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

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

Higher limits. Lower latency. Greater reliability. @BuildOnCircle breaks down how Gateway powers Eco to fill $1M+ crosschain @USDC orders, at 10x the previous limits, without sacrificing protocol reliability. Read the full case study: circle.com/blog/eco-build…

Eco is using Circle Gateway to scale multichain execution. With a unified USDC balance across supported chains, @eco says Gateway helped: → Enable faster access to liquidity through improved deposit flows → Increase Routes API order size limits by 10x → Support 7-figure crosschain USDC orders with less operational drag circle.com/blog/eco-build…

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…

Using Circle Agent Stack, you can fund agents with USDC to analyze and optimize your posts on X. Watch @bleso_a’s walkthrough and see what your agent can do.

Circle Agent Stack is infrastructure for the agentic economy. In this demo, watch an agent: → Create a wallet funded with USDC → Discover services in Agent Marketplace → Pay for API access through Circle Gateway → Execute financial actions with Circle CLI Built for developers creating agent systems with defined permissions and guardrails. agents.circle.com

The Circle Agent Stack is live and builders are already exploring what’s possible with agentic experiences. Now we want to hear from you. What’s working? What’s missing? What would help you build faster? Drop your feedback here 👇 community.arc.network/home/clubs/age…

I gave an AI agent USDC to analyze my tweets and audit my X profile. Here’s how you can do the same.

Agents are evolving beyond just answering questions, they are becoming economic actors. They > execute transactions > coordinate multi-step workflows > interact with services all without human intervention. But the infrastructure for agent driven activity does not exist for scale. Until today. Today, Circle introduces the Circle Agent Stack, a chain and protocol agnostic infrastructure that is purpose built for agent economic activity. Agent Stack brings together > Agent Wallets - for agents to hold and move funds autonomously > Agent Marketplace - for agents to discover, evaluate, and pay for services > Nanopayments powered by Circle Gateway - for agents to make gasless USDC transactions down to $0.000001 > Circle CLI - to provide deterministic agent native orchestration I've recorded a demo on how you could enable your agent to participate in this agentic economy. Check it out below! community.arc.network/home/clubs/age…

At the core Agent Stack is about Nanopayments powered by @circle. Available on Meridian.

Fired up to support Circle Agent Stack as a Nanopayments launch partner! Agents need infra that just works: wallets, a marketplace, CLI, and USDC settlement.

Thrilled to support @circle on their Agent Stack launch! Agent Stack uses Eco for fast deposits into Gateway and Nanopayments. Faster, smarter money.

Give your agents money. Set their guardrails. Let them ship. circle init agent → Circle Agent Stack Open, composable, USDC-native. Built for the agentic economy. agents.circle.com

To transact, agents need wallets, permissions, discovery, and settlement built to match the ambitions of AI. Circle Agent Stack brings a comprehensive financial layer for agents together with @USDC at the core.

Circle Agent Stack is 🔥🔥🔥 Take it for a spin in Claude, Codex, Cursor Claw or more. Permissionless Agent Wallets. Build your own x402 agentic service provider, consume hundreds of services. Multichain. Nanopayments. Circle CLI.

Today, we launched Circle Agent Stack, and I want to explain the core problem this solves. AI agents can browse, reason, write code, call tools, and complete tasks. But they still struggle with one very basic thing: paying for services on the internet. Let’s say an agent needs to call a paid API. That sounds simple. But the normal internet payment flow is built for humans. - Create account. - Add card. - Choose plan. - Go through checkout. - Approve payment. - Wait for access. That works for people. It does not work for autonomous software. An agent does not need a checkout page. It needs a wallet, a price, and a payment protocol. That is what Circle Agent Stack enables. With Agent Wallets, developers can give AI agents wallets funded with USDC. With Circle CLI and Circle Skills, agents in tools like Codex, Claude Code, and Cursor can discover services and transact programmatically. And with Nanopayments powered by Circle Gateway, agents can pay for APIs, data, compute, and services in real time. This matters because the natural pricing model for agentic services is usage-based. Agents should be able to pay for resources at the moment they need them, without being forced through a card form, checkout page, or manual approval flow. From a developer perspective, you can create an agent wallet, fund it with USDC, and let your agent start paying for services. From a seller perspective, your service can accept USDC from agents without forcing them through a human payment flow. The bigger shift is simple: APIs can become paid resources for agents. Software can pay software for useful work. That is agentic commerce. We are live today. Start building here agents.circle.com

Introducing the ARC whitepaper. The paper outlines how ARC could serve as the native coordination asset of the Arc network, supporting security, economic governance, fee mechanics, and broader platform utility as Arc evolves. The core idea: stablecoins move value. Arc provides the execution environment. ARC could help coordinate the participants who depend on the network. Read the whitepaper: arc.network/arc-token-whit…

Applications for the Circle Developer Grants Program are now open. We’re supporting high-caliber teams building production-grade applications on Arc with USDC and the Circle Developer Platform, with a focus on real-world utility and scalable financial infrastructure. Selected teams receive milestone-based funding, technical guidance, co-marketing support, and more. Learn more and apply: circle.com/grant

cbBTC on Base to USDC on World Chain in one flow. @gminoprio of @daimo demos Circle Gateway live and explains what it replaced for teams managing crosschain liquidity.

Proud to partner with Arc & Circle on powering their AppKit.