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AI transparency check

Do4U helps you with the transparency duties of Article 50 of the EU AI Act, which apply from 2 August 2026. You enter the address of a page or paste its HTML and answer three short questions: do you use a chatbot, do you publish AI-generated images or videos, and do you publish AI-written texts on topics of public interest? The code looks for chat widgets of known services, signs of AI-generated media in the HTML and existing AI notices. The AI then sorts out which situations likely apply, with the paragraph and a reason, and writes short notice texts: a greeting line for the chat, a label for images and a note for articles. The code checks the answer and builds the HTML for a visible label. It is a checklist with hints, not legal advice.

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Who it is for

For website owners, shops, publishers, agencies and small businesses that use a chatbot, AI images or AI-written texts and want clear notices for their visitors.

Typical uses

  • Find out whether your chatbot tells visitors that it is an AI
  • Get a short label for AI-generated images and videos
  • Write a note for AI-written articles
  • Check a page before the launch of a chat or an AI feature

Example

Input

HTML: <script src="https://www.chatbase.co/embed.min.js" defer></script> <img src="/img/team-ai-generated.jpg" alt="Our team at the office"> Answers: chatbot = not sure, images = yes and they look real, texts = no

Result

Found: AI chatbot service Chatbase (script: www.chatbase.co) Found: AI word in a file name or attribute: src: ai-generated Chatbot: tell people they are talking to an AI → Likely applies AI images and videos that look real (deep fakes) → Likely applies AI-written texts on matters of public interest → Not detected Machine-readable marking of AI output → Check How and when to inform → Check The AI explains each point and writes a chat greeting line and an image label. The code checks lengths and paragraphs and builds the HTML for a visible label.

A fixed example, shortened. Real results are AI-generated: please check them.

Price and limits

Price
usually 1–3 credits
Available with
Free, With package
Input limit
One page with up to 300,000 characters of HTML

Privacy

Processed on our own servers in the EU (Poland). Inputs and results are deleted after 7 days (Free) or 30 days (packages), or right after you see the result if you choose not to store them. Images are deleted right after processing.

In the API

Tool name: ai_transparency_check. Create a job with POST /api/v1/jobs and fetch the result with GET /api/v1/jobs/{id}. You find your API key in your account.

curl -X POST https://do4u.eu/api/v1/jobs \
  -H "Authorization: Bearer d4u_…" -H "Content-Type: application/json" \
  -d '{"tool": "ai_transparency_check", "url": "https://example.com/"}'

Full API documentation →

Questions and answers

Does the tool tell me whether my website meets the AI Act?

No. It is a checklist with hints and never confirms that a website meets the law. For each situation it names the paragraph of Article 50 of Regulation (EU) 2024/1689 and says whether it likely applies, needs checking or was not detected. Please check each point yourself and ask an expert if in doubt.

Who has to inform visitors: me or the provider of the chatbot?

Article 50(1) is a duty of the provider of an AI system that talks to people. That is usually the company behind the chatbot, but it can be you if you built it or offer it under your own name. Labelling deep fakes and AI-written texts on matters of public interest is a duty of the deployer, so of you if you use the AI system professionally. The tool shows the role for each point.

What can the code find, and what not?

The code reads the HTML: chat widgets of known services and elements that look like a chat, signs of AI-generated images such as Content Credentials (C2PA), IPTC source types or names of image generators, and existing AI notices in English, German and Polish. It cannot see a chat that a script loads later, and it never opens image or video files. That is why you answer three short questions.

Is my text stored?

Only as long as needed: 7 days on Free, 30 days with a package – or not at all if you choose not to store it. Processing happens on our own servers in the EU (Poland).

Can I use the result right away?

Results are AI-generated. Please read them before you publish or send them.

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