Mastercard Selects Polygon to Power Verified Username Transfers for Self-Custody Wallets

Global payment leader Mastercard, Polygon Labs and Mercuryo have announced Tuesday they are extending Mastercard Crypto Credential to self-custody wallets, adding username-style aliases intended to eliminate the need for long alphanumeric wallet addresses.

Mastercard said it chose Polygon as the first blockchain to support the initiative, pointing to the network’s speed, reliability and suitability for payments infrastructure. Mercuryo will serve as the initial issuer responsible for verifying users and enabling the creation of new Crypto Credential aliases.

Identity Verification Meets Human-Readable Wallets

Mercuryo sait it will conduct identity checks and issue the aliases, which users may bind to their wallets across the network. Users can also request a Crypto Credential soulbound token on Polygon, showing onchain that the associated wallet belongs to a verified user.

The shift away from lengthy hexadecimal wallet strings aims to reduce errors and increase confidence in digital transactions. A single verified alias recognized across the Crypto Credential network brings blockchain usage closer to familiar payment flows, said the firm.

Polygon Positioned as Payments-Grade Infrastructure

Mastercard’s decision to use Polygon reflects the network’s emphasis on scalability and predictable settlement. The Polygon Proof-of-Stake chain offers low transaction costs, high throughput and rapid confirmation times suitable for real-world payment activity.

Recent upgrades—including the Rio and Heimdall v2 releases—have strengthened finality guarantees, mitigated reorganization risk and paved the way for higher throughput. Polygon already handles a meaningful share of U.S. stablecoin transfers and supports a broad segment of neobanks and fintechs integrating digital asset rails.

Polygon Labs CEO Marc Boiron said the partnership shows how blockchain networks can meet the demands of mainstream financial services, adding that success will come as blockchain becomes “invisible” to end users.

Toward Mainstream Self-Custody and Onchain Payments

Mercuryo’s role in verifying users and issuing credentials is intended to make self-custody wallets more approachable, offering a clearer, user-friendly workflow for managing digital assets.

The companies say improvements in verification and user experience are pushing self-custody beyond niche use cases toward broader consumer adoption.

Mastercard executives framed the initiative as part of the firm’s ongoing effort to build trust in blockchain-based transactions and deliver intuitive digital asset experiences at scale.

The expansion of Crypto Credential illustrates a broader industry trend in which payments, identity and blockchain infrastructure increasingly overlap. As financial institutions expand onchain capabilities, frameworks like Crypto Credential—and networks like Polygon—are helping to define the next generation of global payments.

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