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io.github.codespar/mcp-circle MCP Server

io.github.codespar/mcp-circle

Give AI agents access to Circle's USDC wallets, payouts, and transfers via MCP.

What is the io.github.codespar/mcp-circle MCP server?

The io.github.codespar/mcp-circle MCP server exposes Circle's USDC payments platform — wallets, payouts, and transfers — as MCP tools so an AI agent can send and receive stablecoin payments programmatically. It is one of 110+ regional/agentic-payment MCP servers published in the codespar mcp-dev-latam monorepo, installed via the `@codespar/mcp-circle` npm package. It requires a Circle API key for authentication.

mcp-circle is part of the codespar "MCP Dev LATAM" catalog, a large collection of MCP servers that let AI agents operate commerce and financial workflows (payments, fiscal, logistics, messaging, ERP, banking, identity, crypto) across Latin America plus emerging agentic payment protocols. This specific server wraps Circle's USDC infrastructure — wallets, payouts, and transfers — giving an agent the ability to move stablecoin funds as part of an automated business process, alongside other payment rails like Pix, Mercado Pago, or Stripe covered by sibling servers in the same repo. The README does not provide a detailed tool list or setup specifics for mcp-circle itself, only that it is installed via npm and fits into the broader catalog of payment/crypto MCP servers.

How to install io.github.codespar/mcp-circle

Copy-paste configuration for popular MCP clients.

transport: stdio

Config generated by PluginBench — verify against the source before use.

Environment / auth

CIRCLE_API_KEY
required
secret
API key for circle

Claude Desktop

~/Library/Application Support/Claude/claude_desktop_config.json

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

Cursor

~/.cursor/mcp.json

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

Windsurf

~/.codeium/windsurf/mcp_config.json

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

VS Code

.vscode/mcp.json

{
  "servers": {
    "mcp-circle": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@codespar/mcp-circle"
      ],
      "env": {
        "CIRCLE_API_KEY": "<YOUR_CIRCLE_API_KEY>"
      }
    }
  }
}

Claude Code

claude mcp add mcp-circle --env CIRCLE_API_KEY=<YOUR_CIRCLE_API_KEY> -- npx -y @codespar/mcp-circle

Use cases

Programmatically create and manage USDC wallets for an AI agent
Send USDC payouts to recipients as part of an automated business workflow
Transfer USDC funds between wallets or accounts
Integrate stablecoin settlement into a broader multi-step commerce workflow (payment, fiscal, logistics, messaging, ERP, banking)

io.github.codespar/mcp-circle MCP server FAQ

What does the mcp-circle MCP server do?

It connects AI agents to Circle's USDC payments platform, exposing wallet, payout, and transfer functionality as MCP tools so an agent can send, receive, and manage stablecoin funds.

Is mcp-circle free to use?

The package itself is open source (MIT licensed, part of the mcp-dev-latam repo) and free to install, but using it requires a Circle account and API key, and any transaction fees are governed by Circle's own pricing.

How do I install mcp-circle in Claude Desktop or Cursor?

Add it to your MCP client config with the command `npx -y @codespar/mcp-circle` and supply the required Circle API key as an environment variable, similar to how other servers in the repo (e.g., mcp-asaas, mcp-stripe-acp) are configured.

What authentication does mcp-circle require?

It requires a Circle API key, consistent with the API Key auth pattern used by most payment servers in this catalog.

Is mcp-circle specific to Latin America?

No — unlike most servers in the mcp-dev-latam catalog that target specific LATAM countries, mcp-circle wraps Circle's global USDC infrastructure, which can be used for cross-border or stablecoin-based payment flows.

Where can I find the full list of tools for mcp-circle?

The provided README does not include a detailed tool list for mcp-circle specifically; check the package's own README under packages/<category>/circle in the repository or the codespar.dev/servers catalog for full tool documentation.

README (reference)

Source of truth, from the repository.

<h1 align="center">MCP Dev LATAM 🌎</h1> Every commerce API your AI agent needs to run a business in Latin America. Brazil 🇧🇷 · Mexico 🇲🇽 · Argentina 🇦🇷 · Colombia 🇨🇴 · Chile 🇨🇱 · Peru 🇵🇪 · plus 4 agentic payment protocols. 110 MCP servers · 2,300 tools · 6 countries · MIT License <a href="https://codespar.dev/servers">Catalog</a> · <a href="#quick-start">Quick Start</a> · <a href="#agentic-payment-protocols">Agentic Protocols</a> · <a href="#all-servers">All Servers</a> · <a href="docs/CONTRIBUTING.md">Contribute</a> <a href="https://opensource.org/licenses/MIT"><img src="https://img.shields.io/badge/License-MIT-blue.svg" alt="License: MIT"></a> <img src="https://img.shields.io/badge/servers-110-green" alt="110 servers"> <img src="https://img.shields.io/badge/tools-2,300-orange" alt="2300 tools"> <img src="https://img.shields.io/badge/countries-6-blue" alt="6 countries"> <img src="https://img.shields.io/badge/MCP-compatible-purple" alt="MCP compatible">

The Problem

AI agents can write code, analyze data, and chat. But they can't operate a business — collect payments, issue invoices, ship products, or notify customers. Especially not in Latin America, where every service has its own API, auth pattern, and quirks (mTLS for BACEN Pix v2, JWT-RSA for STP-SPEI, AFIP web services, contract-gated developer portals, and on).

Meanwhile, four agentic payment protocols are shipping in parallel — checkout protocols (Stripe ACP, Google UCP), authorization layers (AP2), and micropayment rails (x402) — and none of them compose cleanly with each other or with the regional rails businesses actually run on.

MCP Dev LATAM bridges both gaps. Traditional LATAM services + the new agentic payment protocols, all accessible through a single MCP interface.

The Solution

Each MCP server in this repo wraps a real provider — payments, fiscal, logistics, messaging, banking, ERP, identity, fraud, crypto, and the agentic protocols — so your agent can operate a complete business workflow.

🛒 Customer places order
  → 💳 Agent charges via Pix (Asaas / Mercado Pago / Zoop)
  → 📄 Agent issues NFe (Nuvem Fiscal / Focus NFe / NFe.io)
  → 📦 Agent generates shipping label (Melhor Envio / Skydropx)
  → 📱 Agent sends tracking via WhatsApp (Z-API / WhatsApp Cloud)
  → 📊 Agent records in ERP (Omie / Bling / Tiny)
  → 🏦 Agent reconciles balance (Stark Bank / Itaú / BTG)

Six systems. Zero human intervention. One agent.

Agentic Payment Protocols

Four servers that bridge the emerging agentic payment stack:

Protocol	Server	Tools	What it does
Google UCP	`@codespar/mcp-ucp`	20	Universal Commerce Protocol — agentic shopping, cart, checkout, orders, delivery, identity. Google's full commerce stack for AI agents.
Stripe ACP	`@codespar/mcp-stripe-acp`	24	Agentic Commerce Protocol — AI agent checkout, payment delegation, products, invoices. Live in ChatGPT with 1M+ Shopify merchants.
x402	`@codespar/mcp-x402`	10	HTTP-native micropayments by Coinbase — when an agent hits a 402, it pays USDC on Base/Solana and retries. Pure HTTP, no checkout UI.
AP2	`@codespar/mcp-ap2` <sub>alpha</sub>	22	Google's Agent-to-Agent Payment Protocol — authorization, audit trails, scoped spend limits. 60+ partners including Visa, Mastercard, Stripe, PayPal.

The Autonomy Spectrum

Each protocol sits at a different level of agent autonomy:

 Human-in-loop ◄──────────────────────────────► Fully autonomous

  ┌─────────┐   ┌─────────┐   ┌─────────┐   ┌─────────┐
  │   ACP   │   │   UCP   │   │   AP2   │   │   x402  │
  │ Stripe  │   │ Google  │   │ Google  │   │Coinbase │
  └─────────┘   └─────────┘   └─────────┘   └─────────┘
  User confirms   Commerce     User sets      No user.
  every purchase  lifecycle    rules, agent   Machine-to-
  in-chat         managed      acts within    machine at
                  by agent     budget/scope   HTTP layer

The Convergence Stack

┌─────────────────────────────────────────────┐
│  Application Layer        ACP / UCP         │  Chat UX, product discovery
├─────────────────────────────────────────────┤
│  Authorization Layer      AP2 / Mandates    │  Spend limits, audit trails
├─────────────────────────────────────────────┤
│  Tool Layer               MCP  ◄── WE ARE  │  Standardized agent tools
├─────────────────────────────────────────────┤
│  Settlement Layer         x402 / Pix / Card │  On-chain or traditional rails
└─────────────────────────────────────────────┘

MCP Dev LATAM sits at the Tool Layer — the middleware that connects every application, authorization, and settlement protocol through one interface.

Why this matters

Agent needs to buy something
  ├── Full commerce?       → Google UCP (search → cart → checkout → delivery)
  ├── Retail checkout?     → Stripe ACP (create_checkout → complete_checkout)
  ├── API micropayment?    → x402 (pay_request → USDC $0.001 → data returned)
  ├── Agent-to-agent?      → AP2 (authorize_payment → execute_payment)
  └── LATAM merchant?      → Asaas / Mercado Pago / Conekta / Wompi / etc.

All via MCP. Same interface. One agent.

Quick Start

With Claude Desktop

Add to ~/.config/claude/claude_desktop_config.json:

{
  "mcpServers": {
    "stripe-acp": {
      "command": "npx",
      "args": ["-y", "@codespar/mcp-stripe-acp"],
      "env": {
        "STRIPE_API_KEY": "sk_test_..."
      }
    },
    "asaas": {
      "command": "npx",
      "args": ["-y", "@codespar/mcp-asaas"],
      "env": {
        "ASAAS_API_KEY": "your-api-key",
        "ASAAS_SANDBOX": "true"
      }
    }
  }
}

For alpha packages (contract-gated providers like Itaú, Bradesco, Santander, Caixa, BB, BTG, C6, Sicoob, Bradesco, Matera), add @alpha to the install:

npx -y @codespar/mcp-itau@alpha

With any MCP client

npx @codespar/mcp-stripe-acp        # Agentic Commerce Protocol
npx @codespar/mcp-ucp                # Google Universal Commerce Protocol
npx @codespar/mcp-x402               # HTTP micropayments (Coinbase)
npx @codespar/mcp-ap2@alpha          # Agent-to-Agent payment authorization

npx @codespar/mcp-asaas              # BR billing + Pix
npx @codespar/mcp-mercado-pago       # LATAM payments
npx @codespar/mcp-nuvem-fiscal       # NFe / NFSe
npx @codespar/mcp-melhor-envio       # Multi-carrier shipping
npx @codespar/mcp-z-api              # WhatsApp messaging
npx @codespar/mcp-omie               # ERP
npx @codespar/mcp-stark-bank         # Banking
npx @codespar/mcp-brasil-api         # CEP, CNPJ (no key needed!)

Try it now (no API key)

BrasilAPI and BCRA are public — no key required. Try it in your terminal:

npx @codespar/mcp-brasil-api

Then ask your agent: "What is the address for CEP 01001-000?" or "Look up CNPJ 00.000.000/0001-91".

The Complete Loop

This is what makes the LATAM catalog different — not individual connectors, but a complete business workflow across verticals:

Step	Vertical	Example providers	What the agent does
1	💳 Payment	Asaas / Mercado Pago / Zoop	Creates Pix charge, splits to sellers
2	📄 Fiscal	Nuvem Fiscal / NFe.io / Focus NFe	Issues NFe/NFSe when payment confirmed
3	📦 Logistics	Melhor Envio / Correios / Skydropx	Quotes shipping, generates label
4	📱 Messaging	Z-API / WhatsApp Cloud / Twilio	Sends tracking via customer's preferred channel
5	📊 ERP	Omie / Bling / Tiny / Conta Azul	Records order, updates inventory
6	🏦 Banking	Stark Bank / Itaú / BTG	Reconciles balance, creates reports

To orchestrate all six steps with governance, approval workflows, and audit trails — use CodeSpar.

All Servers

Browse the full catalog at codespar.dev/servers. Each server has its own README, env-var requirements, and tool reference under packages/<category>/<slug>/.

💳 Payments (40 servers)

Server	Tools	npm	Auth
Mercado Pago	30	`@codespar/mcp-mercado-pago`	API Key
Stripe	30	`@codespar/mcp-stripe`	API Key
Zoop	28	`@codespar/mcp-zoop`	API Key
Adyen	25	`@codespar/mcp-adyen`	API Key
Asaas	24	`@codespar/mcp-asaas`	API Key
Pagseguro	24	`@codespar/mcp-pagseguro`	API Key
Stripe ACP	24	`@codespar/mcp-stripe-acp`	API Key
Iugu	23	`@codespar/mcp-iugu`	API Key
Openpay	23	`@codespar/mcp-openpay`	API Key
AP2 <sub>alpha</sub>	22	`@codespar/mcp-ap2`	API Key
Braintree	22	`@codespar/mcp-braintree`	API Key
Braspag	22	`@codespar/mcp-braspag`	API Key
Cielo	22	`@codespar/mcp-cielo`	API Key
Inter Bank	22	`@codespar/mcp-inter-bank`	OAuth2
Mercado Libre	22	`@codespar/mcp-mercado-libre`	API Key
Nubank <sub>alpha</sub>	22	`@codespar/mcp-nubank`	OAuth2
Nupay	22	`@codespar/mcp-nupay`	OAuth2
Pagar Me	22	`@codespar/mcp-pagar-me`	API Key
Rapyd	22	`@codespar/mcp-rapyd`	API Key
Rede <sub>alpha</sub>	22	`@codespar/mcp-rede`	API Key
Safrapay <sub>alpha</sub>	22	`@codespar/mcp-safrapay`	OAuth2
Worldpay <sub>alpha</sub>	22	`@codespar/mcp-worldpay`	API Key
Khipu <sub>alpha</sub>	21	`@codespar/mcp-khipu`	API Key
Stone	21	`@codespar/mcp-stone`	API Key
Wise	21	`@codespar/mcp-wise`	API Key
Airwallex	20	`@codespar/mcp-airwallex`	OAuth2
Culqi	20	`@codespar/mcp-culqi`	API Key
Getnet	20	`@codespar/mcp-getnet`	OAuth2
Izipay <sub>alpha</sub>	20	`@codespar/mcp-izipay`	API Key
Picpay <sub>alpha</sub>	20	`@codespar/mcp-picpay`	API Key
UCP	20	`@codespar/mcp-ucp`	API Key
Vindi	20	`@codespar/mcp-vindi`	API Key
Paypal	19	`@codespar/mcp-paypal`	OAuth2
Transbank <sub>alpha</sub>	19	`@codespar/mcp-transbank`	API Key
Celcoin	18	`@codespar/mcp-celcoin`	API Key
dLocal	18	`@codespar/mcp-dlocal`	API Key
Ebanx	18	`@codespar/mcp-ebanx`	API Key
Efi	18	`@codespar/mcp-efi`	API Key
Pix BCB	18	`@codespar/mcp-pix-bcb`	API Key
Chargebee	15	`@codespar/mcp-chargebee`	API Key

🏦 Banking (12 servers)

Server	Tools	npm	Auth
Stark Bank	27	`@codespar/mcp-stark-bank`	API Key
Caixa <sub>alpha</sub>	23	`@codespar/mcp-caixa`	OAuth2
Santander <sub>alpha</sub>	23	`@codespar/mcp-santander`	OAuth2
Bradesco <sub>alpha</sub>	22	`@codespar/mcp-bradesco`	OAuth2
Itau <sub>alpha</sub>	22	`@codespar/mcp-itau`	OAuth2
Matera <sub>alpha</sub>	22	`@codespar/mcp-matera`	OAuth2
Dock <sub>alpha</sub>	20	`@codespar/mcp-dock`	OAuth2
Open Finance	18	`@codespar/mcp-open-finance`	API Key
C6 <sub>alpha</sub>	14	`@codespar/mcp-c6`	OAuth2
Banco Do Brasil <sub>alpha</sub>	13	`@codespar/mcp-banco-do-brasil`	OAuth2
Sicoob <sub>alpha</sub>	13	`@codespar/mcp-sicoob`	OAuth2
BTG <sub>alpha</sub>	12	`@codespar/mcp-btg`	OAuth2

📄 Fiscal (Brasil) (4 servers)

Server	Tools	npm	Auth
Nuvem Fiscal	24	`@codespar/mcp-nuvem-fiscal`	API Key
Nfe Io	22	`@codespar/mcp-nfe-io`	API Key
Conta Azul	20	`@codespar/mcp-conta-azul`	API Key
Focus Nfe	19	`@codespar/mcp-focus-nfe`	API Key

📱 Communication (8 servers)

Server	Tools	npm	Auth
Z API	27	`@codespar/mcp-z-api`	API Key
Evolution API	25	`@codespar/mcp-evolution-api`	API Key
Twilio	22	`@codespar/mcp-twilio`	API Key
Whatsapp Cloud	22	`@codespar/mcp-whatsapp-cloud`	API Key
Sendgrid	20	`@codespar/mcp-sendgrid`	API Key
Rd Station	18	`@codespar/mcp-rd-station`	API Key
Take Blip	18	`@codespar/mcp-take-blip`	API Key
Zenvia	18	`@codespar/mcp-zenvia`	API Key

📦 E-commerce / Logistics (7 servers)

Server	Tools	npm	Auth
Vtex	33	`@codespar/mcp-vtex`	API Key
Shopify	28	`@codespar/mcp-shopify`	API Key
Amazon <sub>alpha</sub>	24	`@codespar/mcp-amazon`	OAuth2
Shopee <sub>alpha</sub>	22	`@codespar/mcp-shopee`	API Key
Correios <sub>alpha</sub>	21	`@codespar/mcp-correios`	API Key
Melhor Envio	18	`@codespar/mcp-melhor-envio`	API Key
SuperFrete	11	`@codespar/mcp-superfrete`	API Key

📊 ERP / Accounting (5 servers)

Server	Tools	npm	Auth
Omie	30	`@codespar/mcp-omie`	API Key
Bling	28	`@codespar/mcp-bling`	API Key
Xero	24	`@codespar/mcp-xero`	API Key
Quickbooks	22	`@codespar/mcp-quickbooks`	API Key
Tiny	21	`@codespar/mcp-tiny`	API Key

🪪 Identity & KYC (5 servers)

Server	Tools	npm	Auth
Brasil API	24	`@codespar/mcp-brasil-api`	No auth
Jumio	20	`@codespar/mcp-jumio`	API Key
Onfido	20	`@codespar/mcp-onfido`	API Key
Persona	20	`@codespar/mcp-persona`	API Key
Unico <sub>alpha</sub>	18	`@codespar/mcp-unico`	OAuth2

🛡️ Fraud & Risk (4 servers)

Server	Tools	npm	Auth
Sift <sub>alpha</sub>	20	`@codespar/mcp-sift`	API Key
Clearsale <sub>alpha</sub>	18	`@codespar/mcp-clearsale`	API Key
Konduto <sub>alpha</sub>	18	`@codespar/mcp-konduto`	API Key
Legiti <sub>alpha</sub>	18	`@codespar/mcp-legiti`	API Key

🪙 Crypto / Stablecoins (9 servers)

Server	Tools	npm	Auth
Circle	23	`@codespar/mcp-circle`	API Key
Foxbit	21	`@codespar/mcp-foxbit`	API Key
Bitso	20	`@codespar/mcp-bitso`	API Key
Mercado Bitcoin	20	`@codespar/mcp-mercado-bitcoin`	API Key
Moonpay	20	`@codespar/mcp-moonpay`	API Key
Unblockpay	13	`@codespar/mcp-unblockpay`	API Key
Coinbase Commerce	18	`@codespar/mcp-coinbase-commerce`	API Key
Transak <sub>alpha</sub>	18	`@codespar/mcp-transak`	API Key
x402	10	`@codespar/mcp-x402`	API Key

🇦🇷 Argentina (5 servers)

Server	Tools	npm	Auth
Tienda Nube	24	`@codespar/mcp-tienda-nube`	API Key
Colppy <sub>alpha</sub>	22	`@codespar/mcp-colppy`	API Key
AFIP <sub>alpha</sub>	20	`@codespar/mcp-afip`	API Key
Andreani <sub>alpha</sub>	18	`@codespar/mcp-andreani`	API Key
BCRA	16	`@codespar/mcp-bcra`	No auth

🇨🇴 Colombia (5 servers)

Server	Tools	npm	Auth
Siigo	22	`@codespar/mcp-siigo`	API Key
Wompi	22	`@codespar/mcp-wompi`	API Key
Alegra	20	`@codespar/mcp-alegra`	API Key
Coordinadora <sub>alpha</sub>	19	`@codespar/mcp-coordinadora`	API Key
Nequi <sub>alpha</sub>	16	`@codespar/mcp-nequi`	OAuth2

🇲🇽 Mexico (6 servers)

Server	Tools	npm	Auth
Belvo	24	`@codespar/mcp-belvo`	API Key
Skydropx	23	`@codespar/mcp-skydropx`	API Key
Conekta	21	`@codespar/mcp-conekta`	API Key
Bind ERP	20	`@codespar/mcp-bind-erp`	API Key
Facturapi	20	`@codespar/mcp-facturapi`	API Key
STP/SPEI <sub>alpha</sub>	18	`@codespar/mcp-stp-spei`	API Key

Why MCP?

Model Context Protocol is the open standard for connecting AI agents to external tools. Instead of each agent building its own integrations, MCP provides a typed, discoverable interface that works with Claude, ChatGPT, Cursor, VS Code, and more.

AI Agent (Claude, ChatGPT, Cursor)
    ↕
MCP Server (this repo)
    ↕
LATAM API / Agentic Protocol (Stripe ACP, x402, Asaas, Mercado Pago, NFe.io, etc.)

Each MCP server in this repo:

Exposes typed tools with input/output schemas
Handles authentication (OAuth, mTLS, API keys, Basic Auth, JWT-RSA, signed requests)
Supports dual transport — stdio (default) and Streamable HTTP (--http flag)
Compatible with Claude Managed Agents via MCP Connector
Supports sandbox mode for safe testing
Returns structured JSON responses

Running in HTTP mode

Any server can run as an HTTP server for remote/cloud use:

# stdio (default — local, Claude Desktop, Cursor, Claude Code)
npx @codespar/mcp-asaas

# HTTP (remote — Managed Agents, cloud deployments)
npx @codespar/mcp-asaas --http
# or
MCP_HTTP=true npx @codespar/mcp-asaas

HTTP mode exposes /mcp (Streamable HTTP) and /health (status check).

Alpha vs stable

About a third of the catalog ships under the alpha npm dist-tag. These packages have correct tool schemas and auth flow, but the endpoint paths are best-guesses — typically because the provider's developer portal is contract-gated (BR public banks, AR central authority APIs, MX bank-transfer providers). They're flagged with TODO(verify) in source.

npm install @codespar/mcp-itau@alpha

Stable packages (the majority) install with the default tag:

npm install @codespar/mcp-stripe

Status is shown on every package page at codespar.dev/servers and in each package README.

About CodeSpar

CodeSpar builds commerce infrastructure for AI agents in Latin America — an MCP catalog (this repo), a runtime + SDK (@codespar/sdk on npm, codespar on PyPI), and a managed-tier governance product (AgentGate: programmable wallet, policy engine, CFO-grade audit, fiscal-compliance certifications).

Individual MCP servers are useful. Orchestrating many with governance is powerful. That's what CodeSpar does.

Contributing

We welcome contributions. See CONTRIBUTING.md.

Want a server for a service not listed? Open a server-request issue — there's a structured form with name, npm package, docs link, auth flow.

License

MIT

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