project.✓ コピーしました

ツール

このMCPが提供する機能

ツール	入力	呼び出すタイミング
recon	url	Always first
scaffold_actor	template (cheerio\|playwright), target	After recon picks template
record_session	url	Debugging dynamic sites
run_local	actor path, limit	Iteration phase

コストと制限

運用コスト

APIクォータ: Apify has its own compute + proxy quotas
呼び出しあたりのトークン: Moderate — scaffold and iteration loops
金額: Free skill; Apify costs separate
ヒント: Prefer Cheerio — one of the cheapest run profiles on Apify

セキュリティ

権限、シークレット、影響範囲

最小スコープ： Apify API token with actor:read + actor:write

認証情報の保管： APIFY_TOKEN in env

データ送信先： Whatever sites you target + Apify platform

Respect robots.txt and each site's Terms of Service. Skill is not an anti-ToS tool — use it on data you're allowed to collect.
Public, non-authenticated data only unless you have explicit permission.

トラブルシューティング

よくあるエラーと対処法

Cheerio returns empty selectors

Content is JS-rendered — rerun recon, expect Playwright template

Playwright times out

Bump navigation timeout; consider waiting for specific selector instead of networkidle

403 / bot-block page

Stop and reconsider. This is the legit signal to re-check ToS, not a cue to escalate stealth.

代替案

web-scraper 他との比較

代替案	代わりに使う場面	トレードオフ
Direct Apify console	You already know which template you need	No recon phase
firecrawl	You just need markdown of a page, not structured extraction	No actor scaffolding

その他

リソース

📖 GitHub の公式 README を読む

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