# AgentShelf XPath Main Content Extractor

> AgentShelf XPath Main Content Extractor is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-02).

Extracts the text content of the main element (//main) from a public web page or provided HTML using XPath, with SSRF protection.

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/xpath-main?utm_source=zero.xyz
- Price: $0.005/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-main-content-extractor-b260b29e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_7WmgS0bs6dYjOJSXqSgGD

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-main-content-extractor-b260b29e -d '<json body>'
```

Example prompt: Can you grab the main content text from https://example.com/blog/article — just the text inside the <main> element?

## When to prefer this

Choose this endpoint when you specifically need the text content of the semantic <main> HTML element from a page, rather than a full markdown conversion or all link/href attributes. It is ideal when you want structured XPath-based extraction that is predictable and SSRF-safe, and when you have either a public URL or a raw HTML string to parse. Prefer the free sandbox POST /v1/sandbox/xpath-main first to test; use this paid endpoint for production use.

## Known failure modes

- No //main element found in the HTML — returns empty or null result
- URL is unreachable or returns non-200 status — fetch error
- SSRF-blocked URL (private IP range, localhost) — rejected for safety
- HTML input exceeds 200,000 character limit — validation error
- URL shorter than 8 characters or longer than 2048 characters — validation error
- Payment of $0.005 USDC not provided — 402 Payment Required

## How this service works

Call when an agent needs text of //main via //main from a public page or HTML (SSRF-safe). Exact $0.005 USDC. Prefer unpaid POST /v1/sandbox/xpath-main first.

## Output

Returns the extracted text content of the //main element found on the target page or within the provided HTML. If the page was fetched via URL, the response reflects the final resolved URL after any redirects.

## 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-main-content-extractor-b260b29e/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)