Legal
Acceptable use policy
What you may and may not do with yof.
Company number and registered address will be added when registration in England and Wales completes. This page is in English for now. A translation is coming.
Last updated: 8 November 2026
yof is provided by Mondaily Ltd, United Kingdom. Placeholder until the company is registered: Company number: to be added after registration in England and Wales. Registered address: to be added after registration.
Use yof on what is yours
Check only sites, apps, assistants, repositories and databases you own or have written permission to test. Proving a site is yours is how you confirm this.
Do not
- Point yof, yof attack or any yof tool at a system you are not allowed to test.
- Try to get around proof of ownership, rate limits or account limits, or use many accounts to do so.
- Use findings to break into, damage or extort anyone.
- Change a yof report and present it as yof's, or claim a report says an app is safe, certified or compliant.
- Resell reports, except reports from the Agency bundle for your own clients.
- Attack, overload or probe yof itself outside the security policy on yof.io/security.
- Upload malware or content you have no right to share.
Reporting abuse
If someone uses yof against you, write to support@yof.io. We may suspend accounts that break this policy.
Questions or problems? Email support@yof.io.