# SEO Audit - On-Page Technical SEO Analysis

> SEO Audit - On-Page Technical SEO Analysis is a paid API for AI agents from payai.agentstools.dev, paid per call via x402, $0.03/call, status unknown (last checked 2026-10-11).

Runs a deterministic 24-rule mechanical on-page SEO audit of a single web page, returning a 0-100 score, letter grade, per-rule pass/warn/fail checklist with evidence and fixes, and an indexability-critical flag.

## Facts

- Endpoint: GET https://payai.agentstools.dev/seo/audit?utm_source=zero.xyz
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/seo-audit-on-page-technical-seo-analysis-2134ae80
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_5TyB40W3UulovTQCw9tyt

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 seo-audit-on-page-technical-seo-analysis-2134ae80
```

Example prompt: Can you run a full technical SEO audit on https://example.com/pricing and tell me the score, grade, and any critical indexability issues or failing rules I should fix?

## When to prefer this

Choose this endpoint when you need a fast, deterministic, rule-based technical SEO audit of a single page without requiring API keys or LLM interpretation. Ideal for checking indexability, canonical issues, meta tags, structured data presence, and mobile/encoding signals. Prefer this over content-quality or ranking tools when you need mechanical markup verification with specific evidence and actionable fixes per rule.

## Known failure modes

- Page URL is unreachable or returns a network error — audit cannot complete
- Page returns a non-200 status and redirect chain cannot be followed — partial or failed result
- Malformed URL input causes a validation error
- Page takes too long to load — timeout error
- URL points to a non-HTML resource (PDF, image) — rules may not apply

## How this service works

Deterministic on-page technical-SEO audit of a single web page. Fetches the page (redirects + response headers) and runs 24 mechanical rules across six categories (indexability, title/meta, headings, structured data, images, i18n/mobile). Returns a 0-100 score, letter grade, per-rule pass/warn/fail checklist with fixes, and an indexability-critical flag. No LLM, no keys.

## Output

Returns a JSON object with a 0-100 overall SEO score, a letter grade (A–F), an indexability-critical boolean flag (true if the page cannot rank due to noindex, robots block, or non-self canonical), and a checklist of 24 rules across six categories (indexability/crawl, title/meta, headings/content, structured data/social, images, i18n/mobile/encoding) — each with pass/warn/fail status, supporting evidence extracted from the page, and a concrete fix recommendation.

## 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": [],
     "properties": {
      "url": {
       "type": "string",
       "description": "Target page URL to audit, path preserved (e.g. https://example.com/pricing)"
      },
      "host": {
       "type": "string",
       "description": "Alternative input: a hostname"
      },
      "domain": {
       "type": "string",
       "description": "Alternative input: a bare domain, audits its homepage (e.g. example.com)"
      }
     }
    }
   },
   "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/seo-audit-on-page-technical-seo-analysis-2134ae80/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from payai.agentstools.dev](https://www.zero.xyz/host/payai.agentstools.dev/llms.txt)