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PageCheck HTML Audit API
x402
PageCheck HTML Audit API is a paid API for AI agents from pagecheck-api-production.up.railway.app, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-19).
Audits supplied HTML for SEO metadata, accessibility, indexability, social tags, and structured data validity, returning evidence and actionable fixes
Price / call$0.05
Success—
StatusUnknown
How this service works
Audit supplied HTML for metadata, canonical URLs, indexability directives, headings, image alternatives, form labels, link names, social metadata and JSON-LD validity. Returns evidence and practical fixes. Static checks are not a full WCAG certification or ranking guarantee.
Output
Returns a structured audit report covering: metadata completeness (title, description), canonical URL status, indexability directives (robots meta, X-Robots-Tag), heading hierarchy analysis, image alt text gaps, form label issues, link name accessibility, Open Graph and Twitter social metadata, and JSON-LD validity — each with supporting evidence and specific remediation recommendations.
Example use cases
Pre-publish SEO health check
“Before I publish this blog post, audit the HTML for me — check the title tag, meta description, heading structure, canonical URL, and whether search engines will actually index it. Here's the full HTML of the article page.”
Accessibility compliance scan
“Run an accessibility audit on this page's HTML — I need to know about any missing image alt text, unlabeled form fields, and link names that aren't descriptive enough. Here's the HTML.”
Structured data and social metadata validation
“Can you check my product page HTML for valid JSON-LD structured data and make sure the Open Graph and Twitter card tags are all set up correctly? Flag anything that's broken or missing.”
Technical details
Endpoint
POSThttps://pagecheck-api-production.up.railway.app/v1/pages/audit?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a fast, programmatic, per-page HTML audit covering SEO fundamentals (metadata, canonicalization, indexability), basic accessibility signals (alt text, form labels, link names), and structured data validity in a single call. It is ideal for CI/CD pipelines, content management workflows, or agent-driven pre-publish checks where you have raw HTML available. It is not a substitute for a full WCAG certification tool, a live crawler, or a ranking-factor analysis platform.
Side effects
- HTML too large (exceeds 250,000 character limit) — request rejected
- Malformed or empty HTML — audit may return incomplete or erroneous findings
- Invalid URI format for URL field — validation error returned
- Network or service unavailability on Railway hosting — 5xx errors possible
- Payment failure via x402 protocol — request not processed
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| url | string | |
| html | string | |
| target_keyword | string |
Tags
x402
Reviews
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Zero review prompt (fires after every successful call)
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