Circle

Arc Public Testnet is live. @Arc is an open Layer-1 blockchain designed to serve as the Economic OS for the internet, uniting programmable money and onchain innovation with real-world economic activity. Arc is uniquely suited to be a new trusted foundation for: → Lending and financial services → Capital markets → Tokenized asset issuance → Stablecoin settlement worldwide With deterministic sub-second finality, stablecoins as native gas, and opt-in configurable privacy, Arc is purpose-built to meet the needs of the global financial system. It’s built for a world where: → Financial apps are as accessible as email → Dollars, euros, pesos, and other fiat currencies move instantly → Private transactions that support compliance happen at scale → AI agents transact and coordinate commercial activity autonomously Arc testnet is already seeing participation from leading companies across capital markets, global payments and technology platforms, and full-stack developer infrastructure providers. Guided by Circle’s vision of making money truly open and programmable, Arc is public internet infrastructure that invites everyone to build, coordinate, and transact onchain. Start building: docs.arc.network Read the release: circle.com/pressroom/circ…

EURC wallet share grew more than 6x from January 2025 to March 2026. As adoption expands, euro-denominated stablecoin usage is reaching a broader set of users and applications onchain.

Jeremy Allaire (@jerallaire) is the Chairman, CEO, and co-founder of @circle, the issuer of USDC — a stablecoin with nearly $80 billion in circulation and a core piece of the broader stablecoin market, which has grown from zero to more than $300 billion over the past decade. In this fireside, YC Visiting Partner @nemild sat down with Jeremy to talk about Circle's founding vision of building an internet protocol for dollars, the wave of institutional and regulatory adoption now reshaping the financial system, and why agentic economic activity, not just consumer payments, might represent the most transformative frontier for stablecoin builders in the years ahead. 00:00 - Why Stablecoins Matter 01:45 - Circle's Origin 07:10 - Top Use Cases for Builders Today 11:22 - Consumer vs. Business Adoption 13:20 - Banks & Institutions Enter the Space 17:54 - Global Regulation Landscape 22:40 - AI Agents & the Agentic Economy 26:15 - Missing Infrastructure for Builders 27:38 - Three Big Predictions for Stablecoins

Proud to share that Circle won the World Trademark Review Industry Award 2026 for Financial & Professional Services Team of the Year! Congratulations to the team helping protect and build our trusted global brand!

Circle Current Session Recap: Always-On Settlement Rewrites the Bank Operating Model Circle Current is a series from Circle that brings together industry leaders to explore what’s next in the internet financial system. Always-on settlement is moving from pilot to production, with stablecoin rails giving banks a practical path to move funds 24/7. What’s changing: → Settlement is moving beyond banking hours → Liquidity can move with less delay → Prefunding requirements can start to shrink → Treasury and operations teams need to adapt to continuous money movement Visa’s rollout shows this is no longer an edge case. For banks, the shift is bigger than faster payments. It is an operating model change. Read the blog for more details: circle.com/current/always…

The future is now! What a room full of Bermuda @USDC holders look like @circle

An agent with funds still needs trusted services it can pay for to complete its tasks. Agent Marketplace gives users and agents a structured place to discover, evaluate, and integrate agentic services. That moves service access closer to usage-based, programmable economic activity. Part of Circle Agent Stack: agents.circle.com

.@circle Agent Stack (CAS) meets a browser-based OS 200k+ decentralized agents for hire in the third space for AI

USYC’s growth reflects the expanding role of tokenized real-world assets in capital markets. Circle’s tokenized money market fund is becoming a key building block for onchain collateral.

HIP-4 introduces outcome-based markets to @HyperliquidX — new primitives for onchain trading. Circle is becoming the technical deployer of USDC as an Aligned Quote Asset (AQA). What matters is how liquidity, capital, and settlement coordinate across these systems — with native crosschain infrastructure enabling how capital moves. From trading to nanopayments, this is programmable money moving into more complex market structures.

New market structures are going onchain.  USDC is a foundational layer for liquidity, collateral, and quoting on @HyperliquidX. Open, interoperable and programmable digital dollars will power the future of all of finance. Hyperliquid.

USDC is becoming a core part of @HyperliquidX’s evolving market structure. USDC will become an Aligned Quote Asset on Hyperliquid and continue as the primary collateral asset across HIP-1, HIP-2, HIP-3, and now HIP-4 markets. As Hyperliquid expands into new onchain markets, USDC enables: → Deep liquidity across trading pairs → Greater capital efficiency ecosystem-wide → Seamless crosschain access to digital dollars Circle is also making a significant financial investment in the ecosystem through HYPE staking. Hyperliquid. circle.com/blog/circle-ex…

@jerallaire @HyperliquidX Hyperliquid.

As AI agents take on more work across information, data, and coordination, financial infrastructure has to evolve with them. @jerallaire speaks on why AI operating systems and economic operating systems will need to work together at @Abundance360.

@alpendhq Congrats and welcome to CAP!

Excited to share that we have joined the @Circle Alliance Program, a global network of like-minded companies and teams focused on the future of finance. As members, we are looking forward to building new connections and continuing to learn and innovate with #USDC and web3 technology.

Agents need access to funds. Users need control. Agent Wallets give agents a way to hold and move USDC under human-defined policies, including: → Time-bound spending limits → Transfer and x402 service controls → Allowlists and blocklists → Wallet-layer policy enforcement Built for agentic payments with guardrails.

Circle Gateway now supports webhooks. Developers can receive real-time notifications for key lifecycle events like deposits, forwarded messages, and mints directly in their backend, instead of relying on polling. → React to deposit finalized events without constant polling → Trigger backend workflows when state changes happen → Build cleaner event-driven crosschain flows Start building: developers.circle.com/gateway/webhoo…