# meta-tag-viewport

> meta-tag-viewport is a paid API for AI agents from site.intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-13).

Checks whether a webpage's viewport meta tag is present, returns its content, length, and flags malformed or placeholder values for SEO and mobile-responsiveness audits.

## Facts

- Endpoint: GET https://site.intel.rallylive.ca/site/meta/viewport?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/meta-tag-viewport-f4656cf5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_yt8XYdTqmTIr17T6GQrYj

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 meta-tag-viewport-f4656cf5
```

Example prompt: Can you check whether example.com has a viewport meta tag set, and let me know if the value looks correct or if something's off?

## When to prefer this

Use this endpoint when you need a quick, focused check of just the viewport meta tag on a specific page — ideal for SEO audits, mobile-readiness checks, or site quality pipelines where you want a single-tag answer without running a full site crawl. Prefer it over general HTML scrapers when you only care about viewport presence and validity.

## Known failure modes

- Page URL is unreachable or returns non-200 status
- Page has no HTML head section to parse
- Tag content is empty — returns presence=true but flags the note
- Value is a placeholder string — flagged in the note field
- Request times out for slow-loading pages

## How this service works

The viewport meta tag of a page: whether it is present and its content (name= or property= form), plus length and a note when the value looks wrong (empty, too long, or a placeholder). One tag, one answer, for SEO and social-preview checks. $0.01 per page.

## Output

Returns whether the viewport meta tag is present on the page, its raw content string, the length of that content, and a note if the value appears malformed (e.g. empty, too long, or a placeholder). Covers both name= and property= tag forms.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/meta-tag-viewport-f4656cf5/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from site.intel.rallylive.ca](https://www.zero.xyz/host/site.intel.rallylive.ca/llms.txt)