# AgentShelf XPath Aside Extractor

> AgentShelf XPath Aside Extractor is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.006/call, status unknown (last checked 2026-10-02).

Extracts the text content of all <aside> elements from a public URL or provided HTML using XPath, returning deduplicated sidebar/aside text.

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/xpath-aside?utm_source=zero.xyz
- Price: $0.006/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-aside-extractor-b0652d83
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_LtU7ivuZfuOsATm4xjscD

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-aside-extractor-b0652d83 -d '<json body>'
```

Example prompt: Can you extract all the aside or sidebar text content from https://example.com/article — I want just the text from the <aside> elements on that page.

## When to prefer this

Use this endpoint when you specifically need to isolate <aside> element text from a public web page or raw HTML — for example, to extract sidebar notes, callout boxes, related-content blocks, or supplementary information that is semantically separated from the main body content. Prefer the free sandbox endpoint (/v1/sandbox/xpath-aside) for testing. Choose this over general full-page scrapers when you only want aside/sidebar content and not the full page text.

## Known failure modes

- URL is not publicly accessible or returns non-200 status — endpoint may return an error or empty result
- No <aside> elements found in the page or HTML — returns empty result
- HTML input exceeds 200,000 character limit — request rejected
- URL string shorter than 8 characters or longer than 2048 characters — validation error
- SSRF-protected URLs (private IP ranges, localhost) blocked — returns error
- Malformed HTML may result in incomplete or no extraction

## How this service works

Call when an agent needs text of //aside via //aside from a public page or HTML (SSRF-safe). Exact $0.006 USDC. Prefer unpaid POST /v1/sandbox/xpath-aside first.

## Output

Returns the extracted text content from all <aside> elements found in the target page or HTML, deduplicated and cleaned, allowing agents to isolate supplementary, sidebar, or callout content from the main page body.

## 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-aside-extractor-b0652d83/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)