Polygon Labs, Union Build, and Celestia Org Announce AMA on Blockchain Interoperability

The U.S. has officially stopped producing pennies, marking the end of an era for physical currency. **Perfect timing** for blockchain adoption - microtransactions now cost fractions of a cent on networks like Polygon, making digital payments more practical than ever. - Physical penny production has ceased - Blockchain transaction costs now lower than traditional currency denominations - Polygon enables sub-cent transaction fees Sandeep Nailwal discusses the implications in a detailed conversation about how this shift could accelerate onchain microtransactions. [Watch the full discussion](https://www.youtube.com/watch?v=z5HKt45NILI)

**Polygon is bringing Devcon 8 to Mumbai, India** - marking a significant homecoming for the Ethereum scaling platform. The announcement comes as part of Polygon's expanded presence in India, following: - 8 successful Polygon Guild meetups - A month-long hackathon - The flagship #PolygonConnect event **Mumbai will host the major blockchain conference**, continuing Devcon's tradition of rotating global locations. This represents a major milestone for India's growing Web3 ecosystem. The move signals **strong momentum for blockchain adoption** in one of the world's largest tech markets.

**Polygon Labs hosted Money Rails** at Devconnect Buenos Aires, drawing over 1,000 attendees to discuss payments infrastructure and institutional adoption. **Major announcements included:** - New **Revolut integration** enabling 14M+ users across 38 countries to send/receive USDC, USDT, and POL with zero fees - **Mastercard partnership** on Polygon rails - Real-time, borderless money movement capabilities The event featured discussions on: - Institutional adoption trends - Privacy in payments - Emerging market opportunities - New integration alpha **Event highlights:** - Live commentary by Boys Club World - Networking with ecosystem builders - Tokenized Messi football giveaway via FSL Web3 - POAP collection activities The Revolut integration represents the first phase of a larger collaboration, positioning Polygon as infrastructure for mainstream finance adoption.

**Polygon is sponsoring ETHGlobal Buenos Aires** with $10,000 in prizes for developers building with x402 and agentic payments. **Event Details:** - **Dates:** November 21-23 - **Location:** Buenos Aires, Workshop Room 2 - **Focus:** Best use of x402 and agentic payments on Polygon Developers can access comprehensive documentation and resources for agentic payments on Polygon through their dedicated docs portal. [Register for ETHGlobal Buenos Aires](https://ethglobal.com/events/buenosaires/prizes/polygon) [Learn about agentic payments](https://agentic-docs.polygon.technology/general/)

**Mastercard has selected Polygon** to power its new Crypto Credential system, enabling username-based transfers for self-custody wallets in partnership with Mercuryo. **Key features include:** - One-time user onboarding with verified username creation - Direct wallet linking for instant asset transfers - **No more copying complex hex addresses** Mercuryo handles user verification and credential issuance, while **Polygon provides the blockchain infrastructure**. The partnership leverages Polygon's low-cost, high-speed payment rails designed for scalability and reliability. This development represents a significant step toward **mainstream crypto adoption** by simplifying the user experience for digital asset transfers.