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Circle Agent Stack Quickstart - financial infrastructure for the agentic economy.

# Agentic Economy
# Agent Marketplace
# Agentic Commerce
# Agent Identity
# AI
# developer quickstarts
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Elton Tay
DevRel Lead, APAC @ Circle

SUMMARY

A walkthrough of Circle Agent Stack — the chain- and protocol-agnostic infrastructure for the agentic economy. See how to give your agent a wallet, fund it with USDC, discover services in Agent Marketplace, and settle gasless payments through Circle Gateway. Get started at agents.circle.com.

Introducing Circle Agent Stack: financial infrastructure for the agentic economy.

As agents begin paying for APIs, data, compute, and services in real time, developers need infrastructure designed for programmable, machine-speed transactions.

Agent Stack brings together:

  • ✅ Agent Wallets for controlled access to USDC
  • ✅ Agent Marketplace for discovering agentic services
  • ✅ Circle CLI for repeatable financial actions

Together with Nanopayments powered by Circle Gateway and Circle Skills, Agent Stack helps agents hold funds, discover services, and transact programmatically with USDC.

Explore the site: Agents.circle.com

Learn more: http://www.circle.com/blog/introducing-circle-agent-stack-financial-infrastructure-for-the-agentic-economy

Disclosure

USDC is issued by regulated affiliates of Circle. See Circle’s list of regulatory authorizations.

Circle Technology Services, LLC (“CTS”) is a software provider and does not provide financial, advisory, or marketplace services. Agent Stack enables users and developers to interact with third-party applications and services, which are not controlled by Circle. Transactions initiated by agents are executed based on user-defined permissions and may occur without real-time human review. Circle does not guarantee the performance, availability, or outcomes of any third-party services or agent-initiated transactions. Users are solely responsible for their use of these tools and for evaluating associated risks. For additional details, please see the Circle Developer terms of service, available at agents.circle.com/terms-of-use

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TRANSCRIPT

Elton Tay: AI agents are starting to do more than just answer questions. They are becoming economic actors. They execute transactions, deploy contracts and coordinate multi step workflows without human intervention.

But the financial and identity infrastructure they need does not exist at scale. There is no native payment rails for agents as credit cards require human sign up. There is no way for agents to hold or manage money autonomously as existing wallets require human custody.

There is no end to end stack today for developers to build agentic apps.

That is why CIRCA is building the CIRCA agent stack, a chain and protocol agnostic infrastructure purpose built for agentic economic activity.

It gives agents the ability to hold assets, transact and access services across ecosystems.

In this agent stack, we have the agent wallets that let agents hold and move funds autonomously within predefined policies, Agent Marketplace that gives agents a trusted place to discover, evaluate and pay for services, Circus CLI which is a command line tooling that provides deterministic agent native orchestration and together with NanoPayments powered by Gateway, agents now have the interface, tools and payment rails to hold assets, make transactions, find services and participate in the agentic economy autonomously.

So today, I'm gonna show you the buyer side, how to give your agent a wallet, fund it with USCC, find services in agent marketplace and settle Gaster's USCC payments through Gateway.

So let's get started.

First thing first, head over to agents dot seca dot com. At the top of the page, there's a button called give USCC to your agent. Click on it and the prompt's gonna be copied and then open up your AI coding assistant of your choice. In this case, I'm using Codex and just paste it in and click enter.

So what this what this prompt does is it tells the AI agent to check if the command line interface has been installed and if it has not, go ahead and install it and then check the login status, and then create an agent wallet on base.

So by default, it's going to create a wallet for you on base minute if you do not have a radio wallet.

In this case, I already have a base agent wallet. So and it says that I have no USCC. So your wallet doesn't have any USCC, would you like to fund it now? Okay. Say, sure. I'll like fund it now.

So it's gonna read the funding instructions and it's a proposed ways for you to help fund this wallet. So there's two ways of funding it as of today.

You could either fund it with Fiat or you can fund it through your existing wallet.

So I'm gonna say fund with deposit existing USC.

Okay. So it says use this deposit path, make sure you're on base, use the USDC token, the wallet address is as such.

You can check, double check the USCC contract on base if that is the correct one and then send. So what I'm gonna do now is to send to USDC.

So now I have just sent to USDC to this address and I'm gonna do a check right now. So I have just sent to USDC. Please check my balance.

So now it's gonna do a check and underneath the hood, the circle CLI, command is running as such. You could actually see it was running the balance function. You see that now from zero has now has two USTC which is correct.

But I actually also have USTC in my gateway balance. So how much do I have in my gateway balance?

So it's gonna do the check, but now great. You have followed the setup, you pasted the prompt, you've created a agent agent wallet for your agent, you have funded your agent wallet with USTC, what's next? The next step is actually to fund your gateway balance. Right. Right now, I already have two USTC in my gateway balance, but if you do not have, you could also just prompt it and it will if not, it will also tell you down the road to find your gateway balance. This is because when it comes to paying for citizens down the road, gateway gives you that guest list USCC payments and you're able to do nano payments as well down to the millionth of the dollar.

So that is really, special especially if you wanna use Gateway.

So let's say now you have reached the stage of, you know, depositing USCC into your circuit gateway, and the next step is to ask, what services I'd pay for in the agent marketplace.

In the Sika agent marketplace.

So in the website agents dot seca dot com, there is this services page that lists, at this at this point of time, five hundred and thirty seven different endpoints across forty two different services and this ranges from creative to financial analysis, infrastructure prediction market, social intelligence, web search research, and the list goes on. So these are the services on a seller's site that a buyer could actually buy from And what I'm actually prompting here is asking what services are in this Circuit Agent marketplace.

So great. So if you were to ask, you know, what kind of paid citizens are there in the Circuit Agent marketplace, it's gonna tell you on the things that you can see in the UI, the financial analysis, social intelligence, creative web search and research, prediction markets infrastructure and beyond.

And you can say that you could be paid from either directly on chain on base or through your gateway. But in this case, wanna use gateway because it's gasless and I can make nano payments for free as well. So for the simplicity of this demo, I'm gonna say find a paid endpoint and retrieve for me the ETH price, please.

So the agent came back and provided me the price of ETH and retrieve from the endpoint X42 Alchemy, it paid zero point zero zero one USDC and it paid through the payment rail circuit gateway on base and that's the timestamp.

And if you were to look at how it what happens under the hood because it may seem like magic, is it first run the CLI command services search eve price to find the related services to eve price.

Then it found the Alchemy endpoint and then it first check whether you have enough money to pay for this endpoint and then it realized it cost zero point zero zero one USCC and it has, a support space which I have the USCC on and it calls the pay pay function to, get the data that we want which is the price of ETH and it returns the receipt at the end of this whole process. So so this works. So this is how you can actually enable your AI agent to pay for services in the agent marketplace, in this case getting the ETH price.

There's more endpoints to explore. You can explore either in the CLI or in the website agents. Cyclic dot com slash cyclicis.

And that's the end to end buyer workflow. You give the agent an instruction, it translates the intent into actions through Circle CLI. The CLI connects to the agent wallet where the agent hosts USDC and can top up the associated gateway balance and from there the agent can use the USDC gateway to pay for services in the agent marketplace and then the result comes back to the agent with a receipt for what happened. So that is the Circuit Agent Stack in action, an agent paying for work. If you are a buyer looking to try Circle agent stack, head over to agents dot circle dot com, you know, click the button to copy the prompt, paste it into your agent and follow the flow to give your agent a wallet, find it through USCC and pay for a service. And if you are a seller looking to turn your API into a storefront, scroll down and then click on list your service and then fill up the form and we'll be in touch. So thank you for your time and happy building.

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