Circle Developer

Bridge Kit now supports @Arc Testnet! Bridge Kit makes it easy to build crosschain experiences with @USDC and CCTP V2 in under ten lines of code: → Intuitive SDK methods → Built-in monetization support → Flexible setup → Step-by-step tutorials Get started with Bridge Kit: developers.circle.com/bridge-kit Learn more about Arc Testnet: docs.arc.network

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!

Great presentation by @USC student demonstrating how @arc unlocks programmable money flows for cross-border tuition payments. @jpyc_official -> @USDC via StableFX is a powerful combination for developers.

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…

Building for the agentic age? Vyper has you covered. Three open-source repos for agentic payments in Python: a Gateway/x402 SDK, scaffolds for onchain payment primitives, and an ERC-8004 implementation for agent identity. Use them on Arc Testnet, Base, Ethereum, Arbitrum, Optimism, and more...

OSL Group is expanding USDC across global trading and payments, making it more accessible and practical across the OSL ecosystem. With OSL StableHub, users can convert USD and USDC on a true 1:1 basis with zero fees and zero slippage — making it easier to move between fiat and digital dollars for trading, settlement, and broader payment use cases. Access matters. Usability matters more.

The internet is shifting from human clicks to autonomous agents, and eventually to billions of agents coordinating and exchanging value. Our Chief Product & Technology Officer @chandhok joined @cuysheffield and @bamazizimesh on @TokenizedPod to unpack Circle’s strategy for the agentic economy. From @USDC nanopayments to the upcoming @Arc mainnet launch, we are taking a multi-protocol approach across x402, MPP, AP2, and more to build the Economic OS for the internet. Read the recap: circle.com/blog/building-…

This is one of the coolest examples of @circle's Nanopayment in real-world use!! I'm excited to see what's coming to @arc

The onchain economy is coming. A first look at The Culture of Currency with @wyclef. Around the world, a new movement of money is taking shape.

.@Circle has been working with us since Day 1 as both a infrastructure provider and an early backer. USDC has been at the core of Zebec’s ecosystem from the beginning, powering real-world payments across payroll, card spending, and cross-border transfers.

USDCx now supported on Allbridge Core. @USDC across @Allbridge_io's 24 supported chains now has a direct path to Bitcoin DeFi on Stacks. Lower fees, deeper liquidity and better UX, what are you waiting for?

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

A new model of aid is being piloted in Colombia. In partnership with @mercycorps / @MCSocialVenture & @GSR_io / @foundation_gsr, @HumLinked have built a solution that leverages Aleo’s privacy technology to deliver private stablecoin donations to displaced communities, protecting personal data and preserving dignity throughout the process. Unlike other crypto donation platforms that broadcast transactions on public ledgers, this solution enables organizations to verify eligibility and distribute aid without exposing sensitive information about recipients. Two pilots are underway, first with the dedicated team at @DRC_ngo, and soon with @GOAL_Global, to send private donations to people in need. With USDCx on Aleo, a stablecoin backed by @USDC in @Circle xReserve, the team can securely validate eligibility while protecting the identity and safety of those receiving aid. To ensure the program is as inclusive as possible, recipients can register for donations via WhatsApp and redeem their funds simply by using QR codes. We are deeply grateful for the opportunity to support this important work. You can learn more about this initiative below. Read More 👇 mercycorpsventures.com/blog/pilot-lau…

If you used Nanopayments, you’ve used Gateway 👀

Arc and Circle are organising a hybrid hackathon on the hot topic of Agentic Economy, that is coming online in a couple of days and we are so excited to see what you all are going to build. Your mission, if you choose to accept, is to design and ship an application or an agent or developer tooling that leverages USDC and Gateway for the agentic economy. Check out the link below for more information 👇

What I love about forwarding service is the ability to move USDC from any supported chains to now Solana without requiring native tokens to mint USDC on the destination chain. This is powerful especially if you are looking to abstract away different token complexities across various networks and just focus on USDC

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.

Excited to share that we have joined the @Circle Alliance Program, a global community of teams focused on bringing the world on-chain, powered by USDC! To learn more about this program: circle.com/en/alliance-pr…

If you are using @circle Gateway you can now use the Get a Transfer by ID endpoint (link below) to get detailed information about a transfer which you can poll to know when a Transfer has been confirmed on the destination chain.

Note: Deposits are routed via edgeX-controlled smart contracts. Circle does not control these contracts and is not responsible for user errors or third-party contract issues. Access may be limited in certain jurisdictions.

edgeX is the first partner to integrate Deposit Kit. Deposit Kit enables developers to offer seamless USDC deposit flows from supported chains directly into any app, without needing to manage custom bridge infrastructure or transaction broadcasting. If you’re building an exchange, trading platform, or onchain app and want the same experience for your users, join the waitlist: circle.com/deposit-kit-wa…