# agentshelf.syntexa.ch CSS Aria-Label Extractor

> agentshelf.syntexa.ch CSS Aria-Label Extractor is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.007/call, status unknown (last checked 2026-10-02).

Extracts all aria-label attribute values from a public webpage or raw HTML using CSS selector [aria-label], with SSRF protection.

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/css-aria-label?utm_source=zero.xyz
- Price: $0.007/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-css-aria-label-extractor-da0ca827
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_d6uXqV2w_nkBJ2tet4LBH

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-css-aria-label-extractor-da0ca827 -d '<json body>'
```

Example prompt: Can you pull all the aria-label values from https://example.com so I can audit the page's accessibility labels?

## When to prefer this

Use this endpoint when you need to programmatically extract aria-label accessibility attribute values from either a live public webpage (by URL) or raw HTML. Prefer it over general-purpose scraping tools when the specific goal is accessibility label extraction. Note the description recommends trying the free POST /v1/sandbox/css-aria-label endpoint first before paying $0.007 USDC for this one.

## Known failure modes

- URL is unreachable or returns non-200 status — extraction fails with network error
- SSRF-blocked URL (private IP range, localhost) — rejected for security reasons
- HTML input exceeds 200,000 character limit — request rejected
- No aria-label attributes present in the page — returns empty result set
- Malformed HTML that prevents CSS selector parsing — may return partial or empty results
- URL missing or both url and html omitted — validation error

## How this service works

Call when an agent needs aria-label values via [aria-label] from a public page or HTML (SSRF-safe). Exact $0.007 USDC. Prefer unpaid POST /v1/sandbox/css-aria-label first.

## Output

A list of all aria-label attribute values found in the page or HTML, extracted via the CSS [aria-label] selector. Returns matched values as strings, enabling downstream accessibility auditing or UI analysis.

## 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 charset=\"utf-8\"><meta name=\"description\" content=\"Desc\">\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-css-aria-label-extractor-da0ca827/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)