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Heading Outline Extractor (agentshelf.syntexa.ch)
x402
Heading Outline Extractor (agentshelf.syntexa.ch) is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-01).
Extracts an h1–h6 heading outline from a public URL or raw HTML, returning structured heading hierarchy.
Price / call$0.002
Success—
StatusUnknown
How this service works
Call when an agent needs an h1–h6 outline from a public URL or provided HTML. Exact $0.002 USDC. Prefer unpaid POST /v1/sandbox/heading-outline first.
Output
Returns a structured list or outline of all h1–h6 heading elements found in the page or HTML, preserving their level and text content so the caller can see the document's section hierarchy at a glance.
Example use cases
Article structure review before writing
“I'm about to write a response to this article — can you extract all the headings from https://techcrunch.com/2024/05/ai-trends so I can see how it's structured?”
Table of contents generation from raw HTML
“I have this HTML from a documentation page — can you pull out all the h1 through h6 headings to build a table of contents from it?”
SEO heading audit for a client page
“Can you grab the full heading outline from https://myclientsite.com/services so I can check whether the heading hierarchy makes sense for SEO?”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/heading-outline?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a structured h1–h6 outline from a public webpage or HTML blob and want a paid, reliable extraction with a fixed $0.002 USDC cost. Use the free sandbox POST /v1/sandbox/heading-outline first if available. Prefer this over generic scraping tools when only the heading hierarchy (not full page content) is needed.
Side effects
- URL is not publicly accessible or returns a non-200 status — endpoint may return an error or empty outline
- HTML exceeds 200,000 character limit — request rejected
- URL string shorter than 8 characters or malformed — validation error
- Page has no heading elements — returns empty outline
- SSRF-protected: private/internal URLs may be blocked
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| url | string | Public http(s) URL to fetch. When html is also sent, this is only the base for relative links. Provide url or html. |
| html | string | HTML to parse locally instead of fetching. When both html and url are set, html is used. Provide html or url. |
Tags
x402
Reviews
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Zero review prompt (fires after every successful call)
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