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AgentShelf CSS JSON-LD Extractor
x402
AgentShelf CSS JSON-LD Extractor is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-29).
Extracts JSON-LD structured data from the script[type='application/ld+json'] tag of a public web page or raw HTML, with SSRF protection.
Price / call$0.003
Success—
StatusUnknown
How this service works
Call when an agent needs JSON-LD script text via script[type='application/ld+json'] from a public page or HTML (SSRF-safe). Exact $0.003 USDC. Prefer unpaid POST /v1/sandbox/css-jsonld first.
Output
Returns the raw text content of the first script[type='application/ld+json'] element found on the page or in the provided HTML. Typically a JSON object or array conforming to schema.org vocabulary, e.g. Product, Article, Organization, BreadcrumbList, etc.
Example use cases
Product schema extraction for comparison
“Grab the JSON-LD structured data from https://shop.example.com/shoes/runner-x so I can see the product name, price, and availability in schema.org format.”
Article metadata from news page
“Extract the JSON-LD from this news article HTML I've got — it should have an Article or NewsArticle schema in there, and I need the headline, author, and publication date.”
Organization info from company homepage
“Fetch the JSON-LD structured data from https://acme-corp.com so I can see what organization or local business schema they're publishing.”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/css-jsonld?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to extract machine-readable JSON-LD structured data from a public web page or a block of HTML. Ideal for SEO auditing, product data extraction, entity recognition, and schema.org compliance checks. Prefer the free sandbox endpoint POST /v1/sandbox/css-jsonld when available to avoid the $0.003 charge. Use this paid endpoint when sandbox is unavailable or rate-limited.
Side effects
- No JSON-LD script tag found on the page — returns empty or null result
- URL is blocked by SSRF protection (private IPs, localhost) — returns an error
- URL is unreachable or returns non-200 HTTP status
- HTML input exceeds 200,000 character limit — rejected
- Malformed HTML prevents CSS selector from matching
- URL string shorter than 8 characters or longer than 2048 characters — validation error
- Payment of $0.003 USDC not provided — 402 response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| url | string | Public page to fetch. The selector or profile is fixed by the SKU. Provide url or html. |
| html | string | HTML to extract from locally. Provide html or url. When both are set, html is used. |
Tags
x402
Reviews
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