Ahrefs
Ahrefs SEO and backlink data: query a domain's authority (Domain Rating) and core Site Explorer metrics — organic and paid keywords, organic traffic, and traffic value.
API Sections
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Semrush
Semrush
Semrush competitive SEO intelligence: domain overview, backlinks overview and keyword overview, plus keyword research (difficulty, organic/paid results, broad-match, questions), domain analytics (rank history, organic/paid keywords, competitors, domain-vs-domain), URL keywords and the full backlinks suite — 19 endpoints via the AIsa gateway.

DataForSEO
DataForSEO
Access DataForSEO through AIsa for SERP, keywords, backlinks, merchant, app, business, content, domain, on-page, labs, and AI optimization data. Use the two-level catalog to choose a product area first, then narrow down to the exact API surface.

Similarweb
Similarweb
Similarweb digital intelligence: website traffic & engagement, ranking, traffic sources, audience, website content, keyword/search insights, and managed traffic products — 23 endpoints via the AIsa gateway.