How to Buy Onigiri (ONI)
Every exchange we track that lists ONI, what the buy costs, and what it costs to take ONI with you afterwards.
ONI is thin on the ground: exactly one exchange we track lists it, MEXC. With a single venue there is nothing to compare on price, so the thing worth checking is whether withdrawals are open before you buy. The cheapest place to place the order is MEXC at $0.50 on a $1,000 market buy. It is also the cheapest once the withdrawal fee is added — $0.50 to buy $1,000 of ONI and move it to your own wallet. Every exchange sends ONI over ONINO, so there is no network to get wrong.
Networks ONI runs on
Where to buy ONI
All-in cost is the trading fee on a $1,000 market buy plus the cheapest fee that exchange charges to withdraw ONI. 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 | $0.0₆33722 ONI · ONINO | $0.50 | 9,475 | Visit ↗ |
Showing 1–1 of 1 exchange listing ONI
Buying ONI step by step
- Pick a venue from the table. For a coin this size the choice is usually short — 1 exchange lists ONI at all, and the table already shows what you will pay to leave as well as to buy.
- Fund the account. 1 of those exchanges takes fiat, 1 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 ONI on the exchange is free but custodial. Moving it to a wallet that supports it costs one withdrawal fee, from $0.0₆3372 — send a small test amount first, and match the network on both sides.
How to buy ONI — FAQ
Where can I buy Onigiri (ONI)?
On 1 exchange we track: MEXC. The table above has its trading fee, the payment methods it takes and what it charges to withdraw ONI.
What is the cheapest way to buy ONI?
MEXC, at $0.50 to buy $1,000 of ONI and withdraw it — $0.50 in trading fee plus $0.0₆3372 to move it out over ONINO. 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 ONI with a credit card?
Indirectly, yes. 1 of the exchanges listing ONI accepts a card (MEXC), but the card almost always buys a major asset — USDT, USDC, BTC — which you then swap for ONI 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 ONI?
Yes, and it is worth checking before you choose where to buy. It is a flat amount of ONI, set by each exchange per network, so it does not scale with the size of your purchase — the cheapest in the table is $0.0₆3372 on MEXC. Our full ONI withdrawal fee table compares every exchange and every network.
Is it safe to leave ONI 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 $0.0₆3372 for ONI. For a trading balance, staying put is reasonable; for a long hold, most people move.
Exchange coverage for ONI 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.