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Vextorium SEO Audit
x402
Vextorium SEO Audit is a paid API for AI agents from api.vextorium.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-10-19).
Fetches and analyzes a URL's on-page SEO signals including title, meta description, headings, Open Graph tags, canonical URL, hreflang, robots, favicon, and structured data.
Price / call$0.004
Success—
StatusUnknown
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
A JSON object containing the page's HTTP status code, final resolved URL, title, title length, meta description, description length, H1 and H2 arrays, canonical URL, robots directives, favicon URL, language, Open Graph properties (url, type, image, title, description, dimensions), Twitter Card properties (card type, image), hreflang tags, JSON-LD structured data blobs, and an array of SEO warnings detected.
Example use cases
Landing page SEO check before launch
“Before we go live, can you audit https://mystartup.com/landing and tell me if the title, meta description, canonical URL, and Open Graph tags all look correct?”
Competitor meta tag research
“Pull the SEO metadata from https://competitor.com — I want to see their page title, description, H1s, and any structured data they're using.”
Diagnosing a social share preview issue
“Our blog post at https://blog.mysite.com/post-123 isn't showing the right image when shared on Twitter — can you check the Twitter Card and Open Graph tags on that page?”
Technical details
Endpoint
POSThttps://api.vextorium.com/v1/seo-audit?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a structured, machine-readable breakdown of a webpage's on-page SEO signals in a single pay-per-call request, without managing API keys or subscriptions. It is ideal for agents automating SEO audits, comparing competitor metadata, verifying social sharing tags, or validating pre-launch pages. Prefer it over general web scraping endpoints when you specifically need normalized SEO fields like canonical, hreflang, Open Graph, and JSON-LD parsed out of the raw HTML.
Side effects
- URL is unreachable or returns a non-200 status — the code field will reflect the HTTP error and other fields may be null
- Invalid or malformed URL provided — likely returns a validation error or empty result
- Page blocks crawlers via robots.txt or firewall — may return null or incomplete metadata
- SSL certificate errors on the target URL may prevent fetching
- Redirect loops or too many redirects may result in an error or partial data
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| url | string |
Output
Schema · Response
{
"type": "json",
"example": {
"h1": [
"Data APIs your AI agent pays for per call ."
],
"h2": [
"Why Vextorium",
"Services by sector"
],
"code": 200,
"title": "Vextorium — The x402 Payment Engine",
"robots": null,
"favicon": "https://vextorium.com/icono.svg",
"json_ld": [],
"twitter": {
"twitter:card": "summary_large_image",
"twitter:image": "https://vextorium.com/og.png"
},
"hreflang": [],
"language": "en",
"warnings": [],
"canonical": "https://vextorium.com/",
"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 Base, Solana or Polygon with x402. No accounts, no API keys.",
"og:image:width": "1200",
"og:image:height": "630"
},
"description": "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.",
"title_length": 35,
"description_length": 151
}
}Tags
x402
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