# AgentShelf Meta Viewport Extractor

> AgentShelf Meta Viewport Extractor is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.008/call, status unknown (last checked 2026-10-11).

Extracts the meta viewport tag from a public web page URL or raw HTML in an SSRF-safe manner

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/profile-meta-viewport?utm_source=zero.xyz
- Price: $0.008/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agentshelf-meta-viewport-extractor-8544ae36
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_sfWmeGqWZcdHKXImvs3pL

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-meta-viewport-extractor-8544ae36 -d '<json body>'
```

Example prompt: Can you extract the meta viewport tag from https://example.com for me? I need to know what viewport settings that page is using.

## When to prefer this

Use this endpoint when you need to reliably extract meta viewport metadata from a public URL or raw HTML in a secure, SSRF-safe environment. It is preferred when you want a paid, production-grade extraction with guaranteed SSRF protection. Try the free sandbox endpoint POST /v1/sandbox/profile-meta-viewport first if cost is a concern.

## Known failure modes

- URL is inaccessible or returns non-200 status — extraction fails with an error
- Page contains no meta viewport tag — returns empty or null result
- URL is blocked due to SSRF safety rules — request rejected
- HTML input exceeds 200,000 character limit — request rejected
- URL exceeds 2,048 character limit — request rejected
- Malformed HTML prevents parsing — may return partial or no result
- Payment of $0.008 USDC not provided — 402 Payment Required response

## How this service works

Call when an agent needs the meta viewport extracted from a public page or HTML (SSRF-safe). Exact $0.008 USDC. Prefer unpaid POST /v1/sandbox/profile-meta-viewport first.

## Output

Returns the extracted meta viewport tag value from the provided URL or raw HTML, indicating the viewport settings such as width, initial-scale, and other mobile rendering parameters defined on 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-meta-viewport-extractor-8544ae36/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)