# Webber Sites Head/Meta SEO Auditor > Webber Sites Head/Meta SEO Auditor is a paid API for AI agents from api.webbersites.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14). Audits the section of any public webpage for on-page SEO fundamentals including title, meta description, robots, canonical, hreflang, OG/Twitter tags, and more ## Facts - Endpoint: GET https://api.webbersites.com/api/seo/head-check - Price: $0.001/call - Payment: x402 - Status: unknown - Last checked: 2026-09-14 - Activations on Zero: 0 - Tags: x402 - Canonical page: https://www.zero.xyz/c/webber-sites-head-meta-seo-auditor-b099f872 - Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_NvBfvfCpFXdWxXlu2JMPM 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 webber-sites-head-meta-seo-auditor-b099f872 ``` Example prompt: Can you run a full head-section SEO audit on https://www.example.com — I want to know if the title and meta description are the right length, whether there's a noindex directive, what the canonical points to, and whether OG and Twitter tags are present? ## When to prefer this Use this endpoint when you need a comprehensive on-page SEO head audit in a single call — covering title, description length, indexability (NOINDEX), canonical, hreflang, OG/Twitter presence, charset, viewport, favicon, H1 count, and lang. Prefer this over individual checks or full-site crawlers when you want fast, cheap ($0.01) per-URL head metadata validation without triggering a broader crawl. ## Known failure modes - Invalid or unreachable URL returns an error - Private/localhost URLs cannot be fetched - Pages with robots.txt blocking fetches may not return accurate results - Very slow servers may cause timeouts - Non-HTML responses (e.g. PDFs) may not be parsed correctly ## How this service works Head/meta SEO audit: title and description with truncation-length warnings, robots meta (flags NOINDEX), canonical status (self-referencing vs pointing elsewhere), hreflang validation, charset, viewport, favicon, H1 count, lang, OG/Twitter presence. The on-page fundamentals in one call. ?url= ## Output Returns a structured audit of the page's with a verdict (pass/fail/warn), title and meta description with truncation-length warnings, robots meta flags (highlighting NOINDEX), canonical status (self-referencing or pointing elsewhere), hreflang validation results, charset, viewport, favicon presence, H1 count, lang attribute, and presence of OG/Twitter tags — plus arrays of problems and warnings. ## Request schema (JSON Schema) ```json { "type": "object", "$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": "Public URL of the page to audit" } } } }, "additionalProperties": false }, "output": { "type": "object", "required": [ "type" ], "properties": { "type": { "type": "string" }, "example": { "type": "object", "properties": { "title": { "type": "object" }, "verdict": { "type": "string" }, "problems": { "type": "array" }, "warnings": { "type": "array" }, "canonical": { "type": "object" } } } } } } } ``` ## Response schema (JSON Schema) ```json { "type": "json", "example": { "title": { "text": "Example Page", "length": 12 }, "verdict": "improvable", "h1_count": 1, "problems": [], "warnings": [ "Title is only 12 chars" ], "canonical": { "status": "self-referencing" } } } ``` ## More - Live health (JSON, refreshed every minute): https://www.zero.xyz/c/webber-sites-head-meta-seo-auditor-b099f872/health.json - [Zero catalog index](https://www.zero.xyz/llms.txt) - [Other services from api.webbersites.com](https://www.zero.xyz/host/api.webbersites.com/llms.txt)