Head & Meta SEO Audit API

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=

Parameters

Example request

curl "https://api.webbersites.com/api/seo/head-check?url=https%3A%2F%2Fexample.com%2Fpage"
# first call returns 402 + payment requirements; an x402 client pays and retries automatically

Example response

{
    "title": {
        "text": "Example Page",
        "length": 12
    },
    "canonical": {
        "status": "self-referencing"
    },
    "h1_count": 1,
    "problems": [],
    "warnings": [
        "Title is only 12 chars"
    ],
    "verdict": "improvable"
}

How payment works

There is no signup and no API key. Call the endpoint; it replies 402 Payment Required with machine-readable payment requirements. Your client signs a USDC transfer authorization (EIP-3009, gasless) and retries with the X-PAYMENT header — @x402/fetch does this automatically. See the overview for a working snippet.