POST/v1/seo/keywords

Keyword Research API

Keyword research API with search volume, CPC, difficulty, competition, and 12-month trends. Up to 100 keywords per request from $0.15/call.

Retrieve comprehensive keyword data including monthly search volume, cost-per-click, competition scores, keyword difficulty, and 12-month trend data. One call replaces 3-4 upstream API calls elsewhere.

Full Docs Get API Key — Free $5 Credit $0.15 / call

Try it live

Fill in the fields and hit Run to see a real response.

POST/v1/seo/keywordskeywords$0.15/call

Response

Example response — hit "Send Request" to see a live result

{
  "ok": true,
  "data": [
    {
      "keyword": "nextjs seo",
      "searchVolume": 14500,
      "cpc": 2.54,
      "difficulty": 45,
      "competition": "medium",
      "trend": [
        12100,
        13200,
        14500,
        14800,
        14200,
        13900
      ]
    }
  ]
}

Features

✓Search volume, CPC, difficulty, and competition in a single call

✓Search intent classification (informational, commercial, transactional)

✓12-month trend data with monthly granularity

✓Up to 100 keywords per request

✓Location and language targeting with simple ISO codes

Use cases

SEO Audits

Pull search volume and difficulty for hundreds of keywords at once to prioritize optimization opportunities across your site.

Content Planning

Build data-driven editorial calendars by analyzing keyword demand, CPC value, and seasonal trends before writing.

Programmatic SEO

Feed keyword data into automated page-generation pipelines to create thousands of targeted landing pages at scale.

AI Agent Workflows

Give LLM-based research agents real-time keyword intelligence to make informed decisions about content strategy.

Competitor Gap Analysis

Compare keyword portfolios between domains to find high-value terms your competitors rank for but you don't.

Quick start

Copy this snippet and start making calls.

const res = await fetch('https://api.yepapi.com/v1/seo/keywords', {
  method: 'POST',
  headers: {
    'x-api-key': 'YOUR_API_KEY',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    "keywords": [
      "nextjs seo",
      "vibe coding",
      "headless cms"
    ],
    "location_code": 2840,
    "language": "en"
  }),
});
const data = await res.json();
console.log(data);

What developers say

“Switched from SerpAPI and cut our SERP costs by 80%. Same data quality, way simpler billing.”
Marcus T.
SEO Platform Founder

“One API key for AI models, SERP data, and web scraping. Saved us from managing 4 separate providers.”
Priya S.
Full-Stack Developer

“The $5 free credit let us prototype our entire rank tracking feature before committing. No other API does that.”
Jake R.
Indie Hacker

Frequently asked questions

Each API call costs $0.15. No monthly minimums or subscriptions — you only pay for what you use.

Sign up for a free API key, then send a POST request to /v1/seo/keywords. Check the code example above for a ready-to-use snippet in JavaScript, cURL, or Python.

YepAPI bundles SEO, AI, and web scraping APIs under one key with no monthly minimums. You get lower per-call pricing, a unified dashboard, and one billing account instead of managing multiple providers.

Ready to integrate?

Get your API key and start making calls in 30 seconds. $5 free credit on signup — no credit card required.

Get API Key — Free $5 Credit Read Docs

More seo apis endpoints

Keyword Ideas

$0.02

Generate hundreds of keyword ideas from any seed keyword with volume, CPC, and difficulty scores. Content planning and topic expansion from $0.03/call.

POST /v1/seo/keywords/ideas