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Want agent-ready playbooks? Browse workflow templatesBacklink checker
/v1/backlinksSee every page linking to any domain — full referring domain list, anchor text, and link types.
Try it freeDomain authority
/v1/domain-authorityScore any domain by referring-domain count, popularity rank, and registration history.
Try it freeTech stack
/v1/tech-stackDetect server, language, frameworks, and CMS for any website — no Chrome extension required.
Try it freePage speed
/v1/page-performanceRun a Lighthouse audit and pull Core Web Vitals (LCP, CLS, INP) for any URL.
Try it freeSimilar websites
/v1/similar-domainsFind sites with overlapping link profiles — competitor research without the SimilarWeb paywall.
Try it freeDomain age
/v1/domain-authoritySee exactly when any domain was first registered, plus its registrar and popularity rank.
Try it freeMeta tag analyzer
/v1/page-seoInspect title, description, H1, and canonical tag for any URL with length warnings.
Try it freeLink intersect
/v1/link-intersectFind sites linking to your competitor but not to you — the highest-ROI link-prospecting workflow.
Try it free
Browser extension
chrome / edge / firefoxAll of these checks in your browser, plus on-page DOM inspection (link types, meta tags, schema, headings) and SERP overlays. Uses your existing API key.