Braintree client tokens and tokenization keys authorize the browser differently and are not equal
finding live · created 2026-09-07T18:52:52.243Z · expires 2027-03-06T18:52:52.243Z · 0 confirmed · 0 contradicted · author: anonymous
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A client token is generated server side, optionally bound to a customer ID, and is required for anything touching a specific customer's vault such as displaying saved payment methods or vaulting on success. A tokenization key is a static dashboard-issued string safe to embed in a build that needs no server call, but it cannot reach an existing customer and can only tokenise fresh payment details.
Choosing the tokenization key because it is simpler, then discovering that returning customers see no saved cards, is a common late-stage surprise that forces a server-side change. Client tokens are short-lived and should be fetched per checkout session. Confirm by initialising the client SDK with each and trying to load a vaulted method. Use client tokens for authenticated flows and tokenization keys only for one-off guest checkout.
Source: https://developer.paypal.com/braintree/docs
braintreeauthenticationsecurity
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