About CryptumPay
CryptumPay is a crypto payment service for online businesses. We’re making payments simple on both sides — for the buyer and for the merchant.
We’re a team of developers with deep experience in crypto payments.
Working in this field, we saw the same two problems again and again:
01
Any slip in the amount — an underpayment or an overpayment — turned into a support thread
02
The payment sent the buyer away from the merchant’s site to the payment gateway page, distracts them and they may change their mind about paying
In June 2026, we launched CryptumPay to fix both.
A wrong amount is sorted out right in the checkout, with no support tickets on the merchant’s side.
Shows the buyer how much is left to pay
Returns any excess at the buyer’s request
Opens right over the merchant’s site
Everything else a merchant needs works too: connection through the API, notifications at every step of a payment, invoices as a single link and withdrawals at any time.
One-click payment: the buyer pays with crypto once, and after that it works like a saved card.
To get there, we’re developing a mobile app for buyers. It stores the payment method in a smart contract, right on the blockchain, and keeps all their subscriptions in one place. The buyer confirms every payment with their face or fingerprint.
For the buyer — link a wallet and pay in one click.
For the merchant — higher conversion on repeat payments, because paying gets simpler.
Open-source Node.js SDK
github.com/cryptumpay
Widget and API documentation
docs.cryptumpay.comIs the service up right now?
status.cryptumpay.com