How to Buy SelfKey (KEY)
Every exchange we track that lists KEY, what the buy costs, and what it costs to take KEY with you afterwards.
11 of the exchanges we track list KEY, and 10 of those accept fiat, so you can buy it without holding crypto first. The cheapest place to place the order is Ourbit at $0.00 on a $1,000 market buy. It is also the cheapest once the withdrawal fee is added — $0.03 to buy $1,000 of KEY and move it to your own wallet. Every exchange sends KEY over Ethereum (ERC20), so there is no network to get wrong. 3 of them have KEY withdrawals paused right now — you can buy there, but you cannot take the coin with you until it reopens.
Networks KEY runs on
Where to buy KEY
All-in cost is the trading fee on a $1,000 market buy plus the cheapest fee that exchange charges to withdraw KEY. It is the number the exchange’s own “how to buy” page never shows you, and it reorders the table more often than not. The coins column is how many assets each exchange lists in total, from our own sync — not the figure CoinMarketCap prints.
| Exchange | Buy fee on $1,000 | Move it out | All-in cost | Coins listed | Buy |
|---|---|---|---|---|---|
 MEXCReferralPay with Card | $0.500–0.05% taker | FreeEthereum (ERC20) | $0.50 | 9,475 | Visit ↗ |
 BitgetReferralPay with Card, 3rd-party | $1.000.1% taker | $0.0₅94571.6 KEY · Ethereum (ERC20) | $1.00 | 2,516 | Visit ↗ |
 BinanceReferralPay with Card, Bank, Apple/Google Pay | $1.000.1% taker | withdrawals paused | — | 866 | Visit ↗ |
 OurbitPay with Bank | $0.000% taker | $0.029555,000 KEY · Ethereum (ERC20) | $0.03 | 1,980 | Visit ↗ |
 TapbitPay with Card, P2P | $1.000.1% taker | $0.004492760 KEY · Ethereum (ERC20) | $1.00 | 198 | Visit ↗ |
 BitunixPay with P2P | $1.000.1% taker | $0.029555,000 KEY · Ethereum (ERC20) | $1.03 | 993 | Visit ↗ |
 BitMartPay with Card, P2P, 3rd-party | $1.000.1% taker | $0.0681411,529 KEY · Ethereum (ERC20) | $1.07 | 3,695 | Visit ↗ |
 KrakenPay with Card, Bank, Apple/Google Pay | $8.000.01–0.8% taker | $0.583398,695.65 KEY · Ethereum (ERC20) | $8.58 | 697 | Visit ↗ |
 4ECrypto deposit only | — | $0.020693,500 KEY · Ethereum (ERC20) | — | 217 | Visit ↗ |
 KuCoinPay with Card | $1.000.1% taker | withdrawals paused | — | 2,147 | Visit ↗ |
 PionexPay with Card, P2P | $1.000.05–0.1% taker | withdrawals paused | — | 206 | Visit ↗ |
Showing 1–11 of 11 exchanges listing KEY
Buying KEY step by step
- Pick a venue from the table. For a coin this size the choice is usually short — 11 exchanges list KEY at all, and the table already shows what you will pay to leave as well as to buy.
- Fund the account. 10 of those exchanges take fiat, 8 of them by card. Card is fastest and dearest; a bank transfer costs a fraction of it. Depositing a stablecoin you already hold is free on almost every exchange here.
- Place the order. A market order pays the taker fee in the table; a limit order that rests on the book pays the lower maker fee. On a thinly traded coin the spread costs more than either, so a limit order is worth the wait.
- Decide whether to move it. Leaving KEY on the exchange is free but custodial. Moving it to a wallet that supports it costs one withdrawal fee, from $0.02955 — send a small test amount first, and match the network on both sides.
How to buy KEY — FAQ
Where can I buy SelfKey (KEY)?
On 11 exchanges we track: MEXC, Bitget, Binance, Ourbit, Tapbit and 6 more. The table above has each one with its trading fee, the payment methods it takes and what it charges to withdraw KEY.
What is the cheapest way to buy KEY?
Ourbit, at $0.03 to buy $1,000 of KEY and withdraw it — $0.00 in trading fee plus $0.02955 to move it out over Ethereum (ERC20). If you are leaving the coin on the exchange, only the first half applies and a different venue may win. Paying by card adds the card processor's charge on top of both, typically 1.8–4%.
Can I buy KEY with a credit card?
Indirectly, yes. 8 of the exchanges listing KEY accept a card, but the card almost always buys a major asset — USDT, USDC, BTC — which you then swap for KEY on the same exchange. That means two fees: the card charge, then the trading fee in the table.
Do I have to pay a fee to withdraw KEY?
Yes, and it is worth checking before you choose where to buy. It is a flat amount of KEY, set by each exchange per network, so it does not scale with the size of your purchase — the cheapest in the table is $0.02955 on Ourbit. Our full KEY withdrawal fee table compares every exchange and every network.
Is it safe to leave KEY on the exchange?
It is a custody choice, not a safety switch. While the coin sits there the exchange holds the keys: convenient, recoverable if you lose your password, and dependent on the exchange staying solvent and keeping withdrawals open. Moving it to a wallet you control removes that dependency and costs one withdrawal fee — from $0.02955 for KEY. For a trading balance, staying put is reasonable; for a long hold, most people move.
Exchange coverage for KEY comes from each exchange’s own deposit and withdrawal endpoints (last sync 2026-08-29 00:53 UTC); trading fees are the published base tier, no volume discount applied (verified 2026-08-28). Exchanges we have a referral arrangement with appear first and are tagged as such — it changes no number in any row. Nothing here is investment advice; see our methodology.