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x402 Site Audit API
x402
x402 Site Audit API is a paid API for AI agents from agentkit-x402.zenith-ops.workers.dev, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-29).
Audits a webpage URL for SEO, security headers, metadata, indexability, and technical site health metrics
Price / call$0.02
Success—
StatusUnknown
How this service works
Pay-per-call API for AI agents with no signup or API key. Email validation, SPF/DMARC audits, DNS lookup, site contacts, URL to Markdown, IBAN and Swedish personnummer/orgnr validation. From $0.001 in USDC on Base via x402.
Output
Returns a JSON object with SEO score (0-100), page title and length, meta description, H1/H2 headings and counts, canonical URL, final URL after redirects, redirect chain, HTTPS status, indexability flag, noindex source, robots meta, viewport, hreflang tags, open graph tags, Twitter card data, JSON-LD types, microdata flag, word count, link counts (internal/external/nofollow), image counts and missing alt text, detected technologies, security headers (CSP, HSTS, X-Frame-Options, X-Content-Type-Options, Referrer-Policy, Permissions-Policy, COOP), and a list of issues with severity levels.
Example use cases
Pre-launch landing page SEO check
“Before we go live, audit https://acme.com/new-product for SEO issues — tell me the score, whether the title and meta description are set, if the page is indexable, and flag any missing alt text on images.”
Competitor technical SEO analysis
“Run a site audit on https://competitor.com/pricing so I can see their SEO score, heading structure, open graph tags, canonical URL, and what security headers they have in place.”
Security header compliance review
“Check https://app.mycompany.com/login for security header issues — specifically tell me if it has HSTS, Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options set correctly.”
Technical details
Endpoint
GEThttps://agentkit-x402.zenith-ops.workers.dev/v1/site-audit?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a fast, no-signup, pay-per-call SEO and security audit of a specific URL without subscribing to a full SEO platform. Ideal for AI agents that need programmatic access to page metadata, security headers, indexability, and structured data on-demand. Best for single-page spot checks rather than full-site crawls. The x402 micropayment model ($0.02 USDC per call) makes it cost-effective for low-volume or ad-hoc audits.
Side effects
- URL is unreachable or returns non-200 status — returns actual HTTP status in response with partial data
- Invalid or malformed URL — likely returns error or empty result
- Page behind authentication — only publicly accessible content is audited
- Timeout on slow pages — may return incomplete data
- JavaScript-rendered content may not be fully captured by the crawler
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"h1": [
"Example Domain"
],
"url": "https://example.com/",
"lang": "en",
"https": true,
"links": {
"external": 1,
"internal": 0,
"nofollow": 0
},
"score": 94,
"title": "Example Domain",
"images": {
"total": 0,
"missing_alt": 0
},
"issues": [
{
"code": "missing_meta_description",
"message": "No meta description.",
"severity": "warning"
}
],
"status": 200,
"h1_count": 1,
"h2_count": 0,
"hreflang": [],
"viewport": "width=device-width, initial-scale=1",
"canonical": null,
"final_url": "https://example.com/",
"indexable": true,
"microdata": false,
"open_graph": {},
"word_count": 28,
"robots_meta": null,
"technologies": [],
"title_length": 14,
"twitter_card": {},
"json_ld_types": [],
"noindex_source": null,
"redirect_chain": [],
"meta_description": null,
"security_headers": {
"referrer_policy": null,
"x_frame_options": null,
"permissions_policy": false,
"x_content_type_options": null,
"content_security_policy": false,
"strict_transport_security": null,
"cross_origin_opener_policy": null
},
"canonical_is_self": null,
"meta_description_length": 0
}
}Tags
x402
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