Square Model Context Protocol Server (Beta)

This project follows the Model Context Protocol standard, allowing AI assistants to interact with Square's connect API.

Quick Start

Get up and running with the Square MCP server using npx:

``bash


Basic startup

npx square-mcp-server start

With environment configuration

ACCESS_TOKEN=YOUR_SQUARE_ACCESS_TOKEN SANDBOX=true npx square-mcp-server start

local runs

npx /path/to/project/square-mcp-server
`

Replace YOUR_SQUARE_ACCESS_TOKEN with your actual Square access token. You can obtain your access token by following the guide at Square Access Tokens. You can also set environment variables before running the command.

Configuration Options

| Environment Variable | Purpose | Example |
|---------------------|---------|---------|
| ACCESS_TOKEN | Your Square API access token | ACCESS_TOKEN=sq0atp-... |
| SANDBOX | Use Square sandbox environment | SANDBOX=true |
| PRODUCTION | Use Square production environment | PRODUCTION=true |
| DISALLOW_WRITES | Restrict to read-only operations | DISALLOW_WRITES=true |
| SQUARE_VERSION | Specify Square API version | SQUARE_VERSION=2025-04-16 |

Integration with AI Assistants

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To configure the Square MCP Server with Goose:

`bash


Automatic installation

npx square-mcp-server install

Get URL for manual installation

npx square-mcp-server get-goose-url
`

The install command automatically updates your Goose configuration.

$3

For Claude Desktop integration, see the Model Context Protocol Quickstart Guide. Add this configuration to your claude_desktop_config.json:

`json
{
"mcpServers": {
"mcp_square_api": {
"command": "npx",
"args": [
"square-mcp-server",
"start"
],
"env": {
"ACCESS_TOKEN": "YOUR_SQUARE_ACCESS_TOKEN",
"SANDBOX": "true"
}
}
}
}
`

Tool Reference

The Square MCP Server provides a streamlined set of tools for interacting with Square APIs:

| Tool | Description | Primary Use |
|------|-------------|------------|
| get_service_info | Discover methods available for a service | Exploration and discovery |
| get_type_info | Get detailed parameter requirements | Request preparation |
| make_api_request | Execute API calls to Square | Performing operations |

Service Catalog

Square MCP Server provides access to Square's complete API ecosystem. Check out the Square API Documentation for detailed information about each service:

| Service | Description |
|---------|-------------|
| applepay | Apple Pay integration |
| bankaccounts | Bank account management |
| bookingcustomattributes | Custom attributes for bookings |
| bookings | Appointment booking management |
| cards | Payment card management |
| cashdrawers | Cash drawer management |
| catalog | Catalog management (items, categories, etc.) |
| checkout | Checkout and payment processing |
| customercustomattributes | Custom attributes for customers |
| customergroups | Customer grouping |
| customersegments | Customer segmentation |
| customers | Customer management |
| devices | Square device management |
| disputes | Payment dispute handling |
| events | Event tracking |
| giftcardactivities | Gift card activity tracking |
| giftcards | Gift card management |
| inventory | Inventory tracking |
| invoices | Invoice management |
| labor | Workforce management |
| locationcustomattributes | Custom attributes for locations |
| locations | Location management |
| loyalty | Loyalty program management |
| merchantcustomattributes | Custom attributes for merchants |
| merchants | Merchant account management |
| oauth | Authentication |
| ordercustomattributes | Custom attributes for orders |
| orders | Order management |
| payments | Payment processing |
| payouts | Payout management |
| refunds | Refund management |
| sites | Website integration |
| snippets | Square Online Code integration |
| subscriptions | Subscription management |
| team | Staff management |
| terminal | Square Terminal management |
| vendors | Supplier management |
| webhooksubscriptions | Event notifications |

Usage Pattern

For optimal interaction with the Square API through MCP:

1. Discover: Use get_service_info to explore available methods
`
get_service_info(service: "catalog")
`

2. Understand: Use get_type_info to learn parameter requirements
`
get_type_info(service: "catalog", method: "list")
`

3. Execute: Use make_api_request to perform the operation
`
make_api_request(service: "catalog", method: "list", request: {})
`

Development and Debugging

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The MCP Inspector provides a visual interface for testing:

`bash


Build the project

npm run build

Start the inspector with the Square MCP Server

npx @modelcontextprotocol/inspector node dist/index.js start
`

$3

1. Clone the repository
2. Install dependencies: npm install
3. Start development mode: npm run watch
4. Run the server: node dist/index.js start`
5. Test your changes using the MCP Inspector

Contributing

This repository is auto-generated from Square's OpenAPI Specification. While contributions are welcome, please note that changes will need to be incorporated into the generator that produces this code. Please open an issue to discuss proposed changes before submitting a pull request.