Crypto Payment Processing Platform

Loop provides comprehensive crypto payment infrastructure enabling merchants and billing platforms to accept cryptocurrency and stablecoin payments across all use cases—from one-time purchases to recurring subscriptions. The platform combines payment gateway APIs, embeddable widgets, hosted checkout pages, invoicing, and subscription management.

Payment Gateway API

Loop's payment API suite provides billing platforms and payment processors with tools to integrate cryptocurrency payments into existing infrastructure. The API handles blockchain complexities including wallet connections, network configurations, and secure transactions.

Transaction Processing: Facilitates complete payment flow from customer authorization to on-chain settlement. Performs authorization checks, executes transactions from customer to merchant wallet, and sends real-time notifications.

Multi-Network Support: Supports all EVM (Ethereum Virtual Machine) chains and Solana, with defaults including Solana, Optimism, Base, Polygon, Arbitrum, Ethereum, and BNB Smart Chain. Merchants can add any EVM network from 300+ available networks.

Token Flexibility: Supports all ERC-20 tokens, SPL tokens, and native tokens. CoinMarketCap price feed integration enables fiat-denominated pricing with crypto acceptance.

Payment Method Management: Securely stores customer payment methods for recurring payments and one-click checkouts. Pre-authorization queries troubleshoot issues before they occur.

Payment Components and Widgets

Embeddable payment components provide customizable, white-label interfaces integrating into merchant websites and applications.

Pay Component: Complete UI for wallet connection, token selection, network configuration, and transaction signing. Embeds seamlessly into existing checkout flows.

Wallet Integration: Supports 500+ wallets including MetaMask, Coinbase Wallet, and Rainbow. Compatible with non-custodial, MPC, and smart wallets.

Smart Checkout: Remembers customer preferences for returning users. Surfaces saved payment methods enabling one-click payments and reducing cart abandonment.

Customization: Complete brand control with customizable styling, theming, color schemes, fonts, and layouts while maintaining security standards.

Hosted Payment Links

Generate secure, shareable links directing customers to Loop-hosted checkout pages—no coding required. Perfect for merchants wanting crypto payment acceptance without technical integration.

Invoicing System

Send professional invoices accepting cryptocurrency and stablecoin payments with automated tracking, reminders, and instant reconciliation.

Pay-with-Crypto Links: Include crypto payment link in invoices. Customers connect wallets and complete payments securely.

Automated Notifications: Automatic receipts and confirmations when payments received. Webhook notifications for automated accounting workflows.

Instant Reconciliation: Automatically matches payments to invoices with complete on-chain transaction history.

Subscription Payment Processing

Enables true autopay functionality for crypto payments. Customers authorize wallet once; Loop automatically processes payments each billing cycle.

Automated Recurring Payments: Pulls funds from customer wallet each billing period. Provides credit card autopay convenience with blockchain cost savings.

Authorization Management: Single authorization transaction grants permission to charge wallet for specific amounts and tokens. Customers manage, update, or revoke anytime.

Flexible Billing Models: Supports flat-rate subscriptions, usage-based billing, tiered pricing, add-on fees, overages, and hybrid models.

Failed Payment Handling: Dunning management notifies customers of insufficient balance, retries failed payments, sends merchant webhooks, and continues attempting payment.

Platform Integrations

Stripe Integration: Native integration adds crypto acceptance to Stripe infrastructure. Manage fiat and crypto payments from Stripe dashboard with unified customer records and subscription management.

OpenPay Integration: Adds crypto capabilities to OpenPay billing platform. Manage subscriptions accepting both fiat and crypto payments.

Business Benefits

Designed to integrate seamlessly with existing billing systems using endpoints mirroring traditional payment rails. Payment providers deploy in weeks, offering merchants crypto capabilities without rebuilding infrastructure. Platform abstracts crypto complexities making it accessible for platforms without blockchain expertise.