Crypto Checkout Widget for E-Commerce
Accept USDT and USDC payments on any website with a non-custodial crypto checkout. Embed in minutes, settle instantly on Base, optional escrow protection.
What is a Crypto Checkout?
A crypto checkout is an embedded payment flow that lets customers pay with cryptocurrency directly on your website — no redirects to a separate processor, no merchant account, no chargebacks. The Palindrome Pay crypto checkout widget drops into any e-commerce site with a few lines of JavaScript and accepts USDT and USDC stablecoins on Base.
How the Crypto Checkout Widget Works
Add the SDK to your site, configure your wallet address and amount, and the Pay with Crypto button appears. Customer clicks Pay, connects their wallet (MetaMask, WalletConnect, Coinbase Wallet), confirms the transaction, and funds move to your wallet — or to an escrow smart contract if you enable escrow protection. The whole flow takes 15-30 seconds.
Crypto Checkout vs Traditional Payment Gateway
Traditional payment gateways (Stripe, PayPal) charge 2.9-3.5% per transaction, hold funds for days, and can freeze accounts or reverse charges. A crypto checkout settles in minutes on Base for sub-cent gas fees, has no chargebacks, and is non-custodial — neither Palindrome Pay nor any other party can touch the funds. The trade-off: your customer needs a crypto wallet and stablecoins, but for crypto-native buyers this is a feature, not a bug.
Integration: Embed in Any Website
The Palindrome Pay JavaScript SDK works on any web stack — Shopify, WooCommerce, Webflow, custom React or Next.js sites, plain HTML. Drop in a script tag, configure the recipient wallet and product details, render the Pay button. No backend changes required for the basic flow. Full SDK documentation and code examples available at sdk.palindromepay.com.
Supported Tokens and Chain
The crypto checkout supports USDT (Tether) and USDC (Circle) on Base — Coinbase's Layer 2 network with sub-cent gas fees and near-instant confirmations. Stablecoins eliminate price volatility for both you and your customer: a $100 sale stays worth $100 from the moment the customer pays to the moment you withdraw.
Fees and Settlement
Palindrome Pay charges 1% per transaction. Standard Base network gas fees apply — typically a few cents per transaction. Every wallet address is screened in real time against sanctions and on-chain threat-intelligence databases — phishing, theft, mixer and laundering indicators — and flagged addresses are blocked. Onboarding is wallet-based: no account and no business documents. No monthly subscriptions, no setup fees, no hidden charges.
Non-Custodial Escrow Protection
Optionally route checkout payments through Palindrome Pay's 2-of-3 multisig smart contract escrow. Buyer protection: funds locked until delivery confirmed. Seller protection: funds release on buyer confirmation. Best for high-value transactions, marketplace flows, or B2B deals where both parties want assurance before fulfillment.
Who Uses the Crypto Checkout Widget
E-commerce stores selling internationally, SaaS companies billing in USDT, digital product creators (courses, ebooks, memberships), high-value goods sellers (electronics, art, collectibles), freelance marketplaces, and B2B services with global clients. Anywhere traditional card payments are slow, expensive, or unreliable, a crypto checkout outperforms.