Pay On Arc a Simple Way To Accept USDC Payments, Is Now Live On The @arc Testnet. PayOnArc is a simple payment infrastructure built on Arc testnet for anyone who wants to accept USDC payments. It allows merchants to create payment links, track transactions, and manage everything from a single dashboard. Payonarc platform also includes API keys and webhook support, making it easier for developers to integrate payments into their applications. With wallet-based authentication and a clean setup process, Pay On Arc provides a practical way to handle USDC payments on Arc testnet. Built by @0xbardia 🔗 payonarc.xyz

Finally…someone on this app that understands basketball. As a travel dad you see games lost like this every weekend

Blockchains are operating systems with a key difference: tamper resistant code, perfectly auditable inputs and outputs, and provable machine state. @jerallaire explains that as AI drives more economic activity, those assurances become even more critical.

We’re in New York for ETHGlobal New York from June 12–14, 2026 with $15,000 in prizes for best submissions. Building on Arc in NYC? We’re looking for stablecoin-native applications built on Arc and with Circle tooling across wallets, interops, App Kit, and the new Agent Stack. Come ship with the team, get hands-on support, share product feedback, and compete for prizes. See you here! ethglobal.com/events/newyork…

Liquidity infrastructure for stablecoin FX is building on Arc. @AerodromeFi is coming to Arc, deploying its exchange infrastructure to help power Arc’s stablecoin-native ecosystem. This launch unlocks: → Deeper markets for FX swaps and liquidity provision → A proven way to bootstrap stablecoin liquidity on Arc → Capital-efficient infrastructure to help grow onchain economies More to come.

New in the Unified Balance Kit technical series: Designing for Pending and Funds-in-Motion States Available USDC is not always the same as confirmed balance. Model spend readiness across confirmed balances, pending inbound funds, and committed execution flows. arc.io/blog/unified-balance-…

The Bored Room was an eight-hour waiting game about legacy financial rails. Approvals stalled. FX leaked value. Banking hours got in the way. The payment never arrived. Funny because it was fictional. Painful because it was familiar. Arc is designed to fix this. An open internet platform built for: → 24/7 settlement → Sub-second finality → Stablecoin-native payments → Programmable FX → Agentic economic activity Read the recap: arc.io/blog/eight-hours-in-t…

In this Release Notes episode, we cover Circle Forwarding Service for Gateway and how it simplifies crosschain USDC transfers. Developers can use it to: → Move USDC crosschain without managing destination chain gas fees → Reduce multichain infrastructure overhead → Automate destination-chain minting

Value to app developers and probably fair markets - @arc’s proposed multi-proposer architecture unveiled.

Hosting a meetup to talk about Circle Agent Stack this Thursday, in person, in Singapore. If you are around and are interested to attend, do apply and let me know in the thread or DMs. 👀 bring your laptop for special surprise

The debate about whether open payments infrastructure could compete with closed networks is over. @ddisparte on what settled it, and what comes next for stablecoins.

Arc Testnet is upgrading to v0.7.2. This release activates on Testnet on June 18, 2026 at 5:00 AM PT, bringing new features to the network. Please upgrade your testnet nodes before activation to avoid desyncing. Release notes: github.com/circlefin/arc-nod…

Do you have an idea that feels worthy? Come join the fun community.arc.io/home/clubs/… Good luck!

XyloNet is building stablecoin DeFi and social tipping on Arc Testnet. Built by ForgeLabs, @Xylonet_ brings together: → Stablecoin swaps for USDC and EURC → Liquidity pools → CCTP V2 bridging → ERC-4626 vaults Alongside XyloNet, PayX adds a consumer payment flow that lets users send USDC tips (which are held in smart-contract escrow) to an X handle before the recipient has connected a wallet. Together, they show how Arc can support both DeFi infrastructure and payment UX on the same stablecoin-native settlement layer. arc.io/blog/how-xylonet-is-b…

Pay On Arc a Simple Way To Accept USDC Payments, Is Now Live On The @arc Testnet. PayOnArc is a simple payment infrastructure built on Arc testnet for anyone who wants to accept USDC payments. It allows merchants to create payment links, track transactions, and manage everything from a single dashboard. Payonarc platform also includes API keys and webhook support, making it easier for developers to integrate payments into their applications. With wallet-based authentication and a clean setup process, Pay On Arc provides a practical way to handle USDC payments on Arc testnet. Built by @0xbardia 🔗 payonarc.xyz

The reality is, many of the activities businesses rely on every day such as payroll, treasury operations, trading strategies, asset issuance, B2B payments, and FX, require privacy while still maintaining accountability. Arc's privacy whitepaper outlines a future approach to opt-in confidentiality with governed visibility for authorized parties. The goal isn't anonymity. It's giving organizations the ability to protect sensitive financial activity while preserving trust, compliance, and transparency where it matters. That's a critical building block for bringing more real-world financial activity onchain. @silencexlm provides an honest look at the white paper. Read more in Arc House community.arc.io/home/blogs/…

sample apps! sample apps! sample apps! @arc @buildoncircle looking for a head start? we've been publishing a growing collection of sample apps that demonstrate real-world use cases powered by USDC, Arc, Circle Wallets, Gateway, and related developer tools. have you forked a sample app yet? 👀 i just posted our directory of current sample apps: community.arc.io/home/forum/…

Today we published the detailed design for Arc’s upcoming privacy infrastructure. It is a major step forward in building the Internet financial system in a way that works for people, households, major, corporations, and financial institutions. We’re excited to share this with the world and ultimately bring this onchain on @arc

Circle Research introduces Arc Multi-Proposer Protocol (AMP), a new approach to block building. AMP introduces proposers that bundle user transactions into payloads and broadcast them directly to validators. The result: → Bounded inclusion → Fixed ordering → Application-aligned order flow For financial applications, block construction matters. Predictable settlement needs predictable transaction handling. circle.com/blog/amp-rethinki…