Miden Launches USDCx With Circle xReserve for Privacy

The stablecoin runs on Circle’s xReserve and is meant to make selective disclosure possible for auditors and regulators. That lets Miden connect privacy to payments, payroll, and corporate treasury.

Key Takeaways

• Miden is launching USDCx at the end of this month, a privacy-focused stablecoin that is backed 1:1 by USDC through Circle’s xReserve infrastructure.
• USDCx is meant to make payments and transfers possible without public visibility into balances, counterparties, or transaction history, while selective disclosure supports compliance.
• The launch lines up with the Miden mainnet and is aimed at payments, trading, payroll, and corporate treasury management.

Miden wants to launch USDCx at the end of this month, a privacy-focused stablecoin backed 1:1 by USDC through Circle’s xReserve infrastructure. The coin is meant to let users pay and move funds without balances, counterparties, or transaction history being publicly visible, while compliance remains possible through selective disclosure.

Privacy as the Default

USDCx will be issued natively on Miden and runs on an xReserve smart contract where Circle’s stablecoin is held. That fits Miden’s setup as a zero-knowledge blockchain, where transactions are executed on users’ devices and proven instead of being exposed directly on-chain.

That approach is meant to tackle a familiar problem with public blockchains: full transparency is useful for verification, but it is tough for parties that do not want financial data made public. Miden is therefore positioning USDCx as part of a broader PriFi strategy, aimed at private institutional trading, B2B payments, payroll, cross-border payments, and corporate treasury.

Compliance Remains Built In

According to Miden, users can selectively prove balances, provenance, and other information to auditors, regulators, and counterparties when needed. In doing so, the project is trying to put privacy and verifiability side by side instead of treating them as opposites.

That combination could matter for European crypto readers, because stablecoins are increasingly seen as infrastructure for payments and settlement, not just as a trading tool. For institutional players, the big question remains how far privacy can go without putting pressure on compliance and reporting. That debate is also playing out more broadly across the sector, where companies are looking for ways to combine private transactions with verifiability, such as in institutional stablecoin transactions.

Mainnet and Use Cases

The launch of USDCx is scheduled to roll out alongside the Miden mainnet at the end of this month. Miden says the stablecoin is meant to fit use cases like payments, trading, payroll, and corporate treasury management.

The project was spun out of Polygon in April 2025 and is backed by a16z crypto, 1kx, and Hack VC, among others. That gives the USDCx launch extra weight, especially since privacy infrastructure and stablecoin rails are increasingly being built together instead of separately.