Circle Onramp Buy Crypto
Integrates Circle's hosted Onramp widget to enable fiat-to-crypto purchases via cards, bank transfers, Apple Pay, and Google Pay.
Streamlines the integration of Circle's hosted fiat-to-crypto Onramp widget using either the unified App Kit (@circle-fin/app-kit) or standalone Onramp Kit (@circle-fin/onramp-kit). It guides developers through authenticating server-side session minting to keep API keys secure, rendering checkout interfaces via inline iframes or popup windows, configuring CSP security and referrerDomain validation, and preparing for production Mainnet launch with required KYB approvals for card and mobile wallet payments.
Key Features
01Step-by-step production KYB and referrerDomain CSP configuration for cards
02Secure backend session minting to keep Circle API secrets off the client
03164 GitHub stars
04Dual SDK support for all-in-one App Kit and standalone Onramp Kit
05Flexible frontend mounting with inline iframes or popup window flows
06Dynamic token catalog support without hardcoded contract addresses
Use Cases
01Embedding an inline fiat-to-crypto purchase widget directly inside a web app
02Minting authenticated server sessions to fund user wallets with crypto purchases
03Configuring debit card, Apple Pay, and Google Pay processing with Circle KYB compliance