Systems and methods for cryptographic authentication of contactless cards

An offline transaction system, comprising:

• a client application comprising instructions for execution on a client device, the client application being in communication with a first applet executing on a contactless card associated with a user of the client device, wherein the client application is configured to:
• generate, responsive to detection of one or more reads of a near field communication (NFC) tag associated with the contactless card, one or more prompts requesting selection of an amount associated with a value received from the contactless card and display a unique merchant identifier, wherein the unique merchant identifier is assigned by a payment processor associated with at least one of the one or more transactions,
• receive, responsive to the one or more prompts, the selection of the amount associated with the value,
• transmit the selection of the amount for verification to perform one or more transactions involving stored funds and the unique merchant identifier,
• receive one or more responses indicative of verification of the selection of the amount to perform one or more transactions, and
• transmit, based on the one or more responses, one or more instructions to change a first status of a visual display associated with the contactless card to a second status of the visual display based on the selection of the amount.