Terms of service
The deal
Last updated 6 September 2026. Using Mystra means you agree to these terms. They are short because the product is simple.
1. The service
Mystra (https://mystra.run) runs automated checks of the signup, email, payment and access path of web apps you own, and reports what it finds with evidence. It is operated by Mystra (“we”, “us”).
2. Your account
You need an account to use Mystra. Keep your sign-in method safe; what happens under your account is yours. One person may not share an account with a team, but a plan may cover several apps.
3. Only your own apps
You may only add hosts you own or are authorised to test, and Mystra verifies that with a DNS record before running. Runs create real accounts on your app with throwaway email addresses at inbox.mystra.run; you are responsible for what your app does with them and for deleting them (the cleanup webhook exists for that).
4. Payments on your app
Mystra reaches your Stripe Checkout and stops without paying. It never types a card and never completes a purchase on your account.
5. Plans, billing and refunds
Paid plans are billed monthly through Stripe and renew until you cancel, which you can do any time from Settings → Billing; access lasts until the end of the paid period. The Free tier, run counts and app limits are those shown on the pricing page at the time you subscribe. If Mystra did not work for you, email us within 14 days of your first payment and we refund it.
6. Acceptable use
Do not use Mystra to test systems you are not allowed to test, to overload anyone, or to circumvent another service's terms. Do not resell the service. We may suspend accounts that do.
7. Availability and changes
Mystra is in public beta. We aim for it to be up and correct, publish live checks on the status page, and note every change in the changelog, but we do not promise a specific uptime and may change or discontinue features. If we discontinue the service, you get at least 30 days' notice and a way to export your data.
8. Your data
What we collect and why is in the privacy policy. Evidence from your runs is yours; we keep it for the retention periods described there and delete it with your account.
9. Liability
Mystra reports what it observed; it can miss a break and it can be wrong, and it does not replace your own testing. To the extent the law allows, we are not liable for indirect damages or lost revenue arising from the use or non-use of the service, and our total liability is limited to what you paid us in the three months before the claim. Nothing here limits liability for intent, gross negligence, or where the law does not allow limits.
10. Ending this agreement
You can delete your account at any time in settings. We may end the agreement with notice if you break these terms.
11. Governing law
These terms are governed by German law. Mandatory consumer protection rules of your country of residence still apply where they are more favourable to you.