A self-custody crypto card with a strong top-up story and a lot of unanswered questions

Updated October 2026

Licensed

Available in US

Fast payouts

18+ Only

The Cadmos card is a crypto payment card that spends stablecoins out of a wallet you hold yourself, and on paper it ticks several boxes people in this space care about: no monthly fee on the Premium version, a stated foreign-exchange fee of 1.75% rather than a vague “fair usage” clause, USDC and USDT accepted over three named networks, and a company registered in Cyprus since 2021. What it does not do is explain very much. The list of eligible countries is not published, the issuing bank is not named, no licence is named in the terms, and the fees that matter most to a self-custody user — the cost of issuance and the crypto conversion fee — are simply absent from the public pages.

That combination produces an awkward review. The card is not obviously bad. It is obviously under-documented, and for a product whose entire value is letting you spend crypto you already hold, under-documentation is itself a cost.

The conditions described below are current as of October 28, 2026.

My score for Cadmos is 7.0 out of 10. Here is how that breaks down, criterion by criterion, with the reasoning rather than the arithmetic.

Who this suits, in one line: people who already hold USDC or USDT in their own wallet, who are comfortable with self-custody, and who can tolerate an app whose eligibility rules are not written down anywhere public. Who it does not suit: anyone who needs a predictable answer to “which countries?”, anyone who wants to see who is issuing the card, and anyone who plans to draw cash from an ATM — that last point is not covered at all in the public material, and I would not assume it works.

Will they give you the card?

Cadmos does not publish a list of countries. That is the honest starting point, and it matters more than it might look. Instead of a country list, the availability statement says that it depends on eligibility and on the options shown in the app — meaning you find out by installing the app and looking, not by reading a page beforehand. The one geographic rule that is written down is a negative one: the terms require that users not be in a US-embargoed country.

So the practical picture for someone asking “is Cadmos card available in my country?” is this: you cannot answer it from the public pages. You can only answer it from the app. That is a weaker position than almost every competitor, several of which publish either a residence list or an explicit statement that ineligible regions limit sign-ups but not spending.

There is a second, less visible gate that is worth understanding before you start. Card issuing runs on KYC, and KYC is where country rules actually bite. In the EU, customer due diligence covers name, address, date of birth, nationality and identity documentation, a sanctions check, the purpose of the relationship, and politically-exposed-person screening. In the US, the customer identification programme requires name, date of birth, address and an identification number, with electronic systems also validating proof-of-address documents against records. Nationality is recorded and screened separately from residence, because sanctions screening and issuer risk policy are often applied to citizenship and country of birth as well as to country of address.

The point of raising this is not to alarm you. It is to explain why an unpublished country list is common in this category: eligibility is often decided at the issuer’s desk, per applicant, rather than by the brand. If you have a passport from one country and live in another, the passport decides more than you would expect.

The one thing that is clear is that the terms exclude US-embargoed countries. I am not going to speculate about workarounds, and you should be equally sceptical of anyone who does.

How to get it

The application path is short on detail, which is unusual and worth stating up front. Verification differs by card product and is shown on the order screen. What that verification may include is a government ID, personal information, and proof of liveness. What is not stated anywhere on the public pages: whether proof of address is required, whether an age check forms part of it, and which tier of KYC applies to which product. So if your reason for wanting a crypto card is that you cannot pass a conventional bank’s checks, the honest answer is that Cadmos’s public pages do not tell you what it will demand of you.

The card itself comes in two products, and this is the most useful differentiator between them:

• Premium is a Visa Signature card.
• Standard is Visa or Mastercard — the app shows which one at the time you order.

Whether the card arrives as a virtual card, a physical card, or both is not stated. Neither is the currency the card is denominated in, which matters a great deal once you start reading the fee section. Delivery timelines are not stated either, so “how long until it arrives” is an open question. The same goes for activation: the public pages describe no activation step, so I cannot tell you whether activation is instant on issuance or requires a first transaction, a phone call, or an app confirmation.

If you already use a self-custodial wallet, the pitch is coherent. A seed phrase is typically 12 to 24 words and is an unencrypted form of the private key; anyone who obtains it can restore the wallet and spend its funds. A self-custody product asks you to hold that phrase, and Cadmos is explicit about what it does not do with it.

Fees: what it really costs

Cost is where Cadmos is simultaneously the most attractive and the least transparent. The Premium version’s headline numbers are good: $0 monthly fee and a 1.75% FX fee. The Standard version’s costs are not stated publicly; they are shown on the order screen. And for both versions, the two fees a self-custody spender cares most about — issuance, and the conversion of crypto into spendable balance — are not disclosed.

I want to be careful here about how I present an absence. “Not stated” means the card’s public pages do not say. It does not mean the fee is zero, and it does not mean it is high. It means you will see it at order time and nowhere else, which is precisely the moment when you are least inclined to walk away.

Three everyday payments, and which fees land on each.

A coffee in your own currency, from a balance already in that currency. If your card is denominated in the currency of the café and your balance matches, there is no conversion and no FX event, so in principle nothing is charged beyond whatever the network and merchant do. That is the cleanest case, and it is the case the Premium fee schedule is built around.

A coffee in a currency your balance is not in. This is where the 1.75% Premium FX fee applies, and it applies on top of whatever spread the conversion itself carries — a spread that is not published. You are therefore paying a known percentage plus an unknown one. Two numbers would make this comparable to anything else in the market; you get one.

An online purchase funded by a USDC transfer you just made. Here the cost stack is at its tallest. The on-chain network fee for your deposit is charged by the blockchain, not by Cadmos — on Ethereum that gas must be paid in ETH, which is a common and avoidable surprise if your wallet holds USDT and no ETH. Then the card’s own conversion fee applies, which is not stated. Then, if the merchant prices in a currency other than your balance, the FX fee. And if the merchant is online, you may be hit by an identity check: Visa’s version is called Visa Secure, Mastercard’s is Identity Check, and the standard is EMV 3-D Secure 2, published in 2016, which supports one-time passcodes and app-based authentication aligned with EU strong customer authentication.

Two more costs sit outside the card entirely and are worth naming so you do not attribute them to it. Declined authorisations may leave a hold on your funds that can persist for several days, typically up to seven. And address verification — comparing the numeric parts of the billing address you typed against issuer records — is mainly offered in the US, Canada and the UK, and is generally unavailable for foreign-issued cards, which causes declines at otherwise ordinary merchants. Neither is a Cadmos fee, but both are the practical cost of spending a card issued in one country from another.

The Premium tier’s benefits are real and unusually generous for a $0 product: Visa Signature benefits, lounge access at more than 1,300 lounges in over 500 cities, 24/7 concierge, and Visa Airport Companion. Standard lists no benefits.

How to top up

Top-up is the strongest part of the offer, and it is the reason the overall score is not lower. Here is the whole mechanism.

Your money stays in a self-custodial wallet. You send USDC or USDT to the card, and it is settled in fiat at the merchant. Three transfer networks are listed: Arbitrum, Solana and Tron. Those are genuinely good options — Arbitrum and Solana are inexpensive and fast, and Tron is the conventional home of USDT, which has been issued on networks including Ethereum, Tron, Solana, Polygon and Avalanche among others.

You keep control until a top-up is approved. That phrasing matters: the wallet balance remains self-custodial until approval, so the moment of conversion is a boundary you should watch rather than assume has already passed. Fees and minimums for top-ups are not stated.

On the choice of stablecoin, some background that bears directly on your choice of network. USDC and USDT are US-dollar-pegged, and the BIS put about 90% of stablecoin market capitalisation in these two as of July 2025. Circle says USDC is redeemable 1:1 for USD and 100% backed by cash and cash equivalents, mostly in an SEC-registered government money market fund, with monthly reserve attestations by a Big Four firm; Circle listed USDC as natively supported on 38 networks as of 16 September 2026, including Ethereum, Solana, Base, Polygon PoS, Avalanche, Arbitrum and Stellar. Tether describes USDT as a token built on multiple blockchains with reserves intended to back it 1-to-1.

Here is the trap, and it is the single most useful thing I can tell you about topping up this card: Circle stopped supporting USDC on Tron in February 2024, so “USDC over TRC20” is not a native option. Tron being listed as a transfer network therefore does not mean USDC on Tron is a clean route. USDT on Tron remains the natural pairing there.

Send on the wrong network and the consequences are severe. Blockchain transfers are irreversible, so a deposit sent on a network the provider does not support, or to an address belonging to a different network, can be lost entirely or require manual support recovery with no guarantee. Take two minutes to check the network before you sign.

And the name is not a guarantee. A stablecoin aims to hold a stable value against an asset such as a fiat currency, but stablecoins are not necessarily stable: TerraUSD collapsed in May 2022, and USDC temporarily lost its peg in March 2023 during the US banking crisis. Tether says it disables tokens in wallets on the OFAC sanctions list and has frozen funds tied to illicit activity, so stablecoins are not censorship-proof either.

Paying with it every day

For day-to-day spending, the practical question is which product you hold, because the wallets differ.

• Premium works with Apple Pay and Google Pay.
• Standard works with Apple Pay — for both the Visa and Mastercard versions. Google Pay is not mentioned for Standard.

How mobile wallet payments work is worth understanding, because it explains why adding the card to your phone is a meaningful step. Apple Pay replaces the card number with a device-specific Device Account Number stored in the Secure Element, never on Apple servers, and each payment uses a one-time dynamic security code. That is a genuine reduction in exposure compared with handing over a card number — but it is not the same as protection from the card being frozen, which is a decision the issuer makes, and which can apply to a tokenised number on magnetic stripe, phone or website use.

Where the card can be spent is not stated beyond that. Blocked merchant categories are not listed, which is a real omission: a merchant category code is a four-digit number classifying a business by goods and services under ISO 18245, and gambling sits under MCC 7995. Issuers block specific categories on specific cards by policy rather than by law, and the blocked list varies by issuer. If gambling, adult content, or fuel is something you spend on, you will not find the answer here — you will have to ask support, or find out at the till.

Cash is the other silence. ATM availability is not stated for either product. If you are someone who needs physical cash — for a market that does not take cards, or for a country where your other payment routes have dried up — treat this as an unanswered question, not a yes.

There is no rewards information at all: cashback, rate, caps, none of it is stated. The Premium’s lounge and concierge benefits are the only perks with numbers attached.

Support, at least, is documented. The address is [email protected], tickets run through Settings > Help Center in the app, and there is a phone number, +1 (845) 588-8434. Premium adds a 24/7 concierge by email and WhatsApp. That is a good support surface on paper; whether it is good in practice, nobody has posted about.

If something goes wrong with a transaction, the terms say French law applies and the courts of Paris have jurisdiction, with a 30-day good-faith resolution window after written notice. The card chargeback process is not stated. A chargeback is a refund ordered by the card issuer to settle a dispute, with reason codes such as fraud, duplicate billing or goods not received — and in the US, debit card reversal rights come from Regulation E and credit card rights from Regulation Z, while prepaid-card coverage varies and should not be assumed. Since I cannot tell you what Cadmos’s card is issued as, I cannot tell you which regime protects you.

One last tax-shaped point, offered as information rather than advice: the IRS treats digital assets as property, so exchanging them for goods, services, dollars or other digital assets generally produces a taxable gain or loss. For personal or investment holdings the result is a capital gain or loss, short-term if held one year or less, measured in local fiat currency using fair market value on the date of the transaction. Each card payment funded from crypto may therefore be a separate disposal. I am not a tax adviser and this is not tax advice — but if you will spend meaningfully through this card, treat the paperwork as part of the cost.

What can go wrong

Let us separate the risks into the ones the card addresses and the ones it does not.

The company is Cadmos LTD, registered in Limassol, Cyprus, registration number HE 457316, founded 2021. That is a real, checkable registration. But the card issuer is not named, and no licence is named in the terms. That matters more than it first appears, because of how this category is built: a crypto brand is often only a programme manager or front end that markets the card, while an actual bank or licensed e-money institution holds the card programme. Visa and Mastercard do not issue crypto cards to consumers themselves — they license issuers, and they can suspend a programme. In November 2022 Visa said it had “terminated our global agreements with FTX”, and the FTX US debit card was wound down by its issuer.

History in this category is not reassuring. WaveCrest, a Visa card issuer that supplied crypto card brands, was suspended by Visa in Europe in 2018, closing all WaveCrest-issued Visa programmes. Programme closures typically follow a pattern: a notice period, then loading and spending stop, then users are asked to withdraw remaining balances. One 2026 closure reported by a secondary source ended new loads on 8 July 2026 and spending on 8 August 2026 — I am flagging that as single-source and unconfirmed, but the shape of it is what to expect.

On your own funds, the good news is clear. Cadmos states that it does not receive, hold, safeguard, or acquire title to your digital assets or fiat funds. That is the self-custody promise made explicit: you hold the recovery phrase. The trade-off is the mirror image of the benefit. With a custodial platform you carry counterparty and hack risk — Mt. Gox reported about US$350 million stolen between 2011 and 2014, Coincheck about US$400 million in 2018, Ronin Network US$625 million in 2022. With a self-custody-linked card, that risk leaves your address entirely and becomes your own: key loss, phishing, and clipboard-hijacking malware that silently swaps a copied address. Blockchain transfers are irreversible and a stolen private key has no built-in recovery.

Account closure is the quiet risk. The terms describe closure by email, and they say closure does not freeze or move digital assets. That is a genuine reassurance about your self-custodial holdings. It is silent on the thing you actually lose: whether you can withdraw a card balance, which is not stated. So the sequence to think about is the one nobody spells out — what happens to money already loaded onto the card when you decide to leave. Test it while you can still afford to.

Typical safeguards available in this category are app-based 2FA, instant card freeze, spending limits, 3-D Secure confirmation, and tokenised mobile wallets. The public pages do not tell me which of these Cadmos offers. That is a question for support, and it is a better question to ask on day one than on day one of a problem.

Finally, the reputational record: I found no Trustpilot page and no Reddit discussion of Cadmos Pay. Complaints are not stated, and there is no complaint detail to report. A thin complaint record for a young product is not a red flag — it is an absence of evidence in both directions, and it cuts against anyone claiming either that the card is well loved or that it is a scam.

What to take instead

If any of the above gives you pause, the honest move is to look at the alternatives rather than wait. Here is how three of them compare to Cadmos, on the same criteria I scored Cadmos on.

Reading across the rows tells you something useful. MetaMask scores highest (7.1) and publishes its eligibility rules, names its issuer (Monovate, card provider Crypto Life), states its card cost plainly, and promises no foreign transaction fee at all — using the Mastercard rate instead of adding a percentage. Its catch is availability: 45 listed countries and territories, everyone else on a waitlist, US and UK sign-ups temporarily closed, proof of residency required, one card per user, and a note that ineligible regions limit sign-ups but not spending.

TokenPocket scores lowest (5.8) and its fees are the murkiest: a 1% fee charged when depositing cryptocurrency into the card, said to be refunded later through rewards or reduced transaction fees, plus possible inter-institution settlement costs. Its list of supported countries is one of the most specific here.

KAST scores 6.1 and is the most explicit about both money and rules. Annual membership is 0 / 1,000 / 10,000 USD by tier; stablecoin top-up 0%, card spend in USD 0%, transaction fee 0%, Apple and Google Pay 0%, non-USD FX 0.5%–1.75% depending on where you live, where you spend and which programme you hold, 0.10 USD on non-USD transactions under 25 USD, 0.50 USD for a declined transaction for insufficient balance, and 1 USD/month inactivity after 12 months. It publishes a residence rule at KYC and is unusually candid that holding an ID from a restricted region can disqualify you even if you live in a supported country, that dual citizens with a supported-country ID may pass, that only your own ID is accepted, and that a VPN does not bypass this.

The comparison that matters most is narrow. If the reason you want a crypto card is that ordinary banking is hard for you, eligibility transparency is the feature, and Cadmos is the weakest of the four on it. If the reason is that you hold stablecoins and want to spend them, fees are the feature, and Cadmos’s 1.75% Premium FX fee is respectable — but you are buying it without knowing the issuance or conversion charge. If the reason is cashback, KAST and MetaMask both publish rates and caps and Cadmos publishes nothing.

Who I would recommend it to

I would recommend this card to someone who already lives in self-custody. Someone with a working wallet, a real understanding of networks and seed phrases, USDC or USDT sitting in it, and a spending pattern that is mostly online or in-app — because Apple Pay on both products is the part I am most confident about. If you are comfortable reading a token contract address before you sign a transfer, and you have already decided you will never leave a seed phrase in someone else’s hands, Cadmos does that job at no monthly cost.

I would recommend it, second, to anyone for whom a $0 monthly fee on a Visa Signature with lounge access is simply a good deal, provided they read the order screen before confirming rather than after.

I would not recommend it as a first crypto card, and I would not recommend it to anyone who needs certainty in the three places Cadmos is silent. If your priority is knowing you are eligible before you download anything, or knowing who stands behind the card, or being able to withdraw a loaded balance at short notice — pick a competitor that publishes those things. MetaMask and KAST publish more than Cadmos does, and publishing is the cheapest signal of seriousness available.

The thing I would hold this card to is the missing issuer and licence. Not because I think something is wrong — the Cyprus registration is real, and the self-custody wording about your assets is unusually explicit — but because in this category a programme can be suspended by the network, and a programme closure takes your ability to spend with it. When you email [email protected], that is the question I would put at the top of the list: who is the issuer, and what happens to a loaded balance if the programme ends.

Frequently asked questions

What is Cadmos card?

Cadmos is a crypto payment card that lets you spend stablecoins held in your own self-custodial wallet as everyday card payments. Two products exist: Premium, a Visa Signature card, and Standard, a Visa or Mastercard card shown in the app. The funds stay in a wallet you control, and Cadmos states it does not receive, hold, safeguard or acquire title to your digital assets or fiat funds.

How does Cadmos card work?

You send USDC or USDT to the card over one of three listed networks — Arbitrum, Solana or Tron — and it is settled in fiat at the merchant. Your wallet balance stays self-custodial until a top-up is approved, after which the card spends a converted balance. On-chain network fees are charged by the blockchain itself, not by Cadmos, and top-up fees and minimums are not stated.

Is Cadmos a bank?

No, and the public pages do not describe it as one. The company is Cadmos LTD, Limassol, Cyprus, registration number HE 457316, founded 2021. The card issuer is not named and no licence is named in the terms. Card issuing is normally done by a bank or e-money institution, with the crypto brand acting as programme manager, so the absence of a named issuer is a genuine gap.

Who owns Cadmos?

Cadmos LTD is the named company behind the card, registered in Limassol, Cyprus in 2021 under number HE 457316. Who owns that company is not stated on the public pages, and no other corporate details are given. I found no press coverage or corporate announcement that would clarify ownership either.

Is the Cadmos card available in my country?

Cadmos does not publish a country list. Availability depends on eligibility and on the options shown in the app, so the only way to find out is to install it and look. The one written geographic rule is negative: the terms require that users not be in a US-embargoed country. No citizenship rule is published either.

Does the Cadmos card require KYC?

Yes, in the sense that any regulated issuing partner requires it. The card states that KYC differs by product and is shown on the order screen, and that it can include a government ID, personal information and proof of liveness. Proof of address and age requirements are not stated, and the KYC level per product is not published — so if you are trying to work out whether you will pass, the order screen is your only source.

How much does the Cadmos card cost?

Premium costs $0 in monthly fees and charges a 1.75% FX fee, and it carries a monthly spend limit of $175,000. Standard’s costs are not stated publicly and appear on the order screen; its cross-border and FX fees follow its programme terms with no figures given. For both products, the issuance fee and the crypto conversion fee are not stated, and ATM access is not addressed at all.

How do I top up the Cadmos card?

Send USDC or USDT from your self-custodial wallet using one of the three listed transfer networks: Arbitrum, Solana or Tron. Check the network carefully before signing, because transfers are irreversible and a wrong-network deposit can be lost. Note also that Circle stopped supporting USDC on Tron in February 2024, so USDT is the natural Tron pairing rather than USDC.

Is the Cadmos card safe?

Your crypto stays in a self-custodial wallet and you hold the recovery phrase, so Cadmos says it does not take custody. The trade-off is that key loss, phishing and malware become your problem alone, and blockchain transfers cannot be reversed. On the company side, the issuer and licence are not named, and card programmes in this category can be suspended — Visa ended its global agreements with FTX in November 2022.

Is the Cadmos card worth it?

For a Premium customer who spends stablecoins they already hold and needs Apple Pay and Google Pay at no monthly cost, possibly yes — the $0 fee and lounge access are genuinely good. But the issuance and crypto conversion fees are not published, there is no rewards information, ATM access is unaddressed, and eligibility depends on an unpublished list, so the value proposition cannot be fully evaluated before you order.

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