How to Buy Polyhedra Network (ZKJ)
Every exchange we track that lists ZKJ, what the buy costs, and what it costs to take ZKJ with you afterwards.
23 of the exchanges we track list ZKJ, and 21 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 — $0.00 to buy $1,000 of ZKJ and move it to your own wallet. ZKJ moves over 2 networks (Ethereum (ERC20), BNB Smart Chain (BEP20)) — pick the same one on the exchange withdrawal screen and in your wallet. 3 of them have ZKJ withdrawals paused right now — you can buy there, but you cannot take the coin with you until it reopens.
Networks ZKJ runs on
Where to buy ZKJ
All-in cost is the trading fee on a $1,000 market buy plus the cheapest fee that exchange charges to withdraw ZKJ. 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 | $0.323858 ZKJ · Ethereum (ERC20) | $0.82 | 9,475 | Visit ↗ |
 BitgetReferralPay with Card, 3rd-party | $1.000.1% taker | $0.0044660.8000 ZKJ · Ethereum (ERC20) | $1.00 | 2,516 | Visit ↗ |
 BinanceReferralPay with Card, Bank, Apple/Google Pay | $1.000.1% taker | $0.0055831 ZKJ · BNB Smart Chain (BEP20) | $1.01 | 866 | Visit ↗ |
 OKXReferralPay with Card | $1.000.1% taker | $0.127522.84 ZKJ · Ethereum (ERC20) | $1.13 | 411 | Visit ↗ |
 GateReferralPay with Card | $1.000.1% taker | $1.01181.23 ZKJ · Ethereum (ERC20) | $2.01 | 2,059 | Visit ↗ |
 OurbitPay with Bank | $0.000% taker | $0.0025120.4500 ZKJ · BNB Smart Chain (BEP20) | $0.00 | 1,980 | Visit ↗ |
 KCEXPay with Card, 3rd-party | $0.000% taker | $0.184733.09 ZKJ · Ethereum (ERC20) | $0.18 | 908 | Visit ↗ |
 CoinWPay with Card, Apple/Google Pay, 3rd-party | $1.000.1% taker | FreeEthereum (ERC20) | $1.00 | 1,218 | Visit ↗ |
 BitunixPay with P2P | $1.000.1% taker | $0.027925 ZKJ · Ethereum (ERC20) | $1.03 | 993 | Visit ↗ |
 Backpack ExchangePay with Bank | $1.000.1% taker | $0.0630911.3 ZKJ · Ethereum (ERC20) | $1.06 | 6,485 | Visit ↗ |
 HashKey GlobalCrypto deposit only | $1.200.12% taker | $0.0558310 ZKJ · Ethereum (ERC20) | $1.26 | 115 | Visit ↗ |
 KuCoinPay with Card | $1.000.1% taker | $0.502590 ZKJ · Ethereum (ERC20) | $1.50 | 2,147 | Visit ↗ |
 Biconomy.comPay with Card, P2P, 3rd-party | $1.000.1% taker | $0.7816140 ZKJ · Ethereum (ERC20) | $1.78 | 990 | Visit ↗ |
 DigiFinexPay with Card, P2P | $2.000.2% taker | $0.0₅33500.0006000 ZKJ · Ethereum (ERC20) | $2.00 | 1,009 | Visit ↗ |
 KTXCrypto deposit only | $2.000.2% taker | $0.0558310 ZKJ · Ethereum (ERC20) | $2.06 | 220 | Visit ↗ |
 CoinExPay with P2P, 3rd-party | $2.000.2% taker | $0.0670012 ZKJ · Ethereum (ERC20) | $2.07 | 1,018 | Visit ↗ |
 BitruePay with Card | $2.800.098–0.28% taker | $0.8040144 ZKJ · Ethereum (ERC20) | $3.60 | 1,784 | Visit ↗ |
 Crypto.com ExchangePay with Bank | $5.000.5% taker | $0.0766613.73 ZKJ · Ethereum (ERC20) | $5.08 | 462 | Visit ↗ |
 BitMartPay with Card, P2P, 3rd-party | $1.000.1% taker | $4.22756 ZKJ · Ethereum (ERC20) | $5.22 | 3,695 | Visit ↗ |
 HitBTCCrypto deposit only | $2.500.1875–0.25% taker | $25.534,573 ZKJ · Ethereum (ERC20) | $28.03 | 1,786 | Visit ↗ |
 OrangeXPay with Card, Bank, Apple/Google Pay | $1.000.1% taker | withdrawals paused | — | 599 | Visit ↗ |
 WEEXPay with Card, P2P | $1.000.1% taker | withdrawals paused | — | 594 | Visit ↗ |
 HibtPay with P2P | $2.000.2% taker | withdrawals paused | — | 1,721 | Visit ↗ |
Showing 1–23 of 23 exchanges listing ZKJ
Buying ZKJ step by step
- Pick a venue from the table. For a coin this size the choice is usually short — 23 exchanges list ZKJ at all, and the table already shows what you will pay to leave as well as to buy.
- Fund the account. 21 of those exchanges take fiat, 14 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 ZKJ on the exchange is free but custodial. Moving it to a wallet that supports it costs one withdrawal fee, from $0.002512 — send a small test amount first, and match the network on both sides.
How to buy ZKJ — FAQ
Where can I buy Polyhedra Network (ZKJ)?
On 23 exchanges we track: MEXC, Bitget, Binance, OKX, Gate and 18 more. The table above has each one with its trading fee, the payment methods it takes and what it charges to withdraw ZKJ.
What is the cheapest way to buy ZKJ?
Ourbit, at $0.00 to buy $1,000 of ZKJ and withdraw it — $0.00 in trading fee plus $0.002512 to move it out over BNB Smart Chain (BEP20). 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 ZKJ with a credit card?
Indirectly, yes. 14 of the exchanges listing ZKJ accept a card, but the card almost always buys a major asset — USDT, USDC, BTC — which you then swap for ZKJ 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 ZKJ?
Yes, and it is worth checking before you choose where to buy. It is a flat amount of ZKJ, set by each exchange per network, so it does not scale with the size of your purchase — the cheapest in the table is $0.002512 on Ourbit. Our full ZKJ withdrawal fee table compares every exchange and every network.
Is it safe to leave ZKJ 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 $0.002512 for ZKJ. For a trading balance, staying put is reasonable; for a long hold, most people move.
Which network should I use for ZKJ?
ZKJ is issued on 2 networks and they are not interchangeable — ZKJ sent over Ethereum (ERC20) will not arrive at an address on BNB Smart Chain (BEP20). Ethereum (ERC20) is the one most exchanges use (19 of them). Withdrawal fees differ per network too, sometimes by an order of magnitude, so the cheapest network is worth checking as well as the cheapest exchange.
Exchange coverage for ZKJ comes from each exchange’s own deposit and withdrawal endpoints (last sync 2026-08-29 00:57 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.