Buyer research · Sep 24, 2026
Best SEO data APIs: what our evidence supports
SEO data APIs expose different datasets and proprietary metrics. We do not average unlike metrics into a universal score.
DataForSEO
Official documentation supports SERP, Keywords Data and AI Optimization API families. Search Data Bench has not yet executed the SDB-B01 comparable workload, so performance and comparable cost remain unresolved.
SE Ranking API
Our prior frozen hands-on run produced keyword data for 23 of 25 submitted keywords, six ten-row SERPs, rank rows for 24 of 25 tracked keywords, and completed four competitive-domain and four backlink checks. These are dated observations, not guarantees for every plan or later run.
Mangools API
Mangools publishes API documentation and an AI Search Watcher API. Our authenticated API entitlement is unresolved; prior hands-on evidence covers the product interfaces. No affiliate link is published until its exact destination is verified.