Circle | Avalanche Builder Hub

Overview

Circle is a global financial technology company that provides payment infrastructure for the digital economy. Circle issues USDC and EURC, two of the most trusted and widely-used stablecoins, which are fully regulated digital currencies backed 1:1 by cash and short-term U.S. Treasury bonds. USDC is natively available on Avalanche C-Chain, enabling fast, low-cost transactions for payments, DeFi, and enterprise applications.

Beyond stablecoins, Circle offers a comprehensive suite of developer services including Cross-Chain Transfer Protocol (CCTP), smart contract wallets, payment gateways, and gasless transaction infrastructure that enable developers to build seamless on-chain experiences on Avalanche.

Features

Regulated Stablecoins: USDC and EURC are issued by Circle and regulated by U.S. financial authorities, providing trust and transparency.
Native Avalanche Support: USDC is natively available on Avalanche C-Chain for fast, low-cost transactions.
Cross-Chain Transfer Protocol (CCTP): Transfer USDC natively between Avalanche and other supported chains without wrapped tokens or liquidity pools.
Smart Contract Wallets: Enterprise-grade programmable wallets with built-in security and recovery features compatible with Avalanche.
Gasless Transactions (Paymaster): Sponsor gas fees for users on Avalanche, enabling seamless onboarding experiences.
Payment Gateway: Accept USDC payments on Avalanche with Circle's payment APIs and convert to fiat if needed.
Minting and Redemption Services: Institutional access to mint and redeem USDC directly with Circle.
Developer SDKs: Official SDKs for integrating Circle services into your Avalanche applications.
Testnet Support: Free testnet USDC from Circle's faucet for development and testing on Avalanche Fuji testnet.
Transparent Reserves: Monthly attestations from independent accounting firms verify 1:1 backing.
API-First Design: RESTful APIs with comprehensive documentation for easy integration.

Getting Started

To integrate Circle USDC into your Avalanche application:

Get Testnet Tokens: Visit the Circle Faucet to get free testnet USDC for development on Avalanche Fuji.
Understand USDC on Avalanche: USDC uses a 6-decimal precision token standard on Avalanche C-Chain. You can interact with it using standard Web3 libraries like viem, ethers.js, or web3.js.
Implement USDC Transfers: Use the USDC smart contract on Avalanche to send and receive payments in your application.
Integrate Cross-Chain Transfers: Use Circle's Cross-Chain Transfer Protocol (CCTP) to move USDC between Avalanche and other supported chains seamlessly.
Set Up Webhooks: Configure webhooks to receive real-time notifications about USDC transactions and user activities.

USDC on Avalanche

Avalanche C-Chain Mainnet: 0xB97EF9Ef8734C71904D8002F8b6Bc66Dd9c48a6E

For testnet addresses, see the USDC Contract Addresses documentation.

Documentation

For comprehensive guides, API references, and SDK documentation, visit:

Use Cases on Avalanche

Circle's infrastructure enables a wide range of blockchain applications on Avalanche:

Payment Applications: Build payment apps on Avalanche that accept USDC for instant, low-cost global transfers.

DeFi Platforms: Use USDC as a stable trading pair, collateral, or yield-generating asset in Avalanche DeFi protocols.

NFT Marketplaces: Accept USDC payments for NFTs on Avalanche, providing price stability and easier accounting.

Cross-Chain Applications: Leverage CCTP to build applications that move USDC seamlessly between Avalanche and other blockchains.

Web3 Gaming: Use USDC for in-game purchases, rewards, and player-to-player trading on Avalanche with real-world value.

Remittance Services: Enable fast, low-cost international money transfers using USDC on Avalanche.

Merchant Solutions: Accept USDC payments from customers on Avalanche with instant settlement and optional fiat conversion.

Enterprise Treasury: Use USDC on Avalanche for corporate treasury management, payroll, and B2B payments.

Pricing

Circle offers transparent pricing for its services:

USDC Transfers:

On-chain transfers pay only network gas fees
No Circle fees for basic USDC transfers between wallets

Institutional Services:

Circle Mint: 0.03% fee for minting and redeeming USDC (institutional accounts)
Minimum fees and volume requirements apply

Developer Services:

Smart Contract Wallets: Pricing based on wallet creation and transaction volume
Paymaster (Gas Sponsorship): Pay-as-you-go based on gas costs sponsored
Circle APIs: Free tier available, paid plans for higher volume

CCTP:

Free to use protocol
Only pay standard gas fees on source and destination chains

For enterprise pricing and custom arrangements, contact Circle's sales team.

Circle Developer Resources

Testnet Faucet: Get free testnet USDC at faucet.circle.com
Developer Discord: Join the Circle Discord to connect with other developers
Developer Grants: Apply for grants to build innovative applications with Circle's technology
Sample Applications: Explore open-source demos and reference implementations
Circle Research: Access whitepapers and technical research on stablecoin technology

Conclusion

Circle provides the essential infrastructure for building the next generation of financial applications on Avalanche. With USDC and EURC as trusted digital dollar and euro equivalents, combined with enterprise-grade developer tools like CCTP, smart contract wallets, and gasless transactions, Circle enables developers to create seamless user experiences on Avalanche that bridge traditional finance and blockchain technology. Whether you're building a payment app, DeFi protocol, NFT marketplace, or enterprise solution on Avalanche, Circle's regulated stablecoins and developer services provide a solid foundation for innovation in the programmable internet economy.

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