DataForSEO

DataForSEO API designed for SEO-software companies and agencies. With DataForSEO you can build SEO-software of your dream: from simple rank tracking solution to enterprise-level SEO platform. Our main products are SERP API, Keywords Data API, and DataForSEO Labs API.
DataForSEO provides such data as search volume, CPC, rankings, Top 100 results from search engines (Google, Bing, Yahoo, Yandex), keywords suggestions, on-page data and more.
You’ll find everything you need for your SEO-software!