Institutional API Overview

Integrate CrossPlag’s institutional-grade AI detection engine directly into your LMS, CMS, or custom workflow. Our RESTful API provides real-time analysis of text for GPT-4o, Claude 3.5, and Gemini signatures.

API Version: 1.2.0 System Status: Operational

Authentication

The CrossPlag API uses API keys to authenticate requests. You can view and manage your API keys in the Developer Dashboard.

Security Note: Your API keys carry many privileges, so be sure to keep them secure! Do not share your secret API keys in publicly accessible areas such as GitHub, client-side code, and so forth.

Pass your API key in the request header:

Authorization: Bearer cp_live_8e92...
// Or use the custom header
X-API-KEY: cp_live_8e92...

POST

/v1/scan

Analyzes a text segment for AI-generated content patterns. Returns probability scores, burstiness metrics, and flagged sentences.

Request Body

Parameter	Type	Description
input_text	string	The text to analyze. Min 50 words, Max 15,000 words.
model_version	string	Optional. Default: ‘latest’. Use ‘v2.5’ for legacy support.
sensitivity	float	Optional. 0.0 to 1.0. Default: 0.5. Adjusts FP threshold.

import requests

url = "https://api.crossplagaidetector.com/v1/scan"

payload = {
    "input_text": "Artificial intelligence creates content by predicting...",
    "sensitivity": 0.8
}

headers = {
    "X-API-KEY": "cp_live_8e92...",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.json())

const axios = require('axios');

const scanText = async () => {
  try {
    const response = await axios.post(
      'https://api.crossplagaidetector.com/v1/scan',
      {
        input_text: 'Artificial intelligence creates content by predicting...',
        sensitivity: 0.8
      },
      {
        headers: { 'X-API-KEY': 'cp_live_8e92...' }
      }
    );
    console.log(response.data);
  } catch (error) {
    console.error(error);
  }
};

scanText();

<?php
$curl = curl_init();

$data = [
    "input_text" => "Artificial intelligence creates content...",
    "sensitivity" => 0.8
];

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.crossplagaidetector.com/v1/scan",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_POST => true,
  CURLOPT_POSTFIELDS => json_encode($data),
  CURLOPT_HTTPHEADER => [
    "X-API-KEY: cp_live_8e92...",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
curl_close($curl);

echo $response;
?>

{
  "id": "scan_123456789",
  "timestamp": "2026-02-10T14:30:00Z",
  "status": "completed",
  "metrics": {
    "ai_score": 0.98,
    "perplexity": 12.4,
    "burstiness": 4.2
  },
  "prediction": "ai_generated",
  "model_detected": "gpt-4o"
}

Rate Limits & Quotas

Plan Tier	Requests / Minute	Monthly Quota	Burst Support
Free Tier	60 req/min	10,000 words
Institutional	5,000 req/min	Unlimited

Request API Access

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