MCP server · Finance and crypto

Circle Agent Stack MCP server

Let your AI create USDC wallets, set spending limits, send stablecoins, and pay small web fees.

This is a helper that connects your AI assistant to Circle, a service for handling USDC (a digital dollar). Once it is set up, you can ask your AI in plain words to make a wallet, set a spending cap, or send USDC, and it will do it for you. It is handy for people who work with crypto payments but do not want to click through a dashboard every time.

What is an MCP server? The 30-second version

On its own, your AI can only chat. An MCP server is a small helper program that gives your AI a new skill or a connection to an app. This one connects your AI to Circle's Agent Stack, so it can look up wallets, move USDC, and pay small web fees when you ask. You stay in the conversation, and the helper does the clicking behind the scenes.

What this MCP server does

You type a request in your AI chat, like asking it to make a wallet or send USDC. Your AI passes that request to this helper. The helper talks to Circle through the Circle CLI, a command-line tool from Circle that is already installed on your machine. Circle does the actual work, like creating the wallet or moving the money. Then the helper sends the result back, and your AI shows it to you in the chat.

Flow diagram: you ask your AI “Create a wallet called eva-treasury”, the Circle Agent Stack MCP server connects it to Circle, and you get back wallet ID and address.

Click to zoom

What you can do with it

Create a new USDC wallet for an agent or project
List your wallets and see their USDC balances
Check one wallet's balance and its last 10 transactions
Set a daily spending cap and a per-call cap for paid web requests
Send USDC to another wallet address
Pay an x402-priced web endpoint and get its response

Try asking your AI

“Create a dev wallet called eva-treasury and show me the address”
“List my wallets and their USDC balances”
“Set a $5 daily cap and a $0.10 x402 cap on wallet wal_abc123”
“Send 2 USDC from wal_abc123 to 0x1234...abcd”
“Fetch today's BTC signal from https://signals.example.co/btc and pay up to $0.10”

What it gives back to you

You get back plain answers in the chat. For a new wallet, you see the wallet ID and address. For a balance check, you see the amount and the last few transactions. For a payment, you see the response from the endpoint plus how much USDC was paid.

Before you start

What you need

Node.js installed on your computer
The Circle CLI installed (npm install -g @circle-fin/circle-cli)
A Circle account, logged in with circle login
A Circle API key (a kind of password for apps; Circle gives you one in your account settings)

Good to know

Your Circle API key can move real money, so set a daily cap first, start with dev wallets instead of mainnet, and never share or commit your key.

Install it with your AI

Add Circle Agent Stack MCP server to your AI, no technical skills needed

You don't install anything by hand. You copy one prompt, paste it into an AI that can work on your computer, and it checks, installs and connects the server for you, asking you when it needs something.

Sign in to get the install prompt

Members get a ready-made prompt that lets the Claude desktop app check Circle Agent Stack MCP server, install it and connect it for them, step by step. You don't need any technical skills: you copy, paste and answer a few questions. Your connected AI can also find and install any of the 4,066 MCP servers here for you.