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Circle

v0.2.1API Key

USDC infrastructure: programmable wallets, payouts, and cross-border transfers. Your agent moves stablecoins with instant settlement.

23 tools1 env vars🌐 GLOBALstable on npm

What your agent can do

Circle gives your agent 23 tools it calls directly β€” pick the ones it needs, in Claude, Cursor, or any MCP client.

  • create_wallet β€” Create a new Circle business-account wallet
  • get_wallet β€” Get wallet details by ID
  • list_wallets β€” List all Circle wallets
Example call
// Your agent calls a tool directly β€” no glue code.
// CodeSpar's managed tier handles OAuth2, token rotation and rate limits.
const result = await session.call("create_wallet", { /* ... */ });

Install

terminal
$ npm install @codespar/mcp-circle

Quickstart

Add this entry to your claude_desktop_config.json (or any MCP-compatible client config).

claude_desktop_config.json
{
  "mcpServers": {
    "circle": {
      "command": "npx",
      "args": [
        "-y",
        "@codespar/mcp-circle"
      ],
      "env": {
        "CIRCLE_API_KEY": "<your_circle_api_key>"
      }
    }
  }
}

After restart, your agent can call any of the 23 tools below β€” try create_wallet first.

Environment variables Β· 1

Required to authenticate the server. Stored encrypted when using CodeSpar managed hosting.

CIRCLE_API_KEY
requiredsecret

API key for circle

Available tools Β· 23

Each tool is independent β€” your agent loads only what it needs to reduce context and response time.

WRITEcreate_wallet
Create a new Circle business-account wallet
READget_wallet
Get wallet details by ID
READlist_wallets
List all Circle wallets
WRITEcreate_payment
Accept a USDC payment via Circle
WRITEget_payment
Get payment details by ID
WRITEcreate_payout
Create a payout from Circle (USDC to fiat)
WRITEget_payout
Get payout details by ID
WRITElist_payouts
List payouts with optional filters

Compatible frameworks

MCP is a protocol β€” any framework that speaks it can mount this server.

Claude Agent SDKAnthropic
OpenAI AgentsOpenAI
Vercel AI SDKVercel
LangChainLangChain
LlamaIndexLlamaIndex
CrewAICrewAI
MastraMastra
Any MCP clientProtocol

Frequently asked questions

Run `npx -y @codespar/mcp-circle` and add the config block above to your MCP client β€” Claude, Cursor, VS Code, or any MCP-compatible client. No build step, no SDK required. Prefer hosted? CodeSpar's managed tier runs it for you with auth handled.
Circle β€” MCP server Β· 23 tools | CodeSpar