# Contracts

The USDCx smart contract is deployed on Stacks. It's role mirrors native USDC behavior and verifies Circle’s deposit attestations for minting and emits burn events for redemption.

Below are the integral contracts that make up the USDCx architecture.

### Stacks

<table><thead><tr><th width="125.3046875">Network</th><th>USDCx token contract</th><th>USDC xReserve protocol (entrypoint)</th></tr></thead><tbody><tr><td>Mainnet</td><td><a href="https://explorer.hiro.so/txid/0x07ea0a8d7262acd0cb094006969527351883281e08ebb6535843c5dbbde31ce9?chain=mainnet">SP120SBRBQJ00MCWS7TM5R8WJNTTKD5K0HFRC2CNE.usdcx</a></td><td><a href="https://explorer.hiro.so/txid/0xb5f29114ecdbaf199887433cdd4ca46d177d60875141e1dfb67304b53bf2df11?chain=mainnet">SP120SBRBQJ00MCWS7TM5R8WJNTTKD5K0HFRC2CNE.usdcx-v1</a></td></tr><tr><td>Testnet</td><td><a href="https://explorer.hiro.so/txid/ST1PQHQKV0RJXZFY1DGX8MNSNYVE3VGZJSRTPGZGM.usdcx?chain=testnet">ST1PQHQKV0RJXZFY1DGX8MNSNYVE3VGZJSRTPGZGM.usdcx</a></td><td><a href="https://explorer.hiro.so/txid/ST1PQHQKV0RJXZFY1DGX8MNSNYVE3VGZJSRTPGZGM.usdcx-v1?chain=testnet">ST1PQHQKV0RJXZFY1DGX8MNSNYVE3VGZJSRTPGZGM.usdcx-v1</a></td></tr></tbody></table>

### Ethereum

<table><thead><tr><th width="103.1875">Network</th><th>USDC token contract</th><th>xReserve contract</th></tr></thead><tbody><tr><td>Mainnet</td><td><a href="https://etherscan.io/token/0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48">0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48</a></td><td><a href="https://etherscan.io/address/0x8888888199b2Df864bf678259607d6D5EBb4e3Ce">0x8888888199b2Df864bf678259607d6D5EBb4e3Ce</a></td></tr><tr><td>Testnet</td><td><a href="https://sepolia.etherscan.io/token/0x1c7D4B196Cb0C7B01d743Fbc6116a902379C7238">0x1c7D4B196Cb0C7B01d743Fbc6116a902379C7238</a></td><td><a href="https://sepolia.etherscan.io/address/0x008888878f94C0d87defdf0B07f46B93C1934442">0x008888878f94C0d87defdf0B07f46B93C1934442</a></td></tr></tbody></table>