# Plagiarism Checker API: Check Text for Plagiarism

**Use case:** 

Check any text for plagiarism through an API: send text or a document and get an overall plagiarism score plus every matching phrase with the source URL, page title and similarity score, as JSON you can use in your own app, LMS or content workflow.

## Input

```json
{
  "textContent": "It is a truth universally acknowledged, that a single man in possession of a good fortune, must be in want of a wife. However little known the feelings or views of such a man may be on his first entering a neighbourhood, this truth is so well fixed in the minds of the surrounding families, that he is considered the rightful property of some one or other of their daughters.",
  "proxyConfiguration": {
    "useApifyProxy": true,
    "apifyProxyGroups": []
  }
}
```

## Output

```json
{
  "results.document_score": {
    "label": "Document Score (%)",
    "format": "number"
  },
  "results.results.phrase": {
    "label": "Original Phrase",
    "format": "text"
  },
  "results.results.results.title": {
    "label": "Source Title",
    "format": "text"
  },
  "results.results.results.link": {
    "label": "Source URL",
    "format": "link"
  },
  "results.results.results.scores.score": {
    "label": "Match Score",
    "format": "number"
  },
  "results.results.results.scores.sentence": {
    "label": "Matched Sentence",
    "format": "text"
  }
}
```

## How it works

### 1. Sign up on Apify or log in

The Plagiarism Checker Actor is ready to run with the inputs already set for "Plagiarism Checker API: Check Text for Plagiarism". [Sign up or log in](https://console.apify.com/create-task-from-example/E6oE1a3qVxk6KfnCA) and you'll land in Apify Console with a copy of this exact task.

### 2. Start the "Plagiarism Checker API: Check Text for Plagiarism" task

The Plagiarism Checker Actor will start running based on the input automatically. You can also change all the input fields, like text to check and proxy configuration, to match your specific use case.

### 3. Receive the "Plagiarism Checker API: Check Text for Plagiarism" output

Monitor the progress in real time. You will be notified as soon as your dataset is complete and ready for review. Each result includes data such as document score (%), original phrase, source title, and more.

### 4. Integrate into your workflow

The final output is delivered in JSON, CSV, or Excel format, ready to be plugged into your workflow. You can also [run the "Plagiarism Checker API: Check Text for Plagiarism" task via API](https://apify.com/muhammetakkurtt/plagiarism-checker.md).

## FAQ

### Is there a plagiarism checker API?

Yes. This task works as a plagiarism checker API: send text through the Apify API and get a plagiarism score with every matching phrase and source as JSON.

### How do I call the plagiarism API from Python or JavaScript?

Use the apify-client library to run this task with your text as textContent, then read the dataset: one result with the document score and all matches.

### What does the plagiarism API return?

An overall document score, then each checked phrase with its matching sources: URL, page title, similarity score and the matched sentence from that page.

### How much text can I check per request?

There is no need to split text yourself: anything longer than 12,000 characters is processed automatically in chunks within the same run.

### Can I check many documents for plagiarism in bulk?

Yes. Run the task once per document from your own script or a workflow tool such as Make, Zapier or n8n, and collect every score in one place.

## About this Actor

This example demonstrates how to use [Plagiarism Checker](https://apify.com/muhammetakkurtt/plagiarism-checker.md) with a specific input configuration. Visit the [Actor detail page](https://apify.com/muhammetakkurtt/plagiarism-checker.md) to learn more, explore other use cases, and run it yourself.


## How to integrate an Actor?

This Task's input is already configured above. Use it as-is rather than inventing a new one.

Do not guess an integration path. Every one of them is in the agent quickstart at https://apify.com/agents.md: the Apify MCP server, Agent Skills with the Apify CLI, the JavaScript and Python clients, the REST API, and the account-free path for an agent with no human to sign in. It also carries the rule on stating cost before the first paid run.

For full API examples (JavaScript, Python, CLI, MCP, OpenAPI), see this Task's Actor page: https://apify.com/muhammetakkurtt/plagiarism-checker.md

Each client library has reference documentation the quickstart does not restate: [JavaScript/TypeScript](https://docs.apify.com/api/client/js/docs.md) (`npm install apify-client`) and [Python](https://docs.apify.com/api/client/python/docs.md) (`pip install apify-client`).