# SiteCheck Web Intel SEO Audit Tool

> SiteCheck Web Intel SEO Audit Tool is a paid API for AI agents from api.webintel-api.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-25).

Performs an on-page SEO audit of a public web page from its HTML, checking title/description length, H1, canonical link, language, viewport, robots meta, Open Graph tags, alt-text coverage, links, and word count.

## Facts

- Endpoint: GET https://api.webintel-api.workers.dev/api/search/seo-audit-tool?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-25
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sitecheck-web-intel-seo-audit-tool-29d64827
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_-Z-UMq_5-d2645GUysIpV

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 sitecheck-web-intel-seo-audit-tool-29d64827
```

Example prompt: Can you run an on-page SEO audit on https://www.example.com/blog/my-article and tell me if the title, meta description, H1, canonical tag, and Open Graph tags pass, plus flag any images missing alt text?

## When to prefer this

Choose this endpoint when you need a fast, structured on-page SEO check based purely on HTML content — covering the most common technical SEO factors (title, description, H1, canonical, Open Graph, alt text, links, word count). It is not suitable when you need Core Web Vitals, backlink data, keyword volume, or JavaScript-rendered content analysis.

## Known failure modes

- URL is not publicly accessible (private or behind auth) — audit cannot retrieve HTML
- URL points to a non-HTML resource (PDF, image) — no SEO checks applicable
- Invalid or malformed URL supplied — returns error
- Page returns non-200 HTTP status (404, 500, etc.) — no content to audit
- Timeout fetching the page — partial or no results returned

## How this service works

On-page SEO audit of one public page from its HTML only: title and description length, one H1, canonical link, language, viewport, robots meta, Open Graph tags, images without alt text, internal and external links, word count. Returns each check with its value and pass or fail. No Core Web Vitals, backlinks or keyword volumes.

## Output

Returns a structured list of on-page SEO checks, each with its observed value and a pass or fail result. Covers: page title length, meta description length, presence of a single H1, canonical link URL, language attribute, viewport meta tag, robots meta directives, Open Graph tags (og:title, og:description, og:image, etc.), count of images missing alt text, internal link count, external link count, and word count.

## 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",
     "required": [
      "url"
     ],
     "properties": {
      "url": {
       "type": "string",
       "description": "Full http or https address of the page to audit"
      }
     }
    }
   },
   "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/sitecheck-web-intel-seo-audit-tool-29d64827/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.webintel-api.workers.dev](https://www.zero.xyz/host/api.webintel-api.workers.dev/llms.txt)