Kash MCP Server

Kash MCP Server is a server compliant with the MCP (Model Context Protocol), allowing ChatGPT, Claude, and other MCP-compatible clients to connect to a sales recorder system (or POS, cash register).

It provides a simple interface to:

• View sales and revenue
• Create and record receipts
• Manage products and stock
• Generate automated reports through conversational requests

Live Server: https://mcp.kash.click

Connect your cash register to ChatGPT, Claude, or n8n and manage your business simply by talking.

Imagine your cash register understanding your sentences, executing your commands, and analyzing your reports without a single click.
With this intelligent gateway, the free-cash-register.net software becomes compatible with ChatGPT, Claude, and n8n, transforming your interactions into concrete actions.
Just say record an order for two coffees at table 4 or show me the invoice for order 125 and its done.

You can also ask whats my revenue for this week? or who are my best customers on Tuesdays?.
Your favorite assistant communicates directly with your cash register and responds instantly.
This is a new way to run your business: smoother, faster, and incredibly natural.
Your voice becomes your interface, and your assistant becomes your new coworker.

This project exposes the kash.click API as Model Context Protocol (MCP) tools, available over HTTP (Streamable) and/or STDIO.

Features

• Sales: sale_create with support for catalog and free lines.
• Orders : get the order list in the specified date range
• Data (lists): products, departments, department groups, clients, variations, deliveries, payment methods, cashboxes, delivery zones, relay points, discounts, users

Example usage (ChatGPT / Claude MCP)

• Show me todays sales
• Record a sale of 2 coffees and 1 croissant at table 84
• Ten red roses to deliver to Mrs. Dupond at 6:15 PM!
• Generate a cash register report for the week
• Have takeaway sales increased this year?
• Did customer Dupont pay for their order?

Prerequisities

You need to have a free-cash-register.net account.

If you don't have one, you can register at :

https://kash.click/free-pos-software/ChatGPT

Then in the software, you have to get your APIKEY and SHOPID in Setup, Webservices page.

Installation

Claude

Minimum installation

Edit the file claude_desktop_config.json in your Claude Desktop configuration directory:

Windows

%APPDATA%\Claude\claude_desktop_config.json

Mac OS

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

Provide the following content after replacing your SHOPID and APIKEY.

  {
  "mcpServers": {
    "caisse": {
      "command": "npx",
      "args": [
        "caisse-enregistreuse-mcp-server",
        "--shopid=[replaceWithYourSHOPID]",
        "--apikey=[replaceWithYourAPIKEY]"
      ]
    }
  }
}

Install via npx

Create an installation folder and run the following command in your shell:

npx caisse-enregistreuse-mcp-server --shopid=12345 --apikey=abcdef123456

Install via npm

# 1) Dependencies
npm install

# 2) Environment variables (see below)

# 3) Build
npm run build

Configuration

The binary/runner launches src/stdio.ts and communicates via MCP stdin/stdout.
Edit the file claude_desktop_config.json in your Claude Desktop configuration directory
Customize the installation path and set your SHOPID and APIKEY (retrieve them from https://kash.click):

{
  "mcpServers": {
    "caisse": {
      "command": "node",
      "args": [
        "{{PATH_TO_SRC}}/build/stdio.js"
      ],
      "cwd": "{{PATH_TO_SRC}}",
      "env": {
        "SHOPID": "16",
        "APIKEY": "XXXXXXXX"
      }
    }
  }
}

ChatGPT

Requires a workspace account

In Settings Connectors Create Connector, fill in the following:

Once added, the connector will be available in new conversations.

Environment variables

Create a .env file:

APIKEY=XXXXXXXXXXXXXX
SHOPID=XXX

Launch

HTTP Mode (Streamable MCP)

The HTTP mode requires a Redis server.
It is recommended to use the hosted MCP HTTP/WebSocket server available at https://mcp.kash.click:

• POST https://mcp.kash.click/mcp with a JSON-RPC MCP message
• GET https://mcp.kash.click/health { "status": "ok" }
• GET https://mcp.kash.click/.well-known/mcp/manifest.json MCP manifest

Available MCP Tools (excerpt)

sale_create

Creates a sale.

Input (Zod schema, main fields):

• shopId: string, apiKey: string
• payment: number
• deliveryMethod: 0|1|2|3|4|5|6
• idUser?: number | string
• idClient?: number | string
• idtable?: number | string
• idcaisse?: number | string
• numcouverts?: number | string
• publicComment?: string
• privateComment?: string
• pagerNum?: number | string
• client?: {{ firstname?, lastname?, email?, phone?, address?, zip?, city?, country? }}
• `items: Array<
  {{ type:'catalog', productId?, quantity?, titleOverride?, priceOverride?, declinaisons? }}
  | {{ type:'dept', departmentId?, price?, title? }}
  | {{ type:'free', price?, title? }}

  `

Legacy item encoding:

• Catalog: productId_quantity_titleOverride_priceOverride_[...declinaisons]
• Department sale: -<departmentId>_<price>_<title>
• Free line: Free_<price>_<title>
  Sent as itemsList[].

data_list_* (examples)

• data_list_products
• data_list_departments
• data_list_department_groups
• data_list_clients
• data_list_variations
• data_list_delivery_men
• data_list_payments
• data_list_cashboxes
• data_list_delivery_zones
• data_list_relay_points
• data_list_discounts
• data_list_users
• data_list_tables

All accept: {{ format=('json'|'csv'|'html') }}.

Compatible Clients

• ChatGPT (OpenAI) via external MCP configuration
• Claude (Anthropic) via Tools manifest URL
• n8n / Flowise / LangChain import via public URL

MCP Manifest Endpoint

The MCP API exposes a JSON manifest describing all available tools for compatible clients (ChatGPT, Claude, n8n, etc.).

Public manifest URL

https://mcp.kash.click/.well-known/mcp/manifest.json

This URL is the one to provide to your MCP client when configuring the server.

License

1. GNU GENERAL PUBLIC LICENSE