circle-agent-stack-mcp
MCP server for Circle's Agent Stack. Create wallets, set spend policies, send USDC, and pay x402-priced endpoints — all from a tool call.
npx circle-agent-stack-mcpTools
| Tool | What it does |
|---|---|
circle_wallet_create |
Create an agent wallet (dev/hosted/smart) |
circle_wallet_list |
List wallets with USDC balances |
circle_balance |
Balance + last 10 txns for a wallet |
circle_policy_set |
Set daily cap, x402 cap, allow/block lists |
circle_transfer_usdc |
Send USDC to an on-chain address |
circle_x402_pay |
Pay an x402-priced endpoint and return its response |
Quickstart
You need the Circle CLI installed and authenticated:
npm install -g @circle-fin/circle-cli
circle login
export CIRCLE_API_KEY=your_key_hereClaude Desktop
{
"mcpServers": {
"circle": {
"command": "npx",
"args": ["-y", "circle-agent-stack-mcp"],
"env": {
"CIRCLE_API_KEY": "your_key_here"
}
}
}
}Claude Code
claude mcp add circle -- npx -y circle-agent-stack-mcp
