Pricing: one small fee per payment
No subscription, no setup fee, no monthly minimum. You pay only when a payment is made: 0.49% on the smallest payments, down to 0.01% above $100,000, and never more than $100.
The fee is never taken from the payment, so the receiver always gets the full amount. It is priced in USD when the payment is created and also shown in your own currency.
Fee schedule
| Payment amount (USD) | send21 fee |
|---|---|
| $0 to $10 | 0.49% |
| $10 to $50 | 0.39% |
| $50 to $100 | 0.29% |
| $100 to $500 | 0.19% |
| $500 to $2,000 | 0.14% |
| $2,000 to $10,000 | 0.09% |
| $10,000 to $50,000 | 0.04% |
| $50,000 to $100,000 | 0.02% |
| $100,000+ | 0.01% |
Minimum fee $0.01, maximum $100. The network fee is separate and set by the payer's own wallet.
For developers: the live schedule is at /api/v1/fees/schedule.
How the fee is collected
- Pay links, payment requests and single payments (on-chain or Lightning): the payer sends one normal payment for the exact amount. The fee is added to your send21 account when the payment confirms. You settle the balance in one payment, in BTC, USDC, USDT, EURC, SOL or ETH. Once the balance reaches $10 or the oldest fee is 30 days old, you settle it before you create new pay links or drafts.
- Drafts for PSBT and batching wallets: the fee is a separate output next to the payment, in the same transaction (on Ethereum and other EVM chains, a separate transfer that a Safe can batch). The sender sees it before signing, and nothing is billed later.
- Very small fees on Bitcoin PSBT drafts: a fee below the 546-sat dust limit is too small to send on-chain, so it is waived, up to 5 times a day. After that it is added to your account.
send21 never adds a spread to exchange rates. Payments priced in fiat use a locked market rate, and the rate, its source and the time are recorded on the payment.
Included for free
- Hosted pay pages with standard QR codes, in any supported currency
- Prices in any of 161 currencies with locked exchange rates
- REST API with scoped keys, safe retries and batches of 25 drafts per call
- MCP server for AI agents at
https://send21.io/mcp - Signed webhooks and email notifications
- Recurring payments (daily, weekly or monthly)
- Shopify connection through your own custom app, with reference code and setup help
Questions
Is there a monthly fee?
No. No subscription, no setup fee and no minimum. You pay only when a payment is made.
Who pays the network fee?
The payer, from their own wallet, as with any crypto transfer. send21 does not add to it.
Does send21 require KYC?
No. send21 never holds your money, so there is nothing to verify: you sign up with an email address. The rules that apply to your own business still apply to you.
How does that compare with other crypto payment providers?
See BitPay, NOWPayments, Coinbase and BTCPay Server compared.
Questions about volume or integrations? integration@send21.io | For business | Terms of service | Home