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Circle Products & Developer Toolings

Looking for a head start? We've been publishing a growing collection of open-source sample applications that demonstrate real-world use cases powered by USDC, Arc, Circle Wallets, Gateway, and related developer tools. These projects are designed to be forked, customized, and used as starting points for your own applications.

Below is a quick overview of what each sample app is for…

https://github.com/circlefin/arc-nanopayments

Demonstrate gasless USDC nanopayments using 

 on Arc. A LangChain agent acts as the buyer, autonomously paying for paywalled resources, while a Next.js web app acts as the seller, exposing x402-protected endpoints and providing a seller dashboard to monitor payments and withdraw earnings.

Circle Gateway batches many signed offchain authorizations into a single onchain settlement, enabling economically viable sub-cent payments.

https://github.com/circlefin/arc-p2p-payments

Modern peer-to-peer payment system. This sample application uses Next.js, Supabase, and Circle Modular Wallets with Passkey security to demonstrate a seamless, gasless P2P payment system on the Arc Network.

Modern multi-chain treasury management system. This sample application uses Next.js, Supabase, and Circle Developer Controlled Wallets, Circle Gateway and Circle Bridge Kit with Forwarding Service to demonstrate a multi-chain treasury management system with bridge capabilities.

Automate escrow-backed freelance agreements with AI-powered work validation using USDC on Arc testnet. This sample application uses Next.js, Supabase, Circle Developer Controlled Wallets, and OpenAI to demonstrate an end-to-end escrow workflow — from contract creation and deposit, through AI-validated deliverable submission, to fund release or refund.

https://github.com/circlefin/arc-multichain-wallet

A sample application demonstrating how to build optimal USDC interoperability UX for wallets using Arc and Circle Gateway. This app showcases unified balance management, deposits, and cross-chain transfers across multiple EVM chains using Next.js and Supabase.

https://github.com/circlefin/arc-commerce

Integrate USDC as a payment method for purchasing credits on Arc. This sample application uses Next.js, Supabase, and Circle Developer Controlled Wallets to demonstrate a credit purchase flow with USDC payments on Arc testnet.

Share what you've built with these sample apps below!

🚀 Arc Sample App Directory

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