---
skill_id: web-scraper-structured-extractor
evaluation: free
price_usd_full: 6.99
challenge: https://lvlltd.com/api/pay?skill=web-scraper-structured-extractor
outline: https://lvlltd.com/skills/web-scraper-structured-extractor/outline.json
standards: x402, ERC-7857
---

# Free sample — Web Scraper Structured Extractor

**Skill ID:** `web-scraper-structured-extractor`  
**Full unlock:** $6.99 USDC via x402 on Base  
**Challenge:** https://lvlltd.com/api/pay?skill=web-scraper-structured-extractor  
**Outline JSON:** https://lvlltd.com/skills/web-scraper-structured-extractor/outline.json

## Summary

Schema-first scraping: define target JSON, extract with resilient selectors, respect robots/ToS, detect layout drift, and export clean datasets with provenance.

## When to use

- Need structured public data
- Layout changes break scrapers
- Research/price watch agents

## Decision criteria (buy vs skip)

- You need this when: Need structured public data
- You get capability: Define schema
- Budget fits: full unlock is $6.99 USDC on Base
- You can automate unlock via HTTP 402 without a browser
- You only need teaser/outline first — sealed src/ops stay locked until payment

## Outline (preview)

1. Define schema
2. Check robots/ToS
3. Build extractors
4. Validate records
5. Drift detect
6. Export

## Capabilities (preview)

- Define schema
- Check robots/ToS
- Build extractors
- Validate records
- Drift detect
- Export

## What you get after payment

- SKILL.md (teaser public)
- agent-install.json (public meta)
- src/index.js (stub public; full after unlock)
- Full sealed: src/, schemas/, ops/* (when present) after verified X-PAYMENT

## Agent buy path (zero human UI)

```
GET  https://lvlltd.com/skills/web-scraper-structured-extractor/outline.json
GET  https://lvlltd.com/api/pay?skill=web-scraper-structured-extractor   → HTTP 402
# transfer maxAmountRequired USDC to payTo on Base
POST https://lvlltd.com/api/pay
  X-PAYMENT: {"txHash":"0x…","skill":"web-scraper-structured-extractor"}
# response.sealed_pack.files = full pack
```

## Sample excerpt

# Web Scraper Structured Extractor

**Price:** $6.99 / unlock
**Category:** Browser

## Summary

Schema-first scraping: define target JSON, extract with resilient selectors, respect robots/ToS, detect layout drift, and export clean datasets with provenance.

---

---
name: web-scraper-structured-extractor
description: Extract structured data from web pages into schemas with robots ethics and layout drift detection. Use when web scraper structured extractor, scrape to JSON schema, structured scrape, extract data from page, or /web-scraper-structured-extractor.
---

# Web Scraper Structured Extractor

Schema-first scraping: define target JSON, extract with resilient selectors, respect robots/ToS, detect layout drift, and export clean datasets with provenance.

## Quick Reference
| Item | Value |
|------|-------|
| Category | Browser |
| Unlock | $6.99 USDC (x402 Base) |
| Triggers | web scraper structured extractor, scrape to JSON, structured scrape, /web-scraper-structured-extractor |

## When to use
- Need structured public data
- Layout changes break scrapers
- Research/price watch agents

## Core workflow
1. Confirm legal/ethical basis
2. Sample pages
3. Write extractors
4. Validate
5. Schedule with rate limits

## Procedures (non-obvious)
Store source URL + fetched_at. Prefer official APIs when available.
Do not bypass paywalls or auth you do not own.
On drift fail open with alert if required keys missing.

## Edge cases
- Infinite scroll
- Lazy-loaded content
- Multi-locale pages

## Failure modes
- Ignoring robots
- Silent schema violation

## Verification
- Sample validates schema
- Rate limit documented

## Artifact outputs
- `schema.json`
- `records.jsonl`
- `drift-report.md`

## Related skills
- playwright-browser-orchestrator
- agent-browser-navigator

## Super Alignment Contract
- Scalable oversight method: process supervision + human+AI critique before high-blast actions
- Corrigibility guarantees: shutdown, steerability, non-deception; operator may abort mid-run
- Value model: Partnership Agreement + 5 Behavioral Protocols
- Drift detection: flag invented evidence, skipped verification, or revenue-over-truth optimization
- Red-team surface: prompt i

…(remainder sealed after x402 unlock)…