OpenWeb Ninja's answer:
Aves API - Aves API is the insanely fast SERP API that enables you to scrape Google search results without blocking.
SerpClix - SerpClix is a click exchange network used to send more real clicks to your Google SERP. You can click to earn money or buy clicks to rank higher on Google.
SerpApi - Scrape Google search results from our fast, easy, and complete API.
Outscraper - Scrape Google Maps Places, Business Reviews, Photos, Play Market Reviews, and more. Get any public data from the internet by applying cutting-edge technologies. Web Tools & API's.
DataForSEO - DataForSEO offers API data for SEO companies that deliver results of tasks for Rank tracking, SERP, Keyword data and On-page APIs.
SEMRush - All-in-one Marketing Toolkit for digital marketing professionals.