Plagiarism Checker API

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Explore the Copyleaks
Plagiarism Checker API

Level up your business’ content development strategy with seamless Copyleaks API integration that’s fully white-labeled under your brand so you can customize the look and feel to fit the needs of your business.


Plus, go beyond word-for-word plagiarism detection with a platform that can detect AI-generated text, multiple forms of paraphrasing, source code plagiarism, and image-based text plagiarism. With every scan, you get a secure, customized, detailed Similarity Report that you can share with your team.

Developed for Developers

The Copyleaks plagiarism checker software can be embedded in your custom application using our Software Development Kits, available in various languages. Our SDKs allow developers to easily integrate the Copyleaks API into any platform in just a few minutes, using our ready-to-use code in different languages, including C#, Node.JS, PHP, Java, Ruby, and Python.

Three API Integrations Options All Tailor Made For You

Branded PDF Report

Receive a PDF report summarizing the scan results.

  • Quick integration
  • Easy to configure results
  • Utilizes the least development resources
  • Clear and concise PDF final report
This option is for you if:
  • You don’t require customization
  • Don’t need raw data for processing
  • Are looking for a quicker integration

Fully Interactive Report

Embed an interactive Copyleaks report within your own interface. 

  • Easily embed anywhere
  • Completely interactive to understand the results
  • Minimal development time
  • Get detailed sources for every result
This option is for you if:
  • You require minimal customization
  • Need only basic changes to the look and feel
  • Want more detailed sources for results
  • Need to preserve development resources expenditure

Deep Customization

Our most powerful reporting method.

  • All raw data from scan results are available for use
  • Fully white-label reports and data to meet your requirements
  • No additional cost
  • Offers the best usage of scan reports/data
This option is for you if:
  • You want raw data for further use
  • You require deep integration and/or customization
  • You wish to fully white label
  • Need data for case-specific UI/UX

See how the Plagiarism Checker API can work for you today.

What You're Getting

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AI Generated Content

As part of your API integration, you can add a new level of content verification for your business with AI-generated content detection. There’s no need to leave it to chance; check all your content for originality and to know who wrote it.


Results Beyond Word-for-Word Plagiarism Detection

The only platform that:

  • Detects multiple forms of paraphrasing
  • Performs image-based text plagiarism thanks to OCR technology
  • Detects source code plagiarism
Search Magnifying Glass

Search Results

Easily detect content duplication and paraphrasing with trillions of pages of original content at your fingertips, along with:

  • 16,000+ open-access journals
  • 60 trillion websites
  • 1M+ internal documents
  • 20+ code data repositories


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API Integration Support
For Whatever You Require

Choose the best option for you from our three comprehensive integration support plans and have your API up and running in no time.

Customizable blocks


Tailor our API integration to meet your needs; choose the look and overall feel, and decide how it is positioned within your platform.

Cloud Storage

Secure Storage Options
for Internal Content

Have complete control over your data and internal documents with a Private Repository. Grant team members access and allow them to compare their content against any internal document to ensure originality.



Our API dashboard allows for detailed analytics, including usage data and quota availability.

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Plagiarism Detection in
Over 100 Languages

With one of the most extensive language databases available, easily scan and detect potential plagiarism in over 100 languages.


Security and Privacy

You are fully protected with a cloud-based system architecture, military-grade 256-bit encryption with SSL connection, and 100% data transferred using secure channels (HTTPS).

Data masking

Data Masking

Rest easy knowing you and your organization’s sensitive information is protected. Our API automatically masks credit card numbers, addresses, and other sensitive data.

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Do More With
Your Organization

With the Copyleaks Admin, you can create and manage policies,  assign multiple admins, easily share reports and other files with specific departments or the entire organization, and more. 

Ready to get started with the Copyleaks Plagiarism Checker API?


Explore our options and get started with the plan that works for you.


Why wait? Dive into our API dashboard and get familiar with the platform today.


Find all documentation you need including SDKs with code examples, methods documentation, technical specifications, and more.

Why Copyleaks?

We are the only solution that can detect paraphrasing in multiple forms.

We are the only platform that can detect plagiarism in source code.

We’re the only platform that can detect image-based text plagiarism using OCR technology.

Copyleaks is the only platform that can expose attempts to deceive detection software.

Copyleaks is the only platform that assigns a dedicated Customer Success Team to help you every step of the way.

Our clients love us; we have a 97+% renewal rate.

Plagiarism Detection Designed to Fit Your Needs

Copyleaks API Plagiarism Detection allows you to customize the integration to your platform precisely as needed.

Book a free demo with one of our representatives to see our API integration in action and get answers to any questions you might have about API and other Copyleaks products.