# CSS Stylesheet Link Extractor

> CSS Stylesheet Link Extractor is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-11).

Extracts stylesheet hrefs from link[rel='stylesheet'] elements in a given public URL or raw HTML string

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/css-link-stylesheet?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/css-stylesheet-link-extractor-3ed7d262
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_BRn8gFvHEKAZHFpHwk0zw

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 css-stylesheet-link-extractor-3ed7d262 -d '<json body>'
```

Example prompt: Can you pull all the CSS stylesheet hrefs from https://example.com — I need a list of every link[rel='stylesheet'] href value on that page.

## When to prefer this

Use this endpoint when you need to enumerate all CSS stylesheets linked in a webpage or HTML fragment, especially in automated pipelines auditing frontend asset loading, performing dependency analysis, or diffing stylesheet configurations across environments. Prefer the free sandbox endpoint (/v1/sandbox/css-link-stylesheet) for development and testing to avoid the $0.002 USDC charge.

## Known failure modes

- URL is unreachable or returns a non-200 status — endpoint may return an error or empty list
- SSRF-blocked URL (private IP ranges, localhost) — rejected for security reasons
- HTML input exceeds 200,000 character limit — request rejected
- No stylesheet link elements present in the page — returns empty list
- Malformed HTML may cause parser to miss some link elements

## How this service works

Call when an agent needs stylesheet hrefs via link[rel='stylesheet'] from a public page or HTML (SSRF-safe). Send JSON fields html (string). Exact $0.002 USDC on Base. Try unpaid POST /v1/sandbox/css-link-stylesheet first.

## Output

Returns a list of href attribute values from all link[rel='stylesheet'] elements found in the provided URL's page or raw HTML. Each entry is a stylesheet URL (absolute or relative) as it appears in the HTML source.

## 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/css-stylesheet-link-extractor-3ed7d262/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)