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…

At Arc Studio, @MerlinEgalite of @Morpho put it simply: “Stablecoins are one of the greatest improvements blockchain has brought to the public.” Stablecoins gave people portable checking accounts. Arc + Morpho points to the next step: onchain savings with just a wallet and an internet connection.

Have you ever been frustrated using a Web3 wallet having to figure out your USDC across 5-6 different chains, needing to bridge and swap and re-balance constantly, with slippage and fees, and confusing UX? Have you ever thought "how will the normies every figure this out?" We've thought about this too, A LOT. And today we're launching the new Unified Balance Kit, and simple developer tool that allows wallet builders to offer their users a single unified USDC balance with the ability to perform nearly instant (<500ms) crosschain sends to the most popular chains. Users get a simple UX that makes sense --- a single USDC balance, and no need to think about, understand or deal with the complexity of crosschain interactions. These small steps are what will bring USDC into mass adoption within mainstream app and wallet experiences. Available to start building with today.

Today, we are introducing the Unified Balance Kit! It is a TypeScript SDK within App Kits that is built on top of Circle Gateway, a protocol that enables a unified USDC balance across supported blockchains and handles the underlying crosschain movement of funds when spending. Instead of stitching together different routing logics, developers can use this SDK to deposit, view, estimate, and spend from a unified USDC balance. Try it out yourself!

Supporting USDC flows across chains just got a lot simpler. Unified Balance Kit gives developers one integration surface for chain-abstracted USDC balances, with: → Instant crosschain USDC access in under 500 ms → Simpler treasury operations with less reconciliation overhead → Smart defaults that select cost-effective source chains automatically Unified Balance Kit is powered by Circle Gateway, inheriting its core capabilities while remaining extensible to third-party services. Learn more: arc.network/blog/unified-b…

Been watching what builders are doing at the agentic economy hackathon and honestly some of these use cases weren't on our radar at all Nanopayment insurance? Pay-per-query AI? This is what happens when you ship infra and get out of the way

Agentic Economy on @arc Hackathon: Day 1. Watch @GoogleDeepMind dropping extra $5K into the Prize Pool. Power up apps built with @BuildOnCircle Nanopayments with @GeminiApp & GoogleAIStudio. Settle value on Arc in USDC. Let’s turn up the heat.

Most cross-border payments still move through a long chain of institutions before they reach their destination. Each intermediary helps the system function. But each intermediary also adds delay. Stablecoin settlement gives institutions a more direct way to coordinate. Shared infrastructure reduces complexity in how value moves across borders and improves the speed of settlement. The architecture becomes simpler, more connected, and easier to scale.

Did you attend today's Office Hours on the @arc Discord? You might spot yourself in the image below. Office Hours, hosted every Tuesday by @silencexlm and @0xmikef, is steadily growing. It is a dedicated event where only genuine community developers can share demos of their meaningful, long-term projects. If you are a committed developer, please join the next Office Hours on Tuesday. Next Office Hours - community.arc.network/home/events/ar…

maybe a good @arc house night

App Kit: From 200 Lines to 6 on @Arc I published a deep dive on Arc House breaking down what App Kit actually does under the hood, and how it compresses a full CCTP integration into a single function call. Even if you're new to cross-chain, you’ll understand how the whole flow works after this. I built a bridge from scratch first. Raw CCTP. 200+ lines - contract interactions, attestation polling, retry logic, gas estimation across chains. Then I rebuilt it with App Kit. 6 lines. So I went deeper - into how kit.bridge() abstracts the full burn → attest → mint flow, how the adapter system works across EVM and Solana, FAST vs SLOW transfer modes, the Forwarding Service, and how we integrated it across 17 testnet chains in XyloNet. Most people use SDKs without knowing what’s happening underneath. I wanted to break that down properly. If you're building on Arc or evaluating App Kit for cross-chain USDC movement, this one's for you. Read the full post here 👇 community.arc.network/home/forum/boa…

Post-quantum readiness is becoming part of the baseline for financial infrastructure built to last. Long-term cryptographic security requires infrastructure that institutions, developers, and operators can adopt without waiting for a forced transition. Arc is designed to build for that from the start.

Day 2 of Agentic Economy on @arc. If you're hacking and need data — Twitter, financial, search, scholar, YouTube — AIsa has 100+ production endpoints accessible via @circle nanopayments. If you wish to get a first-hand feel for how lightning-fast nanopayments work on @arc, give it a spin. Here's how to get started in under 5 minutes. Watch the demo 👇 @BuildOnCircle @lablabai

ICYMI Our very own @TxnSheng, our DevRel APAC Lead, sat down for an in-depth office hrs and walkthrough of our App Kits. Make sure to save, share, and watch it over...and over...until memorized. Good stuff!!! community.arc.network/home/events/ap…

Cross-border payments look different when money moves instantly. Consumer remittances, tokenized invoices, and programmatic payout systems all become more usable.

@ETHGlobal Builders build

gm 💚 remember: you can just build things

more @arc-tists on the rise

Agentic Economy on Arc Hackathon starts today 🔥 Good luck to the teams participating and say hi to the Alsa team in SF if you are going!

congratulations to me, i’ve just surpassed over 4k points in arc and currently a tier 2 arc ambassador great milestone achieved ❤️

What is it actually like to build on Arc? At Arc Studio, early builders from @BuFi_Global, @dynamic_xyz, and @0xsequence shared how they’re using Arc to power wallets, interoperability, and better UX for real applications. From embedded wallets to crosschain coordination, this is what’s being built on Arc today.

See you in SF next week! @BuildOnCircle @arc @lablabai