Documentation

Integrate keyword research into your applications with the SEOLens REST API. Simple, fast, and free to get started.

Quick Start

The SEOLens API provides a single endpoint for keyword research. Send a POST request with your keyword and get back search volume, difficulty, and related suggestions.

POST/api/v1/research

Research a keyword and get search volume, difficulty, CPC, and related suggestions.

Example Request

cURL

curl -X POST https://seolens.dev/api/v1/research \
  -H "Content-Type: application/json" \
  -d '{
    "keyword": "nextjs seo",
    "countryCode": "US",
    "languageCode": "en"
  }'

Example Response

JSON Response

{
  "keyword": "nextjs seo",
  "metrics": {
    "avgMonthlySearches": 2400,
    "competition": "MEDIUM",
    "cpcLow": 0.50,
    "cpcHigh": 2.10
  },
  "difficulty": "medium",
  "suggestions": [
    {
      "keyword": "next js seo optimization",
      "avgMonthlySearches": 880,
      "competition": "LOW",
      "cpcLow": 0.30,
      "cpcHigh": 1.50
    },
    {
      "keyword": "nextjs metadata seo",
      "avgMonthlySearches": 590,
      "competition": "LOW",
      "cpcLow": 0.25,
      "cpcHigh": 1.20
    }
  ]
}

API Reference

Detailed documentation for all endpoints, parameters, and response formats.

Try the Tool

Use the interactive keyword research tool directly in your browser.