Build with Rampnow.
Let your users buy crypto with fiat and sell crypto for fiat without leaving your product. One integration covers both directions. Rampnow runs payments, KYC, liquidity, on-chain delivery and bank payouts.
blockchains tokensCards, bank transfers and local payment methods
Pick how you integrate
All three support buy and sell, and share the same order lifecycle, webhooks and sandbox. They differ in how much of the experience you build. Compare them side by side.
Widget
Least effort. Open Rampnow’s buy and sell flow with a URL or an iframe. Public key only, no backend.
SDK
For web apps. Open the same flow from JavaScript with
@rampnow/sdk. Adds browser events, open/close control and a React hook.Intent API
Most control. Build your own quote and checkout screens. Your backend creates signed orders and redirects users to Rampnow’s hosted checkout.
From sandbox to live
1. Get your keys
Your public key, API key and secret are in the Partner Dashboard under API Hub. No account yet? Contact support below.
2. Build and test in sandbox
Follow your integration’s quickstart, then drive orders to completed, failed or expired with the payment simulator.
3. Go live
Work through the go-live checklist, then ask support for production access.
Plan your launch
For product managers: where you can launch, what users see and what they can pay with.
Supported countries
Where your users can be based, and which countries are restricted.
Crypto and blockchains
Tokens users can buy and sell, and the chains they run on.
Payment methods and limits
How users pay on buy orders, how they get paid on sell orders, and the limits.
Fiat currencies
Currencies users can pay with on buy orders and receive on sell orders.
User flow
Every screen your users go through, from quote to delivery.
Why Rampnow
Coverage, liquidity routing and what Rampnow handles for you.
Build and operate
For developers: the references you will use most once the integration is running.
Webhooks
Payload, signature verification and retries for every order status change.
Order statuses
Every status an order moves through, and which ones are final.
Authentication
Sign Intent API requests with HMAC-SHA256. Examples in several languages.
Error codes
What each error means and which ones are safe to retry.
Postman collection
Call the Intent API from Postman, with signing set up for you.
Build with AI
Connect these docs to Claude, Cursor or ChatGPT.
Need help?
FAQ
Short answers to common integration and product questions.
Contact support
Integration questions, sandbox access and production keys.
Talk to sales
Pricing, coverage and partnership.
Also from Rampnow: crypto-to-crypto swaps and cross-chain transfers are available through Hypermid. Rampnow Wallet, custodial wallets for your users, is coming soon.