# AgentShelf XPath H2 Extractor

> AgentShelf XPath H2 Extractor is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.008/call, status unknown (last checked 2026-10-02).

Extracts the text content of all H2 elements from a public web page URL or provided HTML using XPath, with SSRF protection.

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/xpath-h2?utm_source=zero.xyz
- Price: $0.008/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agentshelf-xpath-h2-extractor-894d05ea
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ZfgJfIOhSL6l0FhwCw9QP

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability agentshelf-xpath-h2-extractor-894d05ea -d '<json body>'
```

Example prompt: Can you pull out all the H2 headings from https://example.com/blog/article so I can see what sections it has?

## When to prefer this

Use this endpoint when you specifically need H2-level headings from a page and want a targeted, low-cost extraction rather than a full heading outline. Prefer the free sandbox variant (/v1/sandbox/xpath-h2) when available. Use the paid endpoint when the sandbox is unavailable or rate-limited. Choose this over a full-heading-outline endpoint when only H2s are needed and you want to minimize cost.

## Known failure modes

- URL is unreachable or returns non-200 status — extraction fails with an error
- URL points to an internal/private IP (SSRF attempt) — blocked by SSRF protection
- HTML or URL exceeds size limits — request rejected
- Page contains no H2 elements — returns empty list
- Malformed HTML input — parser may return partial or empty results
- Payment not included or insufficient — 402 Payment Required

## How this service works

Call when an agent needs text of //h2 via //h2 from a public page or HTML (SSRF-safe). Exact $0.008 USDC. Prefer unpaid POST /v1/sandbox/xpath-h2 first.

## Output

A list of text strings, each representing the inner text of an H2 element found on the page or in the provided HTML, returned in document order and de-duplicated or raw depending on the service's behavior.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "url": {
   "type": "string",
   "maxLength": 2048,
   "minLength": 8,
   "description": "Public page to fetch. The selector or profile is fixed by the SKU. Provide url or html."
  },
  "html": {
   "type": "string",
   "examples": [
    "<!doctype html><html lang=\"en\"><head><title>Hello</title>\n<meta name=\"description\" content=\"Desc\"><meta property=\"og:title\" content=\"OG\">\n<link rel=\"canonical\" href=\"https://example.com/\"><link rel=\"icon\" href=\"/favicon.ico\">\n</head><body><h1>Hello</h1><a href=\"https://example.com/a\">A</a></body></html>"
   ],
   "maxLength": 200000,
   "minLength": 1,
   "description": "HTML to extract from locally. Provide html or url. When both are set, html is used."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agentshelf-xpath-h2-extractor-894d05ea/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentshelf.syntexa.ch](https://www.zero.xyz/host/agentshelf.syntexa.ch/llms.txt)