Privacy
Last updated: 16 October 2026. This page explains in plain words what MARS CITY AI (marscity.ai) does with information. Questions or requests: ai@marscity.ai.
Who is responsible
The website marscity.ai is run by its owner, reachable at ai@marscity.ai. It is a hobby and education project about Mars. It is a game and a story, not an official document or service.
Reading the site
You can read the blog, play the games and use the Mars clock without giving us anything. We do not use advertising or tracking cookies. The site keeps a few small notes in your own browser so that it works: your citizen level, how many questions you have asked on this visit, and your crew membership if you joined. You can clear them in your browser settings.
Ask MARTA (the chat)
- When you ask a question, the text is sent through our server to Anthropic, the company that runs the Claude AI model, so that MARTA can answer.
- Our server does not save your questions. Anthropic handles them under its own terms and privacy policy.
- Please do not type personal or sensitive information into the chat.
- Answers are written by AI and can contain mistakes.
Your passport and the Mars crew list
- If you only create a passport, your Mars name and role stay in your browser. They are not sent to us.
- If you press Join the Mars crew and tick the consent box, we store your Mars name, your role, your crew number and the time you joined, plus a secret code that lets only you remove your entry. We do not ask for your real name, email or phone number. Please use a made-up Mars name and not your real name.
- Your Mars name and role are public: they appear on the crew list on the website, and anyone who scans the QR code on your passport can check them.
- We keep the entry until you remove it. You can remove it yourself at any time with the Remove me from the crew list button, or email us and we will remove it. The owner can also remove names that are rude or not allowed.
- The legal basis is your consent, which you can withdraw at any time by removing your entry.
Services we use
- Cloudflare hosts the website and runs the small server for the chat and the crew list. Like any host, it processes technical data such as IP addresses to deliver pages and protect against abuse.
- Anthropic processes chat questions, as described above.
- Google Fonts supplies the website's fonts. Loading them means your browser contacts Google, which can see your IP address.
- GoDaddy is where the domain name is registered, and our email is handled by Microsoft 365.
Your rights
You can ask to see, correct or delete the information we hold about you, and you can withdraw your consent at any time, by emailing ai@marscity.ai. If you are in the EU, you also have the right to complain to your national data protection authority. In Latvia this is the Data State Inspectorate (dvi.gov.lv).
We may update this page when the site changes. The date at the top shows the latest version.