Copyleaks API

by api.copyleaks.com

Language and text Added on July 6th, 2015 Checked and working on November 8th, 2026

What it does

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
HTTP-GET
JSON
MCP
REST
Webhooks

At a glance

API key: Needed, free · More APIs with a free key
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

More information: https://api.copyleaks.com/

Is this your service? Show that it is listed

Put this badge on your website or in your README; it links to this page. About the badge

HTML

<a href="https://free-web-services.com/web-services/language/copyleaks.html"><img src="https://free-web-services.com/badge.svg" width="208" height="44" alt="Listed on Free Web Services" /></a>

Markdown

[![Listed on Free Web Services](https://free-web-services.com/badge.svg)](https://free-web-services.com/web-services/language/copyleaks.html)

Example request

curl

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

JavaScript

const response = await fetch("https://api.copyleaks.com/v3/scans/credits", {
  headers: {
    "Authorization": "Bearer YOUR_API_KEY",
  },
});
const data = await response.json();
console.log(data);

Python

import requests

response = requests.get(
    "https://api.copyleaks.com/v3/scans/credits",
    headers={
        "Authorization": "Bearer YOUR_API_KEY",
    },
    timeout=30,
)
print(response.json())

Replace YOUR_API_KEY with your own key.