USDCx

Overview

USDCx is a digital US dollar that lives on Cardano. Every coin is backed one-for-one by USDC, the established dollar token issued by Circle, which sits locked in a smart contract (self-executing code) on the Ethereum blockchain. That backing keeps the value of one USDCx close to one US dollar¹².

There are two companies working together. Circle issues USDC and holds the dollar reserves (the locked USDC that backs every USDCx) on Ethereum through a product called xReserve. Input Output Global, the team that builds Cardano's core software, runs the Cardano side, including the bridge that moves dollars between the two chains³⁴. A bridge is the software that lets value travel from one blockchain to another.

Key Features

• A steady dollar value on Cardano. USDCx tracks the US dollar because Circle keeps an equal amount of USDC locked in reserve on Ethereum². People use it to hold savings, price goods, or set up predictable payments without leaving Cardano.
• Move dollars across more than 20 chains. Send USDC in from another blockchain or a centralized exchange and the bridge mints (creates) the same amount of USDCx into your Cardano wallet. The same flow works in reverse: burning (destroying) USDCx releases USDC back out to the chain of your choice¹.
• Two public security audits. The xReserve smart contracts have been reviewed by ChainSecurity⁵ and OtterSec⁶, two independent firms that inspect blockchain code for bugs. Both reports are published in full.
• Backed by signed proofs, not a third-party bridge. Each crosschain transfer is verified by signed attestations (cryptographic receipts) from Circle's own xReserve service³. That removes a separate bridge company from the chain of trust, which is the part many users worry about with wrapped tokens.
• Live on Cardano's main apps from day one. Launch-day support includes Liqwid for lending and borrowing, plus Minswap and SundaeSwap for swaps and liquidity pools⁷. USDCx is usable across the main DeFi apps on Cardano right away.

What to Expect

Most people will use USDCx through the bridge interface at usdcx.iog.io. The site walks you through sending USDC in from an exchange or another chain, signing a transaction, and receiving USDCx in your Cardano wallet. After that, USDCx behaves like any other Cardano token: you can send it to friends, swap it on a decentralized exchange, or supply it to a lending market.

Developers building Cardano apps can plug USDCx in as a stable settlement currency. Circle's developer documentation explains the attestation model and the burn-and-mint flow, so teams know exactly how dollars move between chains.

For institutions, treasuries, and payment companies, USDCx links Cardano to Circle's wider dollar network. That network includes the Cross-Chain Transfer Protocol (CCTP), Circle's system for sending USDC between chains using burn-and-mint instead of wrapped tokens, and Gateway, Circle's service for routing USDC liquidity across chains on demand. The result: dollar liquidity can flow between Cardano and other networks without negotiating with a separate bridge provider. The trade-off is that the underlying reserves depend on Circle's continued operation and transparency reporting, the same risk model that applies to all USDC-backed assets.