Privacy Policy — TCG Bundle

Last updated: 13 September 2026

TCG Bundle is a browser extension that helps you buy a list of trading cards on cardmarket.com for less, by combining sellers and including shipping costs. This policy explains what the extension and the TCG Bundle service do with your data.

The short version

• Your card list and the Cardmarket offers you view stay on your computer.
• To see which sellers a buying plan uses (and order from them) you need a free TCG Bundle account. Your email address is handled by our authentication provider, Clerk.
• Our server stores your account ID, your plan and, per buying plan you unlock, only totals (number of cards and sellers, amounts, estimated saving).
• We do not sell data, show ads or use third-party analytics or tracking.

Stored on your computer

In chrome.storage.local: the cards you are looking for and your requirements, the seller offers visible on Cardmarket product pages you opened yourself (seller name, country, price, condition, language, stock, number of sales, seller rating, estimated delivery time and the seller's offer description), your buying plan, check-off state and skipped offers, your filter and language settings, and your sign-in session.

Account data (Clerk)

When you create an account or sign in, your email address, your password and one-time email codes are processed by Clerk, Inc. (United States), which provides sign-in and sessions for TCG Bundle. TCG Bundle never sees or stores your password. See Clerk's privacy policy for details.

Stored by TCG Bundle (our server)

Hosted on Railway in the EU:

• Your Clerk user ID, when your account was created and last used, and whether you joined during the beta.
• Your plan and access rights (for example Beta Pro), with start and end dates.
• For each buying plan you unlock: the number of cards, copies and sellers, the total before and after optimisation, the estimated saving, and the extension version. No card names, seller names, prices of individual offers or URLs.
• If paid plans are introduced later: your Stripe customer ID and purchases. Payment details are handled by Stripe, never by TCG Bundle.

We use this to provide access, to prevent abuse and to understand (in aggregate) how much TCG Bundle saves its users.

What TCG Bundle reads on Cardmarket

When you open a card's product page yourself, TCG Bundle reads the offer table already displayed on that page: price, condition, seller name, country, number of sales, seller rating, estimated delivery time and the seller's short offer description (shown to you, and used to skip graded cards if you keep that filter on). This stays on your computer. When you open an offer from your buying plan, TCG Bundle temporarily outlines that offer on the page. It never sends requests to Cardmarket, opens tabs, clicks, or adds items to your cart.

Cart check

When you open your Cardmarket shopping cart yourself, TCG Bundle reads the per-seller summary shown there (article value, shipping, Trustee Service, total and shipping method) to compare it with your buying plan. It never reads or stores your shipping address, phone number or payment details, and it never changes your cart. The result stays on your computer.

Reports ("Klopt er iets niet?")

If you report a problem, TCG Bundle sends your chosen reason, your short explanation (max. 300 characters) and the amounts and shipping methods per seller from your buying plan (and from your cart check, if available) to TCG Bundle, linked to your account ID. It never includes your address or payment details. Reports are used to fix errors and improve accuracy; if you delete your account, reports are kept without any link to you.

Card images

For Pokémon cards, TCG Bundle shows a reference image of the card, loaded from TCGdex (assets.tcgdex.net). Loading an image means TCGdex receives a normal image request from your browser (such as your IP address and which card image is requested). The image only helps you recognise the card; it does not show the condition of an offer.

Permissions

• storage — to keep your list, plan and session on your computer.
• sidePanel — to show the TCG Bundle panel next to Cardmarket.
• cardmarket.com card pages and shopping cart — to read the offer table, outline the offer you open and compare your cart with your plan. It runs on no other pages.
• TCG Bundle API and Clerk — to sign in and unlock buying plans.

Retention and deletion

• Local data: remove cards from your list, start a new list after ordering, or remove the extension to delete everything stored in your browser.
• Your account: Settings → Delete account permanently deletes your account at Clerk (email address, password, sessions) and your plan and credit records at TCG Bundle. Unlock totals and reports are kept without any link to you, as anonymous statistics.

Your rights

You can ask for access to, correction of, or deletion of your data, and you can lodge a complaint with your data protection authority (in the Netherlands: the Autoriteit Persoonsgegevens). Contact us at the address below.

Third parties

TCG Bundle is an independent tool and is not affiliated with, endorsed by, or connected to Cardmarket in any way.

Contact

TCGBundle — tcgbundleapp@gmail.com