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AgentShelf H3 Text Extractor
x402
AgentShelf H3 Text Extractor is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-29).
Extracts all H3 heading text from a public webpage URL or raw HTML string, with SSRF protection.
Price / call$0.01
Success—
StatusUnknown
How this service works
Call when an agent needs h3 text extracted from a public page or HTML (SSRF-safe). Exact $0.01 USDC. Prefer unpaid POST /v1/sandbox/profile-h3 first.
Output
Returns a list of H3 heading texts found in the provided URL or HTML. Each extracted heading is returned as a string, giving the agent the full set of H3 section titles present on the page.
Example use cases
Article section outline extraction
“Pull all the H3 headings from https://docs.stripe.com/payments and list them for me — I want to understand how their docs are structured.”
Competitor page structure analysis
“I have the HTML of our competitor's pricing page here — can you extract all the H3 headings from it so I can see how they organize their features?”
SEO heading audit
“Go to https://www.shopify.com/blog/ecommerce-marketing and grab every H3 heading on the page — I need to audit their subheading structure for an SEO comparison.”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/profile-h3?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need specifically H3-level headings extracted from a public webpage or raw HTML string and want SSRF safety guarantees. It is purpose-built for H3 extraction at a low flat cost of $0.01 USDC per call. A free sandbox alternative at POST /v1/sandbox/profile-h3 should be tried first for testing. Prefer this over general-purpose scraping services when only H3 text is needed and budget efficiency matters.
Side effects
- URL is not publicly accessible or returns non-200 status — no content to parse
- SSRF-blocked URL (internal/private IP ranges) — rejected for security reasons
- HTML input exceeds 200,000 character limit — request rejected
- No H3 elements found in page or HTML — returns empty list
- Malformed HTML that cannot be parsed — may return incomplete results
- URL or HTML field both absent — validation error
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
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