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.

Circle also offers developer services including Cross-Chain Transfer Protocol (CCTP), smart contract wallets, payment gateways, and gasless transaction infrastructure for building on-chain applications 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: Programmable wallets with built-in security and recovery features, compatible with Avalanche.
Gasless Transactions (Paymaster): Sponsor gas fees for users on Avalanche so they don't need AVAX to get started.
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 thorough documentation.

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.
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 guides, API references, and SDK documentation, visit:

Use Cases on Avalanche

Common ways developers use Circle 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: Use CCTP to build applications that move USDC 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

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