# Square MCP server

> Work with Square payments, orders, catalog, customers and inventory from your AI assistant through the Square API platform.

- Listing: https://mcp.tc/i/square
- Connect: use the server's own URL `https://mcp.squareup.com/mcp` (OAuth sign-in at the server); clients connect to it directly. The listing link is a page, not an MCP endpoint.
- Type: remote (Streamable HTTP)
- Auth: OAuth sign-in
- Category: [Finance & Payments](https://mcp.tc/c/finance-payments)
- Vendor: Square (Block)
- Verified: yes, mcp.tc checked that this is the official server (https://mcp.tc/verify). It says who runs the server, not that it is safe.
- Homepage: <https://developer.squareup.com/docs/mcp>

## About

The Square MCP server connects AI assistants to the Square REST API platform. It gives programmatic access to Square data such as customers, orders and catalog items, so you can ask natural language questions and run actions against a Square account.

The server is hosted by Block at https://mcp.squareup.com/mcp using streamable HTTP, and users sign in with OAuth. A local version can also be run from the square/square-mcp-server repository. The documentation marks the server as Beta.

## What it can do

- Access Square API data through an AI assistant
- Work with customers and orders
- Work with catalog items
- Use natural language queries against a Square account
- Connect from Claude, Cursor, Windsurf or Goose

## Example prompts

- "List my most recent Square orders"
- "Find the customer record for jane@example.com in Square"
- "Show the items in my Square catalog"
- "Check inventory counts for my top products in Square"

## Install

### Claude Code

1. Run this in a terminal, in your project folder:

```bash
claude mcp add --transport http square https://mcp.squareup.com/mcp
```

2. Start Claude Code, type `/mcp`, pick **square** and choose **Authenticate**. A browser window opens for the Square (Block) sign-in.

Add `--scope user` to make it available in every project, not just this one.

### Claude Desktop

1. Open **Settings → Connectors** and click **Add custom connector**.

2. Name it **Square** and paste this URL:

```url
https://mcp.squareup.com/mcp
```

3. Click **Add**, then **Connect**, and sign in when Square (Block) asks.

Claude Desktop’s JSON config file only starts local servers. Remote servers go through Connectors, and connectors you add on claude.ai show up here too.

### claude.ai

1. Open the connector form on claude.ai. This button fills in the name and URL for you:

[Add to claude.ai](<https://claude.ai/customize/connectors?modal=add-custom-connector&connectorName=Square&connectorUrl=https%3A%2F%2Fmcp.squareup.com%2Fmcp>) (opens connector settings)

2. Check that the URL reads `https://mcp.squareup.com/mcp` and click **Add**.

3. Click **Connect** and sign in when Square (Block) asks.

Free plans allow one custom connector. On Team and Enterprise plans an owner adds it under **Organization settings → Connectors**.

### ChatGPT

1. On chatgpt.com, open **Settings → Security and login** and turn on **Developer mode**.

2. Go to `chatgpt.com/plugins` and click **+** to create an app for a remote MCP server.

3. Paste `https://mcp.squareup.com/mcp` as the server URL and choose **OAuth**. ChatGPT sends you to Square (Block) to sign in.

Developer mode is available on the web for Plus, Pro, Business, Enterprise and Education accounts.

### Cursor

[Add to Cursor](<https://cursor.com/install-mcp?name=square&config=eyJ1cmwiOiJodHRwczovL21jcC5zcXVhcmV1cC5jb20vbWNwIn0%3D>) (opens Cursor)

Or add it by hand to `~/.cursor/mcp.json` (all projects) or `.cursor/mcp.json` (this project):

`mcp.json`:

```json
{
  "mcpServers": {
    "square": {
      "url": "https://mcp.squareup.com/mcp"
    }
  }
}
```

Cursor shows **Needs login** next to the server. Click it to sign in.

### VS Code

[Install in VS Code](<https://vscode.dev/redirect/mcp/install?name=square&config=%7B%22type%22%3A%22http%22%2C%22url%22%3A%22https%3A%2F%2Fmcp.squareup.com%2Fmcp%22%7D>) (opens VS Code)

Or from a terminal:

```bash
code --add-mcp '{"name":"square","type":"http","url":"https://mcp.squareup.com/mcp"}'
```

Or commit it to the repo in `.vscode/mcp.json`:

`.vscode/mcp.json`:

```json
{
  "servers": {
    "square": {
      "type": "http",
      "url": "https://mcp.squareup.com/mcp"
    }
  }
}
```

VS Code asks you to sign in the first time the server starts.

### Devin Desktop

1. Add it to `~/.config/devin/mcp_config.json` (macOS and Linux) or `%APPDATA%\devin\mcp_config.json` (Windows):

`mcp_config.json`:

```json
{
  "mcpServers": {
    "square": {
      "serverUrl": "https://mcp.squareup.com/mcp"
    }
  }
}
```

2. Refresh the MCP server list in Cascade and sign in when asked.

Devin Desktop is the new name for Windsurf. It reads `serverUrl` (or `url`) for remote servers.

### Codex

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

Or edit `~/.codex/config.toml` directly:

`config.toml`:

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

### Gemini CLI

```bash
gemini mcp add --transport http square https://mcp.squareup.com/mcp
```

Then, inside Gemini CLI, run `/mcp auth square` to sign in.

This adds it to the current project. Add `-s user` to use it everywhere.

### Any client

Most clients accept this shape. Some name the URL field differently: `serverUrl` in Devin Desktop, `httpUrl` in Gemini CLI’s settings file.

```json
{
  "mcpServers": {
    "square": {
      "type": "http",
      "url": "https://mcp.squareup.com/mcp"
    }
  }
}
```

Zed puts servers under `context_servers` in its settings. Cline needs `"type": "streamableHttp"`, or it assumes SSE.

Client only starts local servers? Bridge it with `npx -y mcp-remote https://mcp.squareup.com/mcp`.

## Details

- Last checked: 2026-10-03 (reachable, asks for credentials)
- Listed: 2026-10-03
- Updated: 2026-10-03

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Source: https://mcp.tc/i/square (mcp.tc is an independent directory, not affiliated with this server's publisher). Corrections: https://mcp.tc/report