Keyword Research APIs

Last Updated on June 15, 2021 by Jake Sheridan

Want to automate and scale manual keyword research tasks? Try using some of these keyword research APIs.

12 Keyword Research APIs to Automate KW Research & Analysis

There’s a reason that every SEO (and their dog) has written a post about keyword research.

It’s because it is important to know what search terms to target and there are lots of different ways to do keyword research.

No matter how you do it, it takes a long time to do it right.

Keyword research involves collecting keyword data, cleaning up this data, analysing it for opportunities, mapping it to content, and making sure it actually fits in your strategy. This can take ages, especially across multiple pages and topics.

This is where leveraging a keyword research API to crunch the data for you can speed things up.

Check out these keyword research APIs (+ documentation):


SEMrush is a robust keyword research API that provides a summary of a keyword, including its volume, CPC, competition, and the number of results in ALL regional databases.

Hook this up to a Google Sheet using Supermetrics and you’ve just automated all the data pulling involved in keyword research.

You can also pull the following data points using the SEMrush API:

  • Keyword Overview
  • Related KWs, Broad Match KWs, Phrase Questions + Difficulty
  • Batch Keyword Overview
  • Organic & Paid Results (+ Ads History)
  • + more

View API Docs


Grepwords is a large database of collected keyword data with no reseller restrictions.

It’s simple APIs can be integrated into almost any system and can provide search volumes at the hyper-local level, historical trends

View API Docs provides API access to get Google search volume data for your keywords and autocomplete data from Google, YouTube, Bing, Amazon, eBay, and Instagram.

You can generate up to 1,120,000 keywords / day from Google and extract this data programmatically, (or with simple scripts or formulas in spreadsheets)..

View API Docs

KW Finder

KW Finder provides a private API to exact search volumes, related keyword suggestions, SEO difficulty scores and other metrics.

It also allows you to process more keywords per one request.

View API Docs


DataForSEO provides a keyword API (Google Ads and Google Trends) for getting keyword data like search volume, impressions, CPC and competition values.

It supports all Google locations, can get keyword suggestions based on domain or URL and can generate new ideas from seed keywords

View API Docs


SpyFu provides an API with a simple description: anything you can see on SpyFu, you can also get via our API.

The API can get keywords for a domain and URL (+ search volumes & CPC), perform competitor URL analysis, do weekly rank tracking and more.

View API Docs


RankRanger provides a keyword research API that can use suggested and related search results to discover keywords.

Using the API, you can retrieve data for your packages, campaigns, keywords, links, profiles, domains and competitors.

View API Docs

SE Ranking

SE Ranking is a handy SEO-related API that allows you to access data gathered from the SE Ranking platform.

Competitor Research API allows you to get competitor and keyword data from both organic and paid search results while SEO data gets the top 100 SERP results from Google and Yandex for your key phrases.

View API Docs


GeoRanker provides a Keywords Data API for getting search volume, CPC, competition and keywords suggestions for any keyword or website.

Data comes directly from Google AdWords API and you can get all the data in real time

View API Docs


Serpstat provides an affordable API for getting an overview of keyword volume, CPC and level of competition.

Hook this up to a Google Sheet using the Serpstat add-on and you’ve just automated keyword research.

You can also pull the following data points using this API:

  • Phrase Match Keywords
  • Keyword overview
  • Keyword search suggestions
  • Related Keywords
  • Top for a keyword
  • Most Popular Phrases

View API Docs

Keyword Discovery

Keyword Discovery is an API that provides access to the biggest keyword database from all the search engines.

You can access search phrases that people use to find products and services, as well as search terms that drive traffic to your competitors.

View API Docs provides an API to find (and organize) a high volume of longtail keywords from many sources along with up to date search volume.

The API can extract autocomplete suggestions from: Google, Amazon, Ebay, Bing, Yandex, Wikipedia, Alibaba, Youtube, Fiverr, Google Play Store and Adobe Fotolia.

View API Docs


Automating keyword research with APIs for marketers

Think I’ve missed a keyword research API? Just let me know and I’ll add it.

Don’t forget to go check out the other Marketing APIs →