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What is a U-card?

Short answer: A U-card (USDT card) is a bank card you fund with USDT or other stablecoins and spend on the Visa or Mastercard network. You send stablecoins to the U-card platform, it converts them into dollars or another currency on your card balance, and you then pay online or in stores like with any bank card.

How a U-card works

Sign up and KYC: register with the U-card platform and verify your identity. Requirements vary: some need only a passport, others proof of address too, and businesses need KYB.
Issue a card: get a virtual card (seconds to minutes) or order a physical card (days to weeks to arrive).
Top up: send USDT or another stablecoin from an exchange or wallet to the platform's deposit address, on a network it supports such as TRC20, ERC20 or Solana.
Conversion: the platform converts the stablecoin into the card's currency (usually USD) and credits your balance; this step may carry a top-up or conversion fee.
Spend: pay online or in stores like any Visa / Mastercard; transactions in another currency may add an FX fee.

Three common forms

Prepaid: top up first, spend until the balance runs out — the most common form, e.g. RedotPay, PokePay, KripiCard and ExCards. Credit: your limit is based on on-chain or exchange assets and you settle afterwards, e.g. ether.fi Cash and Bybit's Asia Pacific card. Self-custody: funds stay in your own wallet and you approve a spending allowance for the card, e.g. MetaMask Card. Each form has a different cost structure, risk profile and audience.

Who uses U-cards

Three main groups: cross-border e-commerce and growth teams paying Meta, Google and TikTok ads straight from stablecoin revenue; individuals paying for ChatGPT, Claude, Midjourney and other overseas subscriptions; and cross-border shoppers. They care about different metrics, so we publish separate selection criteria for each use case.

Checklist before you start

Confirm your residence and documents fall within the issuer's policy — see the KYC policy table.
Confirm the merchants you need accept Visa or Mastercard and don't restrict the card-issuing region.
Work out total cost, not just the issuance fee.
Test small and confirm top-ups, charges and refunds work.
Top up only what you will spend.

What a U-card costs

U-card fees fall into one-off and recurring. The one-off cost is issuance: free to tens of USDT for virtual cards, more for physical. Recurring costs are top-up, spend or conversion, and FX fees, and some cards add monthly, inactivity, replacement or closure fees. Compare them in one scenario; we always use "open a card and top up 1,000 USDT, then spend at a non-USD merchant" — see how to calculate total cost.

Common misconceptions

"U-cards are anonymous": every issuer we track requires KYC; only the documents differ.
"U-cards get around ad-platform risk controls": they don't; account review is the platform's decision.
"Money on the card is as safe as on an exchange": most U-card platforms aren't banks, balances are usually uninsured, and they may be hard to recover if a service shuts down.
"Free to open means free": top-up and FX are usually the main costs.

Cards to look at

One example of each form: RedotPay is prepaid, ether.fi Cash is a credit card, MetaMask Card is self-custody.

RedotPay: RedotPay is one of the most discussed USDT cards among Chinese-speaking users. Transparent fees, but mainland China is on the official restricted list — check your residence first. Issuance 10 usd; total cost at non-usd merchants ≥3.1%; mainland china residents: officially not eligible. Best for users outside the restricted list who mainly spend day-to-day and withdraw at ATMs; not for mainland China residents; teams whose main use is Meta ads. Read the full review

ether.fi Cash: ether.fi Cash differs from most cards in our dataset: it is a credit card with two modes, Borrow and Direct Pay, using on-chain assets as the basis for your limit. The most transparent document policy of the group, but only open to listed jurisdictions. Issuance 0 usd; total cost at non-usd merchants ≥0.5%; accepts id card / passport / passport+poa; mainland china residents: officially not eligible. Best for holders of on-chain assets living in supported regions such as Hong Kong, Taiwan, Singapore, Japan or Korea; not for mainland China residents; beginners unfamiliar with on-chain borrowing risk. Read the full review

MetaMask Card: MetaMask Card runs on Mastercard, with Crypto Life as programme manager and Monovate as issuer. Strongest self-custody story, but the regional bar is high and most Chinese-speaking users cannot apply. Issuance 0 usd; total cost at non-usd merchants 1.0%; accepts passport+poa; mainland china residents: officially not eligible. Best for on-chain users living in Europe, the UK, Latin America or other supported regions; not for mainland China residents; users who rely on TRC20 top-ups. Read the full review

FAQ

Is a U-card a bank card?

U-cards are usually issued by licensed issuers and run on Visa or Mastercard, but most platforms operating them are not banks, and balances are generally not covered by deposit insurance.

Do U-cards need a credit check?

Most U-cards are prepaid and don't check credit; the hurdle is KYC. Credit-style cards backed by crypto also look mainly at your assets rather than a traditional credit history.

Are U-cards legal?

The card itself is a payment product issued by licensed institutions, but whether you may apply and use one depends on your local laws and the issuer's regional policy. Use one only where both allow it.

Can U-cards withdraw cash at ATMs?

Some with physical cards can, such as RedotPay, Bybit Card and PokePay physical cards; virtual-only cards like ExCards and KripiCard can't. Withdrawals usually carry a fee.

How many U-cards can one person have?

It depends on the platform. KripiCard officially allows unlimited cards, KAST Standard includes 2 cards, and most personal cards are one per account.