Plagiarism Checker Plus

Plagiarism checker and AI detector for essays, research papers and articles. Find copied text with source links and see how likely each sentence is to be AI-written. A score is a likelihood, not proof.

Hosted MCP Server

npx add-mcp 'https://app.plagiarismcheckerplus.com/api/mcp'

Installs into Claude Code, Codex, Cursor and more

Documentation

Check plagiarism and AI writing from your AI assistant

Connect Plagiarism Checker Plus to an AI assistant that supports remote MCP servers, then ask it to check a draft. Results link to the full report on your account.

check_plagiarism

Starts a plagiarism check of the text. Needs at least 30 words. Uses one word from your balance for each word checked.

detect_ai

Starts an AI writing check of the text. Needs at least 50 words. Uses one word from your balance for each word checked. The result is a likelihood, not proof.

get_scan_result

Reads the status of a check on your account and, once it is finished, the result. Free to call.

get_word_balance

Reads your plan and the words left this month. Free to call.

  • Check this essay with Plagiarism Checker Plus and show me the passages that match a source.
  • Use Plagiarism Checker Plus to check this article for AI writing and show the sentences with the highest likelihood.
  • How many words do I have left on Plagiarism Checker Plus?

Text sent through the connector is handled like any other check. The scan and its result are saved to your account history. We do not sell this data, use it for advertising, or use it to train AI models, and the connector does not show ads. The assistant you use is a separate service with its own privacy policy. Read Section 7 of our privacy policy for details, or contact us for help.

Is the connector free?

The connector has no separate cost. Each check uses words from your account, the same as a check on our site. A free account includes 3,000 words a month. Running both checks on a text uses its word count twice.

What happens when I run out of words?

Does an AI score prove that someone used AI?

Will the result match Turnitin?

How do I unlink it or delete my data?

Create a free account

You need an account to connect. A free account includes 3,000 words a month.