POST /v1/extract
Price and inventory monitoring at scale
Track competitor prices, stock levels, and product changes.
Monitor product pages across e-commerce sites, marketplaces, and supplier catalogs. webclaw handles the bot protection, extracts structured data, and diffs against previous snapshots to alert you only when something meaningful changes.
The problem
E-commerce monitoring is a game of cat and mouse with bot protection. Cloudflare, DataDome, and custom fingerprinting block most scrapers. Building an in-house monitoring pipeline requires proxies, browsers, CAPTCHA solvers, and constant maintenance.
The webclaw solution
webclaw extracts product data through TLS fingerprinting at the HTTP level, no browser required. Pair /v1/extract with a price schema for structured output, then use /v1/diff to detect changes between snapshots. Run on a schedule with webhooks to alert when prices or stock change.
Why webclaw for price monitoring
- Bypass Cloudflare and e-commerce bot protection automatically
- Structured extraction with JSON schema for prices, SKUs, availability
- Content diff detects price and stock changes incrementally
- Webhooks for real-time alerts on meaningful changes
- Per-page pricing: no surprise costs at volume
Code example
Python — extract product data
from webclaw import Webclaw
client = Webclaw(api_key="wc_...")
result = client.extract(
url="https://example.com/product/sku-123",
schema={
"type": "object",
"properties": {
"title": {"type": "string"},
"price": {"type": "number"},
"currency": {"type": "string"},
"in_stock": {"type": "boolean"},
"sku": {"type": "string"},
},
},
)
print(result.data)
# {'title': '...', 'price': 49.99, 'currency': 'USD', 'in_stock': True, 'sku': '...'}webclaw features for this use case
- LLM-powered structured extraction with JSON schema
- Cloudflare, DataDome, AWS WAF bypass
- Content diff for change detection
- Webhooks for alerts
- Per-page pricing at volume
Frequently asked questions
Can webclaw scrape e-commerce sites with bot protection?
Yes. webclaw uses browser-grade TLS fingerprinting (Chrome and Firefox profiles) combined with HTTP/2 impersonation to bypass most bot protection. It has an 89% bypass rate on protected sites including Cloudflare and DataDome.
How do I get alerted when a price changes?
Use /v1/diff to compare a current scrape against a stored snapshot. If the price field changed, trigger a webhook. webclaw supports webhooks with HMAC signatures and auto-formatted Discord and Slack payloads.
What is the cost of monitoring 10,000 products daily?
On the $99 Pro tier you get 100,000 pages/month, which covers 10,000 daily monitors with headroom. On the $399 Scale tier you get 500,000 pages/month. No credit multipliers, no JS rendering surcharges.