# TheSEOLabs API

TheSEOLabs provides keyword research APIs for SEO professionals and developers.
Two endpoints are available: a static English keyword database with over 1 billion entries,
and a live multilingual keyword suggestions API with search volume, CPC, and category data.

## Authentication

All endpoints require a Bearer token in the Authorization header:

  Authorization: Bearer YOUR_API_KEY

Get your API key (free): https://www.theseolabs.com/app/register/

## APIs

- Keyword Database API: https://www.theseolabs.com/app/documentation/keyword-database/index.md
- Live Keyword Suggestions API: https://www.theseolabs.com/app/documentation/keyword-suggestions/index.md

## Quick comparison

| Feature            | Keyword Database         | Live Keyword Suggestions  |
|--------------------|--------------------------|---------------------------|
| Data               | Static (pre-indexed)     | Live (scraped real-time)  |
| Languages          | English only             | 100+ languages            |
| Results per call   | Up to 300                | Up to 6,000+              |
| Rate limit         | 500 req/day              | 100 req/day               |
| Response time      | < 100ms                  | 5–15s                     |
| CPC filter         | Yes                      | No                        |
| Volume filter      | Yes                      | No                        |
| Categories         | No                       | Yes (Google Ads)          |

## Notes

- Rate limits are rolling 24-hour windows, not midnight resets.
- Limits are per API key (per account).
- HTTP 429 is returned when the daily limit is exceeded.
- All responses are Content-Type: application/json.
- CPC values are always in USD.