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100+ fiat currencies, worldwide
From PIX in Brazil to SEPA in Europe to Faster Payments in the UK — the rails users actually use.
100+ fiat currencies · Worldwide coverage
Onramp — fiat-to-crypto for your platform.
Let users fund their accounts in local currency — fiat lands, crypto is credited. No exchange. No friction.
Built for the moment of intent
Onramp lowers the barrier between a user wanting to act and being able to. Every choice in the product is in service of that drop in friction.
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Local payment methods
Users pay the way they're used to, through familiar channels in their own market.
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Live in minutes
Embed the widget or call the API — no heavy integration, no design work required.
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Transparent fees
Clear commission splits, no hidden costs. What you quote is what users see.
Onramp integration options
Two ways to plug it in.
Pick the integration that fits your team — same payment infrastructure, different levels of control.
01 / ONRAMP WIDGET
Minimum codeEmbed it. Done.
An embeddable payment interface that works on both web and mobile. Users complete the purchase without leaving your platform — no design work required, all key payment methods supported out of the box.
A fintech app drops the widget into its top-up screen. The user enters €500, pays with Apple Pay, and USDT lands in their app balance in under a minute.
Learn more 
02 / ONRAMP API
Full controlYour flow. Our rails.
Build your own flow on top of Calypso infrastructure. Full customization of the user experience, your own interface and payment flow, webhooks for all transaction events: success, failure, expiration, adjustment.
Create a fiat order via API: select region and currency, retrieve payment methods and rates, submit an order — the system processes payments asynchronously.
Learn more 
Six places where Onramp belongs
Anywhere your users want to do something with crypto but don't have any yet — that's where Onramp earns its keep.
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Crypto exchanges & wallets
Let users fund accounts without leaving your app.
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iGaming platforms
Turn fiat deposits into crypto balances instantly.
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NFT & GameFi projects
Enable token purchases at the moment of intent.
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Web3 & DeFi platforms
Onboard users who don't hold crypto yet.
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Fintech apps
Add crypto buying as a native feature.
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Payment aggregators
Extend your stack with a fiat-to-crypto layer.
Cards, transfers, and the local rails that matter.
Covering the markets that matter most — from card networks everyone knows to country-specific rails that everyone uses.
Global · Card
Visa
Global · Card
Mastercard
EU · Bank
SEPA
UK · Bank
Faster Payments
Brazil · Bank
PIX
Global · Wallet
Apple Pay
Global · Wallet
Google Pay
India · Bank
UPI
Mexico · Bank
SPEI
Nigeria · Bank
NIBSS
Philippines · Wallet
GCash
All regions
+ 80 more
Frequently Asked Questions
Find answers to common questions about Calypso Pay
What is fiat-to-crypto onramp?
A fiat-to-crypto onramp is a payment processor that converts traditional currencies like USD or EUR into cryptocurrencies such as USDT, BTC, or ETH. It removes the need for users to register on an exchange or manage wallets manually.
Where is Onramp available?
Calypso Pay Onramp is available worldwide, excluding sanctioned jurisdictions. We support 100+ fiat currencies and local payment methods across all major regions.
What is the Onramp widget?
The Onramp widget is an embedded payment interface that can be placed directly on a merchant's website or inside a mobile app. Users complete the purchase without leaving the platform. The widget is launched via a URL with parameters like merchant account, currency, and transaction details.
How does Onramp work technically?
A fiat order is created via API: select a supported region and currency, retrieve available payment methods and rates, submit an order request. Upon success, a payment URL is generated for the user. The system processes payments asynchronously and triggers webhooks for all events — success, failure, expiration, adjustment.
How much does Onramp cost?
Calypso Pay charges a transaction fee based on your volume. Custom pricing is available for high-volume clients. Contact sales for a tailored offer.
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