# Pa1m SEO – HTML Check (Core SEO Category)

> Pa1m SEO – HTML Check (Core SEO Category) is a paid API for AI agents from seo.hypa1m.xyz, paid per call via x402, $0.15/call, status unknown (last checked 2026-09-14).

Instantly audits a URL's HTML for core SEO issues, returning a scored result for the core-seo category

## Facts

- Endpoint: GET https://seo.hypa1m.xyz/check/html
- Price: $0.15/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/pa1m-seo-html-check-core-seo-category-64e2bc77
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_TuQDH8qJEanYtuXNQ3i7J

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 pa1m-seo-html-check-core-seo-category-64e2bc77
```

Example prompt: Can you run an instant core SEO check on https://www.myshop.com and tell me what HTML issues it finds, like missing meta descriptions or broken heading structure?

## When to prefer this

Use this endpoint when you need an instant, single-category core SEO HTML check without waiting for a full async scan job. It is ideal for quick spot-checks on individual URLs, pre-publish validation, or when you only need core on-page SEO signals (title, meta, headings) rather than a comprehensive 20-category audit. Choose the async /scan/full or /scan/quick flow instead when you need all 200 rules and per-category scoring across technical health, Core Web Vitals, accessibility, security headers, and more.

## Known failure modes

- URL not reachable or returns non-200 status — audit may fail or return empty results
- Malformed or missing 'url' query parameter — request rejected
- Paywalled or login-protected pages — HTML content may be incomplete, skewing results
- Very large or JavaScript-heavy pages — static HTML check may miss dynamically rendered content
- Rate limiting or payment failure (x402) — request blocked

## How this service works

SEO audit any website — 200 rules across 20 categories: technical health, Core Web Vitals, content quality, AI-GEO signals, accessibility, security headers, structured data, and more. Async job flow: POST /scan/quick or /scan/full → poll GET /status/{job_id} → get JSON result with per-category scores (0–100) and issue lists. Use /brief for an AI action plan, /analyze for free-form SEO questions, or /check/{category} for instant single-category audits.

## Output

Returns a JSON object with a 'category' field set to 'core-seo' and a 'result' object containing the per-category score (0–100) and a list of detected SEO issues in the HTML, such as missing or duplicate title tags, absent meta descriptions, improper heading hierarchy, or other core on-page SEO signals.

## 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",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "url"
     ],
     "properties": {
      "url": {
       "type": "string",
       "description": "Page or site URL to audit"
      }
     }
    }
   },
   "additionalProperties": false
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "result": {},
  "category": "html"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/pa1m-seo-html-check-core-seo-category-64e2bc77/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from seo.hypa1m.xyz](https://www.zero.xyz/host/seo.hypa1m.xyz/llms.txt)