# Copyleaks API

Category: [Language and text](https://free-web-services.com/web-services/language/)  
Page: https://free-web-services.com/web-services/language/copyleaks.html  
Documentation: https://api.copyleaks.com/

Copyleaks detects plagiarism and AI-generated text in more than 100 languages, comparing your text with web pages, scientific papers and its own database of submitted documents. The API lets you submit text, files or URLs for scanning and receive a detailed report with matching sources and highlighted passages through a webhook when the scan is done. Paid plans with a free trial. An official MCP server at https://extensions.copyleaks.com/mcp lets AI agents run scans with a paid account.

- API key: Needed, free
- Pricing: Paid plans with a free trial.
- Formats: JSON
- Interface: REST, HTTP-GET, Webhooks, MCP
- Provider: api.copyleaks.com
- Last checked: Working on November 8th, 2026

Example request:

```sh
curl 'https://api.copyleaks.com/v3/scans/credits' \
  -H 'Authorization: Bearer YOUR_API_KEY'
```

Replace YOUR_API_KEY with your own key.