Arc

Arc Public Testnet is now live. Open to developers and enterprises globally, Arc is the Economic OS for the internet that unites programmable money and onchain innovation with real-world economic activity. Start building: docs.arc.network Learn more: arc.network/blog/circle-la…

Crosschain payments shouldn’t be slowed down by settlement. With Circle Gateway, builders can unify USDC liquidity across networks. On Arc, they can establish that balance with sub-second finality. → Faster settlement → Cleaner crosschain UX → Built on Arc

We returned to London for our second @encodeclub hackathon bringing together 150+ builders shipping on Arc. For the first time, teams experimented with nanopayments, unlocking new models for microtransactions, agentic commerce, and programmable stablecoin apps. Across six tracks, developers integrated Arc Testnet with Circle’s developer platform using USDC, USYC, StableFX, CCTP, Nanopayments, and Circle Wallets. → 80+ submissions → 8 winning teams The Arc team spent the weekend mentoring builders while @bleso_a walked through the new multichain Arc sample app to help teams get shipping faster. The Arc builder ecosystem keeps growing. Here’s what the winning teams built: 🏆 Nanopayments USDC-ME (1st): A gasless “Venmo for USDC” using Nanopayments where signed spend intents batch settle with near-zero fees. Blink (2nd): Streaming laptop insurance priced per-second using nanopayments. 🏆 Best Smart Contracts Chariot: A cross-chain lending protocol combining borrower interest with USYC T-bill returns. 🏆 Chain-Abstracted USDC Apps MeanTime: Turns CCTP transfer delays into tradable liquidity using Transfer-NFTs. 🏆 Global Payouts & Treasury Settl: A multi-chain payroll and treasury system that automates fund management, executes global USDC payouts, and includes built-in fraud detection and real-time treasury visibility. Zerra: A chain-abstracted storefront where merchants always receive USDC on Arc regardless of user assets. 🏆 Agentic Commerce OTTO: An AI treasury agent that manages USDC across chains, pays services with nanopayments, and allocates funds into USYC. 🏆 USYC / StableFX Integration Sphere: A visual treasury dashboard for managing wallets, swaps, USYC or DeFi routing, and automated financial workflows.

Join us in about 1 hour to learn about ClawRouter by BlockRunAI from @bc1beat , the human behind the agent who won the USDC OpenClaw hackathon! Should be great fun and very interesting. Get notified at community.arc.network/home/events/us…

AI agents that can spend USDC. Autonomously. ClawRouter from BlockRunAI was a standout winner in the USDC OpenClaw Hackathon, pushing the boundaries of agentic commerce onchain. Join @samconnerone and Vicky Fu live on Mar 19 at 2PM ET for a deep dive into the winning build: → Per-agent USDC wallets → Autonomous model selection via local scoring → Pay-per-inference with signed USDC authorizations → How to run and extend it locally See how hackathon ideas turn into real, composable infrastructure for the agent economy. RSVP: community.arc.network/home/events/us… Repo: github.com/BlockRunAI/Cla…

We're building the rails for true agent-scale value exchange with @arc, @circle Nanopayments, and @GoogleDeepMind. The Agentic Economy on Arc Hackathon is live. April 20–26. Mark your calendars. A new economic primitive for the internet starts here - powered by Circle’s Nanopayments.

Tokenizing assets shouldn’t mean rebuilding compliance and settlement from scratch. On Arc, builders can: → Issue programmable real-world assets → Embed transfer restrictions and investor controls onchain → Settle with deterministic finality → Automate redemptions, distributions, and corporate actions → Pay predictable, fiat-denominated fees in stablecoins Asset lifecycle management, as code.

Deploy your first smart contract on @arc No I’m serious…literally stop what you’re doing and follow these steps. Go

The agentic equivalent of trust but verify now live on @arc testnet.

Arc 🤝 @trmlabs TRM Labs is bringing blockchain intelligence and risk monitoring infrastructure to teams building on Arc Testnet. This gives developers and enterprises the visibility and compliance tooling needed to deploy production-ready applications from day one. → Transaction monitoring and risk detection → Enterprise-grade blockchain intelligence → Infrastructure designed for trust and scale Arc is built for real economic activity. Builders can now ship with confidence.

AI agents can now build financial reputation on Arc. ERC-8004 is now live on Arc Testnet, enabling verifiable onchain identity, discoverability, and portable reputation for autonomous agents. What this unlocks: → Persistent agent identities → Onchain reputation tied to economic behavior → Discoverable agents you can trust across DeFi and commerce As agents execute trades, manage capital, and provide services, trust shouldn’t reset between applications. With ERC-8004 on Arc, agents build reputation once and carry it everywhere, transforming on-chain history into usable financial trust. Start building: docs.arc.network/arc/tutorials/…

Hinkal Pay is live on @arc testnet. Confidential settlement is now end-to-end. Institutions running stablecoin operations on Arc can now settle confidentially. Sender, recipient, amounts - all private, without changing wallets, assets, or chain. With Hinkal Pay, institutions can: - Send confidentially - Receive confidentially - Execute private & public payouts - Maintain compliance controls How it works When funds settle through Hinkal Pay, they move to a confidential balance inside Hinkal’s smart contract, controlled by the recipient’s existing wallet. From there, recipients can access funds with the wallet the sender entered as the recipient and: - Pay privately Execute confidential payouts to vendors, affiliates, employees, partners, or treasury accounts. Sender, recipient, and amounts remain confidential on-chain. - Send to public wallets Send funds as a standard on-chain transfer to any public wallet address. The sender remains private. All transactions are screened via @chainalysis before execution, and high-risk or flagged addresses are prevented from accessing the smart contract. Viewing keys enable proactive sharing of all transactions with any regulators/chain analytics platform when required, without exposing balances, treasury structures, and payment patterns to counterparties or competitors. ZK-based. Compliant. End-to-end. Inside the Arc stablecoin infrastructure. Try it at pay.hinkal.io

AI and blockchain networks are redefining money movement. Programmable intelligence meets programmable money.

Who's exploring prediction markets on @arc ? Share your project below

Building credit markets today means stitching together identity, underwriting logic, compliance workflows, and settlement rails. On Arc, developers can: → Denominate loans in stablecoins → Settle disbursements and repayments with deterministic finality → Embed compliance and privacy controls at the asset level Programmable credit starts with stablecoin-native infrastructure. Build on Arc.

@jerallaire 👋

Get ready for StableFX, only on @Arc

@AdiSeredinschi /use-arc

/use-arc, what else? note that this uses the Public Testnet

AI agents are becoming builders. Circle Skills now support building with Arc and Circle’s full-stack platform, giving AI coding tools best-practice guidance for stablecoin-native applications. Use them with Cursor, Claude Code, Codex, or any agent to generate Arc integrations for: → @USDC payments → Crosschain flows → Wallet infrastructure → Smart contract logic github.com/circlefin/skil…

We brought 100+ developers together in Buenos Aires for our first Arc Studio. An afternoon of deep technical sessions, candid ecosystem conversations, and real builder momentum. From protocol design to funding pathways, the focus was simple: What can be shipped on Arc? The energy in the room made one thing clear. Builders are ready. Huge thank you to our panelists: @BuFi_Global @dynamic_xyz @Morpho @0xsequence This is how ecosystems compound. More to come.