Privacy Policy

1. Who we are

Miestrü ("we," "us") is a product of Mähnbach LLC, a United States company. This policy explains how we handle information when you use the Miestrü application and website. Contact: Info@mahnbach.com.

2. What this policy covers

This policy covers the Miestrü application, which connects to a seller's own Amazon Selling Partner (Seller Central) account through Amazon's Selling Partner API (SP-API), and the miestru.com website. It applies to the established e-commerce sellers who use the service. It also covers how you sign in to and create a Miestrü account, including the optional "Sign in with Amazon" method described in Section 3.

About the miestru.com website. The website is an informational site. It does not offer account sign-up, and we do not set advertising or tracking cookies or run cross-site analytics on it. Standard server and delivery logs (such as IP address and request details) are processed by our hosting provider to operate and secure the site, which may include privacy-preserving, cookieless traffic measurement. When account sign-up or paid features launch, we will update this policy to describe the information they collect. The rights described in Section 11 apply to any personal information the website collects, as well as to your business data.

3. Signing in (optional): Sign in with Amazon

You can create your Miestrü account and sign in with an email address and password. As a convenience, we also offer "Sign in with Amazon" — an optional way to sign in using your existing Amazon account, so you don't have to manage another password.

What we receive when you use it. If you choose "Sign in with Amazon," Amazon confirms your identity and sends us a limited set of profile information: your name, the email address registered with your Amazon account, and a unique Amazon user ID. That is all we receive. We request only this basic profile information — we do not request your Amazon postal code or any other Amazon data through sign-in.

We never receive your Amazon password. You enter your password with Amazon, not with us. Amazon handles the sign-in and sends us only the profile information above — your Amazon credentials are never shared with Miestrü.

How we use it. We use this information solely to sign you in and to create or link your Miestrü account. We do not use it for marketing or for any other purpose.

Signing in is separate from connecting your Amazon data. Choosing "Sign in with Amazon" only proves who you are — it does not give Miestrü any access to your Amazon selling or advertising data. Connecting your Seller Central account (Section 4) or your Amazon Advertising account is a separate, explicit step that you take on purpose and can decline or undo at any time. You can sign in with Amazon and never connect any data; or connect your data without ever using "Sign in with Amazon." The two are always kept distinct.

You are never required to use it. Email-and-password sign-in is always available. You never need an Amazon account to use Miestrü.

4. The data we access

When you authorize Miestrü, you grant a read-only connection to your own Amazon Selling Partner account. We access only what we need to give you guidance about your own business, which may include:

• Account health information — your rating, policy notifications, and listing or account status.
• Catalog information — your own products (SKUs), listings, prices, and status.
• Performance information — aggregate metrics about your own sales, orders, inventory, and fees (order counts, units, and sales totals by interval).
• Advertising information — where you separately connect your Amazon Advertising account, read-only, aggregate metrics about your own advertising (such as campaign spend, impressions, clicks, and sales performance), used only to give you guidance about your own business.

We request only Amazon's unrestricted API roles that correspond to this data. We do not request roles that grant access to consumer personal information. Connecting your Amazon Advertising account is separate and optional, the same way the Seller Central connection is. (This capability is being prepared; where the policy describes advertising data, it applies once that connection is available to you.)

5. What we do not access

• No buyer personal information kept. We do not durably store your customers' personal information. Any order-level detail that could include buyer information is read only to compute aggregate business metrics (like order counts and totals) and is never saved in that form; if any buyer-identifying text ever arrives incidentally (for example, inside a notice from Amazon), it is automatically deleted within 30 days and is never used for any purpose. We work from your business's own aggregate data.
• No write access. Our connection is read-only. We cannot and do not post, edit, price, message, place orders, manage campaigns, or make any change to your account.

6. How we use your data

We use your data for one purpose: to analyze your own account and return guidance to you — a plain-language read of where you stand and a recommended next action. Our analysis runs over your current data at the time of the request (inference only). We do not use your data for any other purpose.

7. What we never do

• We never sell, rent, or share your data with third parties for their own purposes.
• We never use your data to develop, train, fine-tune, or improve any machine-learning or artificial-intelligence models.

We do not currently combine your data with other sellers' data or build cross-seller benchmarks from it. If we ever introduce anonymized, aggregate benchmarking that cannot identify any individual seller, we will update this policy before doing so.

8. Amazon Selling Partner and Advertising data

Our handling of Amazon Selling Partner data complies with the Amazon Acceptable Use Policy and Data Protection Policy. In particular: we do not durably retain buyer personally identifiable information; buyer-identifying fields are never durably stored, and any incidental buyer-identifying text is capped at a 30-day automatic deletion window; and any order-level information is read as aggregates and not persisted. Our use of Amazon data is limited to delivering and operating the Miestrü application for the authorizing seller. Miestrü uses Amazon's API but is not endorsed or certified by Amazon.

Our use of Amazon Advertising data follows the same principles and the applicable Amazon Advertising API terms: we access only the authorizing seller's own advertising data, read-only, to deliver and operate Miestrü for that seller; we do not sell it, use it to train models, or combine it with other sellers' data.

9. Data retention and deletion

We retain your data only as long as needed to provide the service to you. You can disconnect Miestrü from your Amazon account at any time; when you do, we stop reading your account and delete the data we hold. You may also request deletion of your data by contacting us. Any transient information subject to Amazon's retention limits is deleted within the required period.

If you use "Sign in with Amazon," we keep the basic profile information it provides (your name, email, and Amazon user ID) for as long as you have a Miestrü account, so we can recognize you when you return. When you delete your account — or ask us to delete your data — we delete that information too.

10. How we protect your data

• Data is encrypted in transit and at rest.
• Access is restricted on a least-privilege basis, and each seller's data is isolated from every other seller's.
• Authorization credentials are stored in a secured secrets vault, rotated, and revoked when you disconnect.

11. Your choices

• You choose whether to connect your account, and you can disconnect at any time.
• You choose whether to use "Sign in with Amazon" or an email and password, and you can delete your Miestrü account (and the identity information tied to it) at any time by contacting us.
• You can request access to, or deletion of, the data we hold about your business.
• You can contact us with any privacy question at Info@mahnbach.com.

12. Changes to this policy

If we make material changes to this policy, we will update the date above and, where appropriate, notify connected sellers. Continued use of the service after a change means you accept the updated policy.

13. Contact

Mähnbach LLC — Miestrü
Privacy questions: Info@mahnbach.com