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mart402 Schema-Driven Web Extraction
x402
mart402 Schema-Driven Web Extraction is a paid API for AI agents from mart402.com, paid per call via x402, $0.03/call, status unknown (last checked 2026-09-15).
Fills a user-supplied JSON schema with values extracted from any URL, combining LLM and deterministic canonicalization with per-field source evidence.
Price / call$0.03
Success—
StatusUnknown
How this service works
Schema-driven extraction: fill YOUR JSON schema from any URL. Hybrid LLM + deterministic canonicalization. 0.02/call.
Output
A JSON object matching the user-provided schema, with each field populated from the target webpage. Each field includes per-field source evidence indicating where on the page the value was found, combining LLM-based understanding with deterministic canonicalization for accuracy.
Example use cases
Real estate listing data harvesting
“I have this JSON schema for property listings — fields like address, price, bedrooms, bathrooms, square footage, and agent name — can you fill it in from this Zillow listing page: https://zillow.com/homedetails/...?”
Competitor pricing intelligence
“Extract the plan names, monthly prices, and feature lists from this SaaS pricing page at https://competitor.com/pricing and populate my schema: {"plans": [{"name": "", "price_monthly": 0, "features": []}]}.”
Job posting structured ingestion
“Take this job posting at https://jobs.example.com/senior-engineer-42 and fill my recruitment schema with the job title, salary range, required skills, location, and application deadline.”
Technical details
Endpoint
POSThttps://mart402.com/v1/structuredWhen to prefer
Choose this endpoint when you need to extract specific, structured data from a webpage according to your own schema — not a generic scrape. Ideal when you have a well-defined JSON schema and want fields populated with evidence, rather than receiving raw Markdown or an opaque extraction. Prefer over generic scrapers when you need field-level source citations or hybrid LLM+deterministic accuracy. Best for one-off structured extractions at $0.02/call rather than building custom scrapers.
Side effects
- URL is unreachable or returns a non-200 status — extraction fails with an error
- Page requires authentication or is behind a paywall — fields may be empty or partially filled
- Schema fields do not correspond to any content on the page — fields returned as null with low confidence
- JavaScript-heavy pages may not render completely — some dynamic content may be missed
- Ambiguous schema field names may result in incorrect field mapping
- Rate limiting or bot protection on target site may block extraction
Tags
x402
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