July 1, 2026 New
AI Image Detection Upgrade This version improves overall accuracy, particularly for image-editing use cases where AI-generated features are blended into standard images. We’ve sharpened our detection algorithms to better localize intricate details and specific subjects across varying image qualities. As always, this release ensures excellent, continuous compatibility with state-of-the-art, recently-released models.July 1, 2026 New
Image Plagiarism Detection API Launch The new Image Plagiarism Detection API is now available. Submit an image and receive a categorized list of web matches - full matches (exact copies) and partial matches (modified versions), each with the web pages where the image was found — in a single synchronous call. See the Image Plagiarism Detection guide to get started, or jump to the API reference.June 22, 2026 New
Higher Character Limit for AI Detection The synchronous AI Detection endpoint now accepts up to 100,000 characters per request, raised from the previous 25,000 character limit. Submit larger text passages in a single call without splitting them. See the AI Text Detector reference.June 17, 2026 New
AI Image Detection Async Endpoint A new asynchronous endpoint joins the AI Image Detection API. Submit an image URL and receive results via webhook when processing is complete useful when you want a fire-and-forget submission instead of holding the connection open for the synchronous response. Highlights:POST /v1/ai-image-detector-async/{scanId}/submitaccepts an image URL and a webhook config- Optional
maskType: "heatmap"returns a pixel-level overlay of AI-generated regions - Same
ai-image-1-ultramodel and webhook payload shape as the synchronous endpoint - Custom
headersfor both the inbound image fetch and the outbound webhook call
May 31, 2026 New
AI Video Detection API Launch We’re launching the AI Video Detection API, which detects whether a video was generated or partially generated by AI. Key features:- Audio & visual track analysis - independently analyzes both tracks, returning time-based detection data (start positions and durations in milliseconds) for each
- Overall AI ratio - a single
overallAIRatioscore representing the proportion of the video that is AI-generated, combining both audio and visual detections - Metadata extraction - pulls embedded provenance metadata (C2PA standard) to identify the generating tool and creation timestamp when available
- Broad format support -
.mp4,.avi,.mov,.mkv,.webm,.flv,.wmv,.mpg,.m4v,.3gp,.mxf, up to 0.5 GB and 1 hour - Async webhook delivery - submit a video URL and receive results via webhook when processing completes
February 22, 2026 New
Multipart Support for AI Image Detection The AI Image Detection API now supportsmultipart/form-data (recommended) for submitting images as binary files. JSON with base64 encoding remains available but is less recommended for production use. See Best Practices for Working with Images for optimization tips.
February 1, 2026 New
AI Image Detection Upgrade Enhanced capability by improving accuracy, adding supported models, smartphone features (iPhone smart magic eraser and Samsung GenAI editing). The new version offers accuracy level improvements on social media, small, low-quality, and professionally filtered images. It also provides excellent support for the top-of-the-class models.December 16, 2025 Removal
AI Code Detection Deprecated in Submit Endpoints Following the deprecation of the standalone AI Code Detection endpoint in August, we are now deprecating AI code detection capabilities from the all endpoints. Theproperties.aiGeneratedText feature will no longer support source code files.
The following property is deprecated in:
PUT https://api.copyleaks.com/v3/scans/submit/file/{scanid}PUT https://api.copyleaks.com/v3/scans/submit/url/{scanid}PUT https://api.copyleaks.com/v3/scans/submit-ocr/url/{scanid}
This change only affects AI detection for programming languages and source code. AI Content Detection for natural language text continues to be fully supported.
December 3, 2025 New
Enhanced Scan Exclusion Options Added new fields to theproperties.scanning.exclude object in Submit Endpoints:
properties.scanning.exclude.backlinksDomains- Exclude results that contain backlinks to these specific domains. Provide an array of domain names to filter out from internet plagiarism results.properties.scanning.exclude.text- Exclude any results that contain text matching these phrases. Provide an array of text strings to ignore during scanning.
August 31, 2025 New
AI Image Detection API Launch The new AI Image Detection API is now available, enabling you to detect whether an image is AI-generated or partially AI-generated. Key Features:- Pixel-level analysis - Get detailed masks showing which parts of an image are AI-generated vs. human-created
- Metadata extraction - Automatically extract AI generation metadata when available (issuer, creation time, tool used)
- Comprehensive results - Receive percentage breakdowns of AI vs. human content, plus detailed RLE-encoded mask data
- Flexible image support - Process PNG, JPG, JPEG, BMP, WebP, and HEIC/HEIF formats up to 27 megapixels
August 28, 2025 Deprecated
Standalone AI Code Detection Endpoint Deprecated The standalone AI Code Detection endpoint for source code has been deprecated and will be removed in a future release. This is a dedicated endpoint specifically for detecting AI-generated source code across multiple programming languages. Deprecated endpoint:POST https://api.copyleaks.com/v2/writer-detector/source-code/{scanId}/check
Alternative: For natural language text, use the standard AI Content Detection API.
August 18, 2025 New
Timezone Customization for PDF Reports You can now control the timezone of the scan time displayed on PDF reports by using a new field in your scan submissions.properties.scanTimeZone - Specifies the desired IANA Time Zone (e.g., ‘America/New_York’) for the report’s scan time. If this property is not set, the timezone will default to the user’s country. If the country is unknown, UTC will be used.
July 08, 2025 New
Text Moderation API Launch The new Text Moderation API is now available, designed to help you maintain safe and appropriate content across your platform. Key Features:- Real-time content analysis - Get instant results for submitted text
- 10+ moderation categories - Detect hate speech, toxic language, adult content, violence, self-harm, cybersecurity threats, and more
- Precise flagging - Receive exact character positions for each flagged segment
- Simple integration - RESTful API that fits seamlessly into any content workflow
May 15, 2025 New
PDF Report Version Management A new field has been added for scan submissions:properties.pdf.reportVersion- Specifies which version of the PDF report to generate. This string-based property overrides the legacyversion(integer) property if both are provided. It also allows you to select the latest stable version of the PDF report by using"latest".
reportVersion nor version is set:
- New users (created after 2025-05-15) receive v3 by default
- Existing users receive v1 by default
May 14, 2025 New
AI Source Match Feature Launch In an evolving digital landscape, understanding the origin and nature of content is more crucial than ever. AI Source Match revolutionizes our plagiarism and AI detection capabilities by identifying online sources that are suspected to be AI-generated. Key Benefits:- Comprehensive Plagiarism Analysis - Go beyond standard plagiarism checks by providing insights into whether the source of plagiarized content is likely AI-generated
- Deeper Source Intelligence - Gain a clearer understanding of the authenticity of external sources, helping you assess content originality more thoroughly
- Enhanced Authenticity & Integrity - Equip yourself with advanced tools to better uphold originality and academic/creative integrity by identifying both direct plagiarism and reliance on AI-generated source material
properties.aiSourceMatch feature can be easily activated with the enable parameter within your Authenticity API calls.
May 08, 2025 New
Display Language Support A new field has been added for scan submissions:- Display Language - When specified, the PDF report will be generated in the selected language. Future updates may also apply this setting to the overview and other components.
March 09, 2025 New
Overview API Introduction Copyleaks introduces the Overview API to provide key insights from user scans and author’s historical data. Features:- Gen AI Overview - Delivers a thorough analysis of each submitted scan, summarizing its content and identifying central themes or patterns
- Key Insights Analysis - Pinpoints notable findings and directs user attention to significant details within the scanned material
- Historical Context - When historical scan data is available, incorporates past insights and trends to provide a richer, context-driven perspective on current scan results
March 05, 2025 New
Course and Assignment Identification New fields have been added for scan submissions:- Course ID - A unique identifier for the course associated with the submission
- Assignment ID - A unique identifier for the assignment associated with the submission
April 18, 2024 New
Enhanced Alert Categorization A new field has been added for alerts in the completed webhook response:category- Scan alert category
April 16, 2024 New
AI Content Detection Model Versioning Added a new field to the response of AI Content Detection:modelVersion- The version of the AI Content Detection model used
April 16, 2024 New
ID Pattern Filtering for Scan Results Added a new field in the different types of Submit Endpoints in the API:properties.scanning.include.idPattern- Includes results only if their scan ID matches the supplied pattern. Matched submissions will be the only submissions included from Shared Data Hub and Private Cloud Hubs results.
April 4, 2024 New
Alert Types Documentation Added comprehensive Alert Types documentation. When scanning with Copyleaks, various alerts may be received in your Completion Webhook for AI detection, writing suggestions, failed scans, cheating, and more. This page provides a complete list of possible alerts.February 26, 2024 New
Grammar Checker API Enhancement New field added to the Grammar Checker API - Get Correction Types:correctionTypes[].category- Category of the correction type
February 26, 2024 New
Language Code Support New field added to the request body for:- AI Content Detection - Submit Natural Language
- Grammar Checker - Submit Text
-
language- The language code of your content. The selected language should be from the Supported Languages list. If not supplied, the system will automatically detect the content language.
February 25, 2024 New
Private Cloud Hubs API Introduction of the Private Cloud Hubs API. Retrieve Private Cloud Hub information including credit consumption, metadata values, and current status. Requires “Super Admin” or “Admin” role.December 7, 2023 New
Grammar Checker API Launch Introduction of the Grammar Checker API. Grammar Checker offers real-time, AI-driven writing corrections, serving as a virtual assessment API capable of providing constructive critiques and instantaneous enhancements to textual content.September 28, 2023 New
AI Content Detection for Source Code Launch of AI Content Detection API for Source Code. Use Copyleaks AI Content Detection to differentiate between human-written and AI-generated source code.May 3, 2023 New
PDF Report Version 2 Public Release PDF version 2 is now publicly available for API users. The updated PDF report includes AI detection results, cheat alerts, and an updated interface. To enable the newest version, edit theproperties.pdf.version flag of the Submit endpoint.
January 29, 2023 New
Document Template Exclusion You can now easily exclude document template text from plagiarism scanning. For more information, check theproperties.exclude.documentTemplateIds flag on the Submit endpoint.
January 12, 2023 New
AI Content Detection API Launch Launch of the AI Content Detection API, which confirms whether provided text was created by a human or AI. Read the AI Content Detection API Documentation.January 1, 2023 New
AI Content Detection Integration AI Content Detection is now available as an option within the plagiarism detection API. To enable this option, use the flagproperties.aiGeneratedText.detect.
Documentation available for the Submit endpoint.
November 13, 2022 New
Cross-Language Plagiarism Detection Launch of Cross-Language Plagiarism Detection feature. Scans can be performed on uploaded documents across nearly 30 languages, with additional languages regularly added. For example, a document uploaded in English can find potential plagiarism matches in Chinese, Spanish, German, or any other selected language. To activate this feature, use the flag:properties.scanning.crossLanguages.languages[].
Documentation available for the Submit endpoint.
November 1, 2022 New
New-Result Webhook Enhancement Added two fields to the New-Result webhook:developerPayload- The developer payload provided in the submit methodscore- The current aggregate score of the scan up to this point
May 25, 2022 New
Product Unification Merged Education and Business products into one unified product that includes all features from both previous products. Key Changes:- Former Business users can now access Education-exclusive features, such as the Copyleaks Shared Data Hub
- New endpoints available for the merged product (existing integrations remain unchanged)
- Pricing model aligned with Education pricing model (existing subscriptions unchanged)
February 9, 2022 New
Indexed Document Masking Policy Added support for indexed document masking policy for repository users. Define custom masking policies for each document in your repository. For more information, see theproperties.indexing.repositories[].maskingPolicy flag on the submit method.
February 8, 2022 New
Enhanced URL Submission Control Added options to control HTTP headers (headers field) and request method (verb field) when using Submit by URL for both Business and Education users.
February 6, 2022 New
Copyleaks Platform Release Released new version of Copyleaks with comprehensive management capabilities:- Copyleaks Identity - Manage security settings, billing, and teams or Private Cloud Hubs
- Copyleaks Authentication - Multi-factor authentication options: email or authenticator app
- Copyleaks Teams & Private Cloud Hubs - Manage users, documents, analytics, and permissions
- Copyleaks Billing - View current plan, past invoices, and billing information
January 9, 2022 New
Credits Management Documentation Added comprehensive article about effective Copyleaks credits management and monitoring: How to manage your credits?September 1, 2021 New
Teams Integration Documentation Added integration guide between Copyleaks API and Copyleaks Teams.February 28, 2021 New
Java SDK Launch Launched official SDK for Java developers: Java SDK. Package available via Maven.February 1, 2021 Change
Server IP Address Update Server IP addresses changed starting March 1, 2021. If your application is behind a firewall, update your HTTP endpoints to allow the new Copyleaks IP policy. If you are not filtering access by IP, no action is required. Starting March 1, 2021, specific IP addresses for contacting your service are not guaranteed.January 24, 2021 New
Whitelist IP Authentication Security enhancement: Whitelist IP Authentication allows approval of requests from specified IP addresses. Read more: Whitelist IP Authentication.January 21, 2021 Change
Date Format Update Updated date format in result titles for better readability.- Old format: “dd/MM/yyyy”
- New format: “MMMM dd, yyyy”
January 19, 2021 New
PHP SDK Launch Launched official SDK for PHP developers: PHP SDK. Package available via Packagist.January 17, 2021 New
Node.js SDK Launch Launched official SDK for Node.js developers: Node.js SDK. Package available via npm.January 13, 2021 New
Python SDK Launch Launched official SDK for Python developers: Python SDK. Package available via PyPI.December 24, 2020 Change
Webhook Retry Policy Enhancement Increased the number of retry attempts when sending system webhooks. Read more in the “Retry Policy” section on the Webhooks page.- Previous: Up to 12 attempts (2, 4, 8, …, 4096 seconds)
- Updated: Up to 17 attempts (2, 4, …, 65535 seconds)
December 23, 2020 New
ID Pattern Exclusion Added new feature to Submit methods:properties.scanning.exclude.idPattern. This feature allows exclusion of submissions from results if their ID matches the supplied pattern.
Available for all Submit endpoints in both Business and Education APIs.
December 10, 2020 Change
Webhooks Documentation Update Updated Webhooks documentation page with “At-Least-Once Delivery” section.November 24, 2020 Deprecated
Batch Method Deprecation The following method is now obsolete:PATCH https://api.copyleaks.com/v3/education/batch/start
November 23, 2020 New
Cross Compare Documentation New article: Cross Compare Multiple Files.November 2, 2020 New
API Dashboard Launch Launched new version of the API dashboard. Easily administer scans and visualize API scan results to ensure comprehensive monitoring.October 25, 2020 Change
Rate Limiting Implementation Copyleaks API now enforces rate limits for the following methods:https://id.copyleaks.com/v3/account/login/api- Maximum 12 calls per 15 minuteshttps://api.copyleaks.com/v3/education|businesses/scans/{scanId}/webhooks/resend- Maximum 300 calls per 60 minuteshttps://api.copyleaks.com/v3/education|businesses/usages/history- Maximum 10 calls per 60 minuteshttps://api.copyleaks.com/v3/businesses/credits- Maximum 10 calls per 15 minutes
October 15, 2020 New
Open Source Plagiarism Report Launched the Open Source Plagiarism Report. Embed a ready-to-use plagiarism report within your own domain (whitelabel). Read more: Open Source Plagiarism Report.October 10, 2020 New
Cheat Detection Added cheat detection capabilities. To enable this feature, turn on theproperties.cheatDetection flag in the Submit methods. Available for both Education and Business users.
September 18, 2020 New
Teams Capabilities Copyleaks V3 API now supports Teams capabilities. Build your own team, invite members, and share credits across multiple users.September 1, 2020 Deprecated
Download Methods Deprecation The following methods are now obsolete:https://api.copyleaks.com/v3/downloads/{scanId}https://api.copyleaks.com/v3/downloads/{scanId}/results/{resultId}https://api.copyleaks.com/v3/downloads/{scanId}/report.pdf
August 7, 2020 New
.NET Core SDK Launch Launched official SDK for .NET Core: .NET Core SDK. Package available via NuGet.August 5, 2020 New
Sensitive Data Masking Added Sensitive Data Masking feature to prevent leakage of sensitive data within submitted materials. This feature works on textual content and images; other media types are not covered. For more information, visit the Submit method documentation.June 25, 2020 New
Reference Exclusion Copyleaks now supports excluding references from educational plagiarism scans. This text detection algorithm is based on advanced AI capabilities to ensure high success rates. To use this feature, turn on theproperties.exclude.references flag.
June 1, 2020 New
Private Cloud Hubs Use Copyleaks to host all your internal documents and compare scans against them. This feature works similarly to the Copyleaks Shared Data Hub but provides private storage accessible only to you. To use this feature, purchase the product hosting plan and use theproperties.scanning.repositories flag in the Submit method.
May 15, 2020 Change
PDF Reports for Business Users PDF reports are now available for Business users. To enable this feature, turn on theproperties.pdf.create flag in the Submit method.