# Vextorium SEO Metadata Extractor

> Vextorium SEO Metadata Extractor is a paid API for AI agents from api.vextorium.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-10-16).

Fetches and analyzes SEO and sharing metadata from a given URL, returning title, description, canonical, robots, Open Graph, Twitter Card, JSON-LD, H1/H2 tags, and SEO warnings.

## Facts

- Endpoint: POST https://api.vextorium.com/metadatos-seo-pago?utm_source=zero.xyz
- Price: $0.004/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/vextorium-seo-metadata-extractor-d6ce1eae
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Bv4gXDUoKSEB8gCHKRL4Z

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 vextorium-seo-metadata-extractor-d6ce1eae -d '<json body>'
```

Example prompt: Can you pull the full SEO metadata for https://example.com — title, description with their character lengths, canonical, robots, Open Graph and Twitter Card tags, H1/H2 headings, JSON-LD types, and any SEO warnings like missing tags or a noindex directive?

## When to prefer this

Choose this endpoint when you need a comprehensive, single-call SEO and social metadata audit of a specific URL — especially if you want title/description length checks, Open Graph, Twitter Card, JSON-LD, hreflang, and structured SEO warnings (noindex, missing tags, multiple H1) all in one response. Ideal for agents performing pre-publish content audits, social sharing verification, or competitive SEO analysis without requiring browser automation.

## Known failure modes

- URL is unreachable or returns a non-200 status — HTTP error code returned in the 'codigo' field
- Target page blocks crawlers — may return empty or partial metadata
- Invalid or malformed URL input — request fails with validation error
- Page loads content via JavaScript only — static metadata may be incomplete
- Timeout on slow or geographically distant pages — partial or null response

## How this service works

SEO and sharing metadata of a page: title and description with length, canonical, robots, language, hreflang, Open Graph, Twitter Card, JSON-LD types, favicon, H1/H2, plus warnings (missing tags, noindex, multiple H1).

## Output

Returns a JSON object with: HTTP status code, final URL after redirects, page language, title and description text with character lengths, canonical URL, robots directive, Open Graph object (url, type, image with dimensions, title, description), Twitter Card object (card type, image), JSON-LD types array, H1 and H2 heading arrays, favicon URL, hreflang array, and an array of SEO warnings (e.g. missing tags, noindex detected, multiple H1 tags).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "url": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "h1": [
   "Data APIs your AI agent pays for per call ."
  ],
  "h2": [
   "Why Vextorium",
   "Services by sector",
   "How it works",
   "Solana",
   "Tokenized stocks, AI agents & markets",
   "Wallets & tokens (EVM)",
   "DeFi & prices",
   "FX & validation",
   "Spain public data",
   "Documents & data",
   "Web & developer tools",
   "Agent payment safety",
   "Calculators & identifiers",
   "Economy & official statistics",
   "FAQ"
  ],
  "avisos": [],
  "codigo": 200,
  "idioma": "en",
  "robots": null,
  "titulo": "Vextorium — The x402 Payment Engine",
  "favicon": "https://vextorium.com/icono.svg",
  "json_ld": [],
  "twitter": {
   "twitter:card": "summary_large_image",
   "twitter:image": "https://vextorium.com/og.png"
  },
  "canonica": "https://vextorium.com/",
  "hreflang": [],
  "url_final": "https://vextorium.com/",
  "open_graph": {
   "og:url": "https://vextorium.com/",
   "og:type": "website",
   "og:image": "https://vextorium.com/og.png",
   "og:title": "Vextorium — The x402 Payment Engine",
   "og:description": "150 pay-per-call data APIs for AI agents. Pay in USDC on Solana or Base with x402. No accounts, no API keys.",
   "og:image:width": "1200",
   "og:image:height": "630"
  },
  "descripcion": "150 pay-per-call data APIs for AI agents: Solana and EVM on-chain data, tokenized stocks, DeFi, FX, validation and AI text tools. Pay in USDC via x402.",
  "titulo_longitud": 35,
  "descripcion_longitud": 151
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/vextorium-seo-metadata-extractor-d6ce1eae/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.vextorium.com](https://www.zero.xyz/host/api.vextorium.com/llms.txt)