Link preview and unfurl data: title, description, Open Graph image, site name, canonical URL, favicon and final URL after redirects. Price $0.001 USDC per call via x402. Example output: {"url":"https://github.com/","final_url":"https://github.com/","status":200,"title":"GitHub","description":"Join the world's most widely adopted...","og_image":"https://github.githubassets.com/images/modules/site/social-cards/campaign-social.png","site_name":"GitHub"}