# Square (MCP Server)

> Access Square payments, catalog, customers and orders APIs through MCP

- Type: MCP server
- Publisher: Square (official)
- Categories: Finance, Business, Shopping
- Website: https://github.com/square/square-mcp-server
- Source: https://github.com/square/square-mcp-server
- Transport: sse
- Server URL: https://mcp.squareup.com/sse
- Launch command: npx square-mcp-server start
- Sign-in: oauth
- Environment variables: ACCESS_TOKEN, SANDBOX
- GitHub stars: 108
- Listed: 2025-04-23

## About

Square's official MCP server gives agents access to the full Square API surface through three generic tools that discover services, inspect types and make API requests. A hosted remote server with OAuth login is available, or it can be run locally with a Square access token.

## Install

1. **Connect it in ChatGPT** Turn on Developer mode in ChatGPT (Settings → Security and login), open Plugins, select + and paste https://mcp.squareup.com/sse as the MCP server URL, then sign in with OAuth. Add it to a chat from the composer's tools menu.

2. **Or add it to Codex or the API**

   Codex CLI:

   ```bash
   codex mcp add square --url https://mcp.squareup.com/sse
   codex mcp login square
   ```

   config.toml:

   ```toml
   [mcp_servers.square]
   url = "https://mcp.squareup.com/sse"
   ```

   Responses API:

   ```python
   import os
   from openai import OpenAI
   
   client = OpenAI()
   
   response = client.responses.create(
       model="gpt-6-astra",
       tools=[{
           "type": "mcp",
           "server_label": "square",
           "server_url": "https://mcp.squareup.com/sse",
           "authorization": os.environ["ACCESS_TOKEN"],
           "require_approval": "never",
       }],
       input="List my Square locations",
   )
   print(response.output_text)
   ```

## Tools

- `get_service_info`
- `get_type_info`
- `make_api_request`

## Example prompts

- "List my Square locations"
- "Show today's payments at my main location"
- "Add a new item to my catalog priced at $12"
- "Find the customer with email jane@example.com"

## Related

- [Stripe](https://chatgptplugins.directory/mcp/stripe.md): Query and act on your Stripe account and search Stripe docs from any agent
- [monday.com](https://chatgptplugins.directory/mcp/monday-com.md): Create items, update columns, and manage boards in monday.com
- [QuickBooks Online](https://chatgptplugins.directory/mcp/quickbooks-online.md): Read and write QuickBooks customers, invoices, bills and reports
- [Xero](https://chatgptplugins.directory/mcp/xero.md): Work with Xero invoices, contacts, payments, payroll and reports
- [PayPal](https://chatgptplugins.directory/mcp/paypal.md): Manage PayPal invoices, orders, subscriptions, disputes and transactions
- [Massive (Polygon.io)](https://chatgptplugins.directory/mcp/massive.md): Stock, options, forex and crypto market data from Massive, formerly Polygon.io

---
Source: https://chatgptplugins.directory/mcp/square · Index: https://chatgptplugins.directory/llms.txt · Independent and community-run. Not affiliated with or endorsed by OpenAI. ChatGPT is a trademark of OpenAI.