clover-mcp 0.1.1

MCP server for the Clover POS REST API — sales, inventory, orders, customers, and employees for small businesses

clover-mcp

MCP server for the Clover POS REST API — gives AI assistants (Claude, Cursor, etc.) read and safe-write access to a Clover merchant's sales, inventory, orders, and customers.

Status: v1 candidate — 14 tools, both auth modes, 152 tests. Single-merchant, local (stdio). See docs/endpoints.md for the sandbox-verified endpoint contracts.

⚠️ Independent project — not affiliated with, endorsed by, or sponsored by Clover Network, LLC or Fiserv, Inc. "Clover" is a trademark of its respective owner and is used here only nominatively to describe interoperability. Provided as is, without warranty — see Legal & disclaimer.

What it can do

• Sales summaries and payment reports
• Inventory lookups and low-stock alerts
• Order history and open-order inspection
• Customer search and creation
• Safe writes: update item prices, set stock quantities, create customers

What it cannot do (by design): process refunds, capture payments, void charges, delete records. Those stay in the Clover dashboard. Employee/shift reporting and a multi-merchant hosted mode are planned (v1.1 / v2).

Tools

Tool	Kind	Notes
get_merchant_info	read	name, currency, timezone, country
get_sales_summary	read	aggregated window (see Sales summary semantics)
list_payments	read	SUCCESS payments in a window
list_orders / get_order / list_open_orders	read	order history + detail
list_items / get_item / list_low_stock_items	read	inventory + stock
search_customers / get_customer	read	cards never returned
create_customer	write	additive; idempotency dup-check + dry_run
set_item_price_cents	write	optimistic-lock pre-check, bounds, dry_run
set_item_stock_quantity	write	absolute (not delta), pre-check, dry_run

Every tool carries MCP behaviour annotations (readOnlyHint / destructiveHint / idempotentHint) so clients can parallelize reads and prompt before writes.

Install

uvx clover-mcp   # coming soon after PyPI publish

Or from source:

git clone https://github.com/SBolivarLoL/clover-mcp-server
cd clover-mcp-server
uv pip install -e .

Configuration

Copy .env.example to .env and fill in your values:

cp .env.example .env

Required:

Variable	Description
CLOVER_MERCHANT_ID	Your Clover merchant ID
CLOVER_ACCESS_TOKEN	Your Clover API access token

Optional:

Variable	Default	Description
CLOVER_REGION	na	na, eu, or la
CLOVER_SANDBOX	false	true to use the Clover sandbox
CLOVER_AUTH_MODE	token	token or oauth_refresh

Auth modes

• token — paste a static access token. Works for sandbox and single-merchant production use. If the token expires, regenerate it in the Clover Developer Dashboard.
• oauth_refresh — supply a refresh token + OAuth client credentials; the server auto-refreshes on expiry and persists the new token pair to CLOVER_TOKEN_STORE (default: ~/.config/clover-mcp/tokens.json, mode 0600). Clover refresh tokens are single-use, so the rotated pair is written back after each refresh.

Use a least-privilege token. Grant only the permission scopes the tools you actually use require (see the table below). A read-only deployment needs no *_W scopes at all. Don't reuse a production token in sandbox or vice versa.

Claude Desktop setup

Add to ~/Library/Application Support/Claude/claude_desktop_config.json:

{
  "mcpServers": {
    "clover": {
      "command": "uvx",
      "args": ["clover-mcp"],
      "env": {
        "CLOVER_MERCHANT_ID": "your_merchant_id",
        "CLOVER_ACCESS_TOKEN": "your_token",
        "CLOVER_REGION": "na"
      }
    }
  }
}

Cursor setup

Add to .cursor/mcp.json in your project (or ~/.cursor/mcp.json globally):

{
  "mcpServers": {
    "clover": {
      "command": "uvx",
      "args": ["clover-mcp"],
      "env": {
        "CLOVER_MERCHANT_ID": "your_merchant_id",
        "CLOVER_ACCESS_TOKEN": "your_token"
      }
    }
  }
}

Required Clover permissions

Your token must have the following Clover permission scopes:

Permission	Used by
MERCHANT_R	get_merchant_info
ORDERS_R	list_orders, get_order, list_open_orders, get_sales_summary
PAYMENTS_R	list_payments, get_sales_summary
INVENTORY_R	list_items, get_item, list_low_stock_items
INVENTORY_W	set_item_price_cents, set_item_stock_quantity
CUSTOMERS_R	search_customers, get_customer
CUSTOMERS_W	create_customer

Read scopes (*_R) are probed at startup; the server reports any missing ones and exits. Write scopes (*_W) are not probed (a probe would mutate data) — a missing write scope surfaces as a 403 the first time you call that tool. Permission changes on a Clover app require the merchant to reinstall the app.

Sales summary semantics

get_sales_summary makes the accounting explicit so the LLM can explain it:

• Gross = sum of result=SUCCESS payment amounts. FAIL/AUTH/uncaptured PRE_AUTH are excluded.
• Voids and refunds are reported separately (void_count, refund_count, refund_amount) — never silently netted into payment_count.
• Tips and taxes are broken out as their own line items.
• Service charges are summed from orders (Clover does not expose them on payments) and reported as service_charges_collected — requires ORDERS_R.
• Offline payments are included; a note flags the window when any are present.
• Currency comes from the merchant record, never defaulted.
• Windows longer than 90 days are split and concatenated transparently.

Development

uv pip install -e ".[dev]"
pytest
ruff check src/
mypy src/clover_mcp/

Security

See SECURITY.md for the vulnerability disclosure policy.

Legal & disclaimer

This is not legal advice. The notes below describe the project's intent and the operator's responsibilities.

• Not affiliated. This is an independent, community project. It is not affiliated with, endorsed by, or sponsored by Clover Network, LLC or Fiserv, Inc. "Clover" and related marks are trademarks of their respective owners and are used here only nominatively — to state that this software interoperates with the Clover REST API. No Clover logos or branding are used.
• No warranty / no liability. The software is provided "AS IS" under the MIT License, without warranty of any kind. The authors are not liable for any claim, damage, or loss arising from its use — including incorrect data, unintended writes, downtime, or API changes outside the authors' control.
• You operate it; you're responsible. You run this server with your own Clover account and API credentials. You are solely responsible for: complying with Clover's developer/API terms and trademark-usage policy; safeguarding your tokens; and meeting any data-protection (e.g. GDPR/CCPA) and tax obligations for data you access. The write tools modify live merchant data — test in the sandbox first and use least-privilege tokens.
• No card data, no payments. The server never handles payment card data (the shaping layer blocks it) and deliberately cannot capture payments, refund, or void. It is not a PCI-DSS solution.
• Third-party API. This project only calls Clover's public REST API using the operator's credentials; it bundles no Clover SDK or proprietary code. Clover may change or restrict its API at any time, which may break functionality.

License

MIT — see LICENSE.