# agentshelf.syntexa.ch XPath href Extractor

> agentshelf.syntexa.ch XPath href Extractor is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.009/call, status unknown (last checked 2026-10-02).

Extracts all href attributes from anchor tags on a public webpage or provided HTML using XPath (//a/@href), returning a deduplicated list of links.

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/xpath-a-href?utm_source=zero.xyz
- Price: $0.009/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agentshelf-syntexa-ch-xpath-href-extractor-fcf4bc90
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_RIF0b0Y3HtmDhl8IJre7c

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-syntexa-ch-xpath-href-extractor-fcf4bc90 -d '<json body>'
```

Example prompt: Can you extract all the href links from the anchor tags on https://example.com/blog — I need the raw list of URLs from every <a> tag on that page.

## When to prefer this

Use this endpoint when you specifically need href attributes from anchor tags extracted via XPath from a public page or raw HTML. Prefer this over CSS-selector or full-link extraction endpoints when you want precise XPath-based //a/@href queries. Use the free sandbox POST /v1/sandbox/xpath-a-href first if available; fall back to this paid endpoint at $0.009 USDC when the sandbox is unavailable or rate-limited.

## Known failure modes

- URL is not publicly accessible or returns non-200 status
- HTML content exceeds 200,000 character limit
- URL is blocked for SSRF safety reasons (private/internal IPs)
- Malformed URL input (too short or too long)
- Page has no anchor tags, returning an empty list
- Network timeout when fetching the target URL

## How this service works

Call when an agent needs href attributes of //a via //a/@href from a public page or HTML (SSRF-safe). Exact $0.009 USDC. Prefer unpaid POST /v1/sandbox/xpath-a-href first.

## Output

A list of href attribute values extracted from all anchor tags found in the provided URL or HTML, deduplicated and SSRF-safe, covering both absolute and relative URLs present in the page.

## 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-syntexa-ch-xpath-href-extractor-fcf4bc90/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)