# CSS/HTML Web Manifest Link Extractor

> CSS/HTML Web Manifest Link Extractor is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.006/call, status unknown (last checked 2026-10-19).

Extracts web manifest hrefs from link[rel='manifest'] elements in a public page or raw HTML, with SSRF protection.

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/css-manifest?utm_source=zero.xyz
- Price: $0.006/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-19
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/css-html-web-manifest-link-extractor-0c4ed1b7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_C3sGuHCjxFTzub0WZXybQ

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-html-web-manifest-link-extractor-0c4ed1b7 -d '<json body>'
```

Example prompt: Can you grab the web manifest href from https://example.com — specifically whatever is in the link[rel='manifest'] tag on that page?

## When to prefer this

Use this endpoint when you need to programmatically discover a website's PWA/web app manifest location from either a live URL or raw HTML. Prefer the unpaid POST /v1/sandbox/css-manifest endpoint if available for free usage. Choose this paid endpoint when the sandbox is unavailable or quota is exhausted and you need reliable SSRF-safe manifest extraction.

## Known failure modes

- No link[rel='manifest'] found in the page or HTML (returns empty or null result)
- URL is unreachable or returns a non-200 response
- SSRF protection blocks internal/private IP ranges
- HTML input exceeds 200,000 character limit
- URL exceeds 2,048 character limit or is malformed
- Neither url nor html parameter provided

## How this service works

Call when an agent needs web manifest hrefs via link[rel='manifest'] from a public page or HTML (SSRF-safe). Exact $0.006 USDC. Prefer unpaid POST /v1/sandbox/css-manifest first.

## Output

Returns the href value(s) found in link[rel='manifest'] elements within the specified page or HTML content, indicating where the site's web app manifest is located.

## 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-html-web-manifest-link-extractor-0c4ed1b7/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)