# AgentShelf CSS Link Icon Extractor

> AgentShelf CSS Link Icon Extractor is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-01).

Extracts favicon/icon hrefs from link[rel='icon'] elements in a public webpage or provided HTML content, with SSRF protection.

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/css-link-icon?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-01
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agentshelf-css-link-icon-extractor-9769619e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_XV7qNJuCCu4UzNhhgDlCV

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-css-link-icon-extractor-9769619e -d '<json body>'
```

Example prompt: Can you get the favicon icon href from https://example.com by extracting the link[rel='icon'] element from that page?

## When to prefer this

Use this endpoint when you need to programmatically extract a site's favicon or icon URL from either a live public page or a known HTML string, without implementing your own HTML parser. It is SSRF-safe, making it suitable for agent pipelines that fetch arbitrary user-supplied URLs. Prefer the free sandbox version (/v1/sandbox/css-link-icon) first if available; use this paid endpoint when the sandbox is unavailable or rate-limited.

## Known failure modes

- URL not reachable or returns non-200 status — no icon href returned
- No link[rel='icon'] element present in the HTML — empty result
- SSRF-blocked URL (private IP ranges, localhost) — request rejected
- HTML input exceeds 200,000 character limit — request rejected
- URL longer than 2048 characters — validation error
- Malformed HTML with no parseable head section — no results

## How this service works

Call when an agent needs icon hrefs via link[rel='icon'] from a public page or HTML (SSRF-safe). Exact $0.003 USDC. Prefer unpaid POST /v1/sandbox/css-link-icon first.

## Output

Returns the href value(s) from link[rel='icon'] elements found in the fetched page or provided HTML. Typically a URL path or data URI pointing to the site's favicon or icon file.

## 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-css-link-icon-extractor-9769619e/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)