The app is 0%. The API is 0.3% per transaction, capped at $5. No setup fee, no monthly minimum, no charge for wallets, webhooks or the sandbox — you pay only when a deposit converts to naira.
0%
on conversion and on bank withdrawal. The live open-market rate you see before you convert is the rate you are paid. The only third-party cost is the blockchain network fee on your deposit — that goes to the network, not to Monica.
0.3%capped at $5 / transaction
deducted before settlement and itemised on every deposit and settlement
object as fee_ngn, so reconciliation is exact. The cap means your effective
rate falls as transactions grow.
Drag the slider. The fee is 0.3% until the $5 cap takes over at $1,666.67 — after that, the bigger the transaction, the smaller your effective rate.
The cap is saving you $0 on this transaction versus an uncapped 0.3%.
Naira figures use the live USDT/NGN rate — currently ₦1,364/$. Indicative only: the binding rate is always the one locked at on-chain confirmation, returned on the deposit object.
| Transaction | API fee | Effective rate |
|---|---|---|
| $100 | $0.30 | 0.30% |
| $500 | $1.50 | 0.30% |
| $1,666.67 | $5.00 | 0.30% — the cap starts here |
| $5,000 | $5.00 | 0.10% |
| $20,000 | $5.00 | 0.025% |
| $100,000 | $5.00 | 0.005% |
The cap is applied per transaction as the naira
equivalent of $5 at the locked rate, and every fee is itemised as fee_ngn.
Yes — 0% on conversion and 0% on naira withdrawal. The live open-market rate shown before you convert is the rate you are paid. The only cost that exists is the blockchain network fee on your deposit, which goes to the network, not to Monica.
Only when a deposit converts. The 0.3% (capped at $5) is deducted before settlement:
ngn_amount is the gross conversion at the locked rate, fee_ngn is the
fee, and net_ngn is what lands in your corporate account.
As the naira equivalent of $5 at the rate locked on confirmation of that deposit. On a $10,000 transaction the fee is $5 — an effective 0.05% — not $30.
No tiers, no minimums, no setup fee. One flat rule at any volume — the cap already gives large transactions a better effective rate automatically.
No. Sandbox keys are free, work identically to production against testnet coins, and settlements post to a virtual ledger — no real bank movement, no real crypto.
Email [email protected] with your company name, RC number, website, expected monthly volume and settlement account. Most KYB reviews complete within two business days, and most integrations go live within a week.
Sandbox keys are free, and most integrations go live within a week of KYB approval.