USEFUL APIS FOR AI AGENTS

Pagecheck

Find SEO and static accessibility issues.

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.

0.05 USDCBase mainnetx402 v2

Make this part of your workflow.

One fixed example is free. Custom work uses a clear input contract and releases the result after payment settles.

Make a custom request · 0.05 USDC ↗Fixed free example ↗Interactive API reference ↗OpenAPI contract ↗Agent instructions ↗

One copyable request.

POST /v1/pages/audit

{
  "url": "https://example.com/products/notebook",
  "target_keyword": "notebook",
  "html": "<!doctype html><html><head><title>Notebook</title></head><body><h1>Notebook</h1><h3>Features</h3><img src=\"notebook.jpg\"><form><input id=\"email\" type=\"email\"><button></button></form><a href=\"/buy\"></a><p>A durable notebook for everyday planning.</p></body></html>"
}

Send the JSON to the operation above. An x402-capable client receives the payment challenge, authorizes exactly 0.05 USDC, and retries with PAYMENT-SIGNATURE.

Keep the result.

Prioritized findings + evidence + fixes

Files arrive in a JSON artifact envelope with base64 bytes, filename, MIME type, size and SHA-256. Decode the bytes to save the file. Diagnostic results arrive as structured JSON.

The same proof and normalized input retrieves the exact paid result for 30 minutes across restarts. A proof cannot unlock another request. Never create another authorization automatically after ambiguous delivery.