Precious Iheanacho

[Jeremy Allaire - jerallaire.arc @jerallaire]

The energy in London is fantastic. We hosted Circle in London this week with hundreds of partners, developers and the broader financial ecosystem. UK continues to advance in crypto and digital assets.

[Arc @arc]

Arc 🤝 Pyth

@PythNetwork is delivering high-frequency, proprietary financial data for developers building on Arc Testnet.

This gives builders the precision and reliability needed to power real-time applications across DeFi, trading, and next-gen financial infrastructure.

→ Low-latency price feeds from market participants
→ High-fidelity data for advanced financial use cases
→ Infrastructure designed to accelerate new asset listings'

Arc is built for performance.

Designed for financial applications that cannot afford delay.

[Arc @arc]

Arc 🤝 Chainlink

Arc has joined the @Chainlink Scale program to provide developers with secure access to premium enterprise-grade infrastructure.

Builders on Arc can now leverage Chainlink’s enterprise-grade suite of services to power advanced onchain applications, including:

→ CCIP
→ Data Streams
→ Data Feeds
→ Proof of Reserve

Arc is built for composable applications from day one.

[Arc @arc]

At @AIAgentsSummit Berlin, developers explored what happens when AI agents can do more than generate outputs.

Using Circle Agent Stack, builders showed agents that could hold wallets, manage budgets, discover paid services, pay for APIs or data, coordinate workflows, and return receipts.

Agents are starting to look like economic participants.

They need:
→ Wallets
→ Budgets
→ Low-cost payments
→ Programmable settlement
→ Receipts
→ Infrastructure for repeatable machine-to-machine activity

That is the kind of future Arc is being built to support.

[Sam | Circle and Arc Dev Community @samconnerone]

Builders are choosing @arc for their home for Agents!!

New from @Xylonet_!!

If you're building AI agents, MCP servers, developer tools, or APIs, they’d love for you to test it and share your feedback.

🔗 https://t.co/IneIerpqHX

[Circle @circle]

An agent needs a paid service to complete a task.

It pays 0.007 USDC and continues automatically.

No sign-up flow. No card. No workflow breaking at the paywall. Just USDC.

Powered by Circle Agent Stack: https://t.co/mgetHsAe1r

[Arc @arc]

We built an open-source DeFi lend / borrow sample app on Arc Testnet.

It gives developers a simple starting point for experimenting with cirBTC collateral and USDC borrowing.

The sample includes:
→ Deposit cirBTC as collateral
→ Borrow USDC against it
→ Review a basic DeFi smart contract
→ Explore a Next.js frontend
→ Extend the flow for credit, treasury, or collateralized finance use cases

Explore the repo and show us what you’re building: https://t.co/Pgw21GD2Se

[Arc @arc]

New guide for teams building unified USDC balance flows with Gateway.

If you’ve already integrated Gateway directly, or are exploring a new implementation, this guide maps core flows to App Kits’ kit.unifiedBalance.* methods:

→ Deposits
→ Balances
→ Transfers
→ Forwarding
→ Delegate flows

Includes a migration checklist, lookup table, detailed notes, and guidance on when to use Gateway contracts and APIs directly.

https://t.co/eHzLNeIR5i

[Circle @circle]

Circle Agent Stack helps developers build agents that can do more than generate text.

In this guide, an agent uses Circle Agent Wallet to:
→ Find a paid voice-call service
→ Pay for the resources it needs in USDC
→ Place the call
→ Return a transcript, recording URL, and spend details
→ Run the workflow on a recurring schedule

Agents are moving from planning work to completing work.

Read the guide: https://t.co/kiTUwkbbgz

[Circle @circle]

Circle has long believed money becomes more useful when software can move it, program it, and enforce terms directly.

Jeremy Allaire explains how Arc extends that idea into an economic operating system for people, businesses, and AI agents.

[Arc @arc]

The Arc team joined builders in New York for ETHGlobal NYC, with 15,000 USDC in prizes for teams building on Arc.

Across six tracks, 65 teams shipped apps and primitives exploring:
→ Advanced stablecoin logic
→ Chain-abstracted USDC flows
→ Prediction markets
→ Agentic economy use cases
→ Arc integrations for existing projects

The creativity, ambition, and quality of the submissions stood out.

Here’s what the winning teams built:

🏆 Best Agentic Economy with Circle Agent Stack

Mars: On-chain audited marketplace where AI agents safely buy verified skills.
Submission Showcase: https://t.co/ku35ztsvqS

Sidekick: Perpetual futures built for AI agents, not humans. Per-block funding, no liquidations, on Arc.
Submission Showcase: https://t.co/GLrxOYbOyN

🏆 Best Smart Contracts on Arc with Advanced Stablecoin Logic

OpenPop: The OpenClaw of verifiable agent workflows, lowers capital costs by turning invoice financing into deals for investors.
Submission Showcase: https://t.co/ktlemxBl9e

WorldColony: A colony of 200 AI "ant" agents that research, debate and bet on World Cup matches, fully on-chain.
Submission Showcase: https://t.co/87P3pBK4Lm

🏆 Best Chain-Abstracted USDC Apps Using Arc as a Liquidity Hub

Vouch DeFi: Zero-collateral credit backed by who you are, not what you own. Private AI, USDC on Arc.
Submission Showcase: https://t.co/654ji4oAPS

AnyAsset Checkout : Checkout links where any EVM asset becomes a merchant-settled USDC.
Submission Showcase: https://t.co/L5HY2ntNep

🏆 Best Prediction Markets Built on Arc with Real-World Signal

Cumulant : Structured products on prediction markets - baskets, tranches, PPNs, & continuous markets.
Submission Showcase: https://t.co/xx9zHB7cQa

🏆 Best Private Nanopayments (in partnership with Dynamic and Unlink)
Manila: Private, on-chain, programmable, and agentic USDC payroll and vesting on Arc.
Submission Showcase: https://t.co/rxdtaP4tiW

Slip: Send money by email/phone; recipients claim privately as local stablecoins, no wallet needed.
Submission Showcase: https://t.co/hXxubj8VuM

🏆 Arc Continuity Track

Thurman Protocol: Automated secondary loan sales with onchain USDC settlement and trustless execution.
Submission Showcase: https://t.co/WTg9n7RbrL

Bitrouter: DeFi micro-savings app that rounds-up daily purchases into AI-optimized yield.
Submission Showcase: https://t.co/0Ymz7WnWU2

Thanks to all the teams that took part and congratulations to the winners!

The Arc builder ecosystem keeps growing.

[Arc @arc]

Building a global app often means building for multiple currencies.

We built an open-source stablecoin FX sample app on Arc testnet to make that easier.

With AppKit Swaps and Circle Wallets, developers can enable swaps between USDC, EURC, and cirBTC with less integration work.

Use it as a starting point for:
→ Payments
→ Treasury
→ Marketplaces
→ Consumer apps
→ Multi-currency product experiences

Explore the repo and show us what you’re building: https://t.co/6YvnahHf5Y

[Sam | Circle and Arc Dev Community @samconnerone]

This warms my heart so much.

We’re building a real community that in many ways has gone beyond the tech.

Praying to see a trail of successful architects evolving in the form of builders, speakers, future VCs, entrepreneurs, business executives and most importantly…

great human beings.

[Sam | Circle and Arc Dev Community @samconnerone]

Built on @arc

The AI agent angle here is what caught me.

If agents are going to do real work, they’ll need a way to get hired, complete tasks, and get paid.

@Arclancerxyz building around that with USDC escrow is pretty interesting.

[Circle @circle]

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.

[Sam | Circle and Arc Dev Community @samconnerone]

Shout to @mous68881 and team for putting on this Regional Kickoff in Arc House for our France Chapter!!

Currently in breakout room 2 😬

What a time to be alive!!! @arc

[Arc @arc]

Vyper on Arc Testnet shows what comes after agentic payments.

Agents need more than wallets. They need identity, settlement, and programmable controls.

@vyperlang is building toward agentic economic workflows with:

→ ERC-8004 agent identity
→ x402 payment flows
→ USDC settlement
→ Escrow, subscriptions, splits, and spending limits

A blueprint for agents that transact under rules, not just send funds.

https://t.co/0NL6OHW5QY

[Arc @arc]

Privacy on Arc: What Builders Should Know https://t.co/0u7owUZnMW

[Arc @arc]

Arc Transaction Memos are now available on Arc Testnet.

Memo-enabled calls add structured context to contract execution, preserve sender attribution, and only emit memo events when the contract call succeeds.

Use them to:
→ Add invoice IDs, payout refs, or customer IDs
→ Track payment context onchain
→ Make payments easier to reconcile

Start building: https://t.co/09eTztWiuV

[Arc @arc]

The benefits of programmable onchain credit on Arc.