kubik

Chargeable weight calculator for air, road, sea LCL and courier freight — standard volumetric divisors, custom override, no auth or account needed.

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What it can do

  • Calculate Chargeable Weight: Calculates chargeable (billable) weight for a freight shipment from a list of cargo pieces, for one of four transport modes. For each mode, chargeable weight is the greate

What data it sees

Do you need an account

No: the server works without sign-in

Chargeable weight calculator for air, road, sea LCL and courier freight — standard volumetric divisors, custom override, no auth or account needed. From kubik.tools

How to connect

How to connect kubik to Claude

The server address to paste into Claude settings:

https://kubik--m-kubriak.run.tools

  1. Open Claude (claude.ai or the desktop app).
  2. Go to Settings → Connectors.
  3. Click Add custom connector.
  4. Paste the server address copied below into Remote MCP server URL and click Add.
  5. In a chat, click + → Connectors and switch the new connector on.

Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.

Authorization

After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.

How to connect kubik to ChatGPT

The server address to paste into ChatGPT settings:

https://kubik--m-kubriak.run.tools

  1. Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
  2. Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
  3. Open Settings → Connectors and click Create.
  4. Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
  5. Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
  6. In a new chat open + → Apps/Connectors and enable the connector.

OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.

Authorization

On first use ChatGPT opens the service's sign-in window. Sign in and approve access.

How to connect kubik to Cursor

The server address to paste into Cursor settings:

https://kubik--m-kubriak.run.tools

Fastest: click Open in Cursor below and confirm the prompt.

Manually:

  1. In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
  2. Paste the JSON copied below into ~/.cursor/mcp.json (per project: .cursor/mcp.json in the repo root).
  3. Save the file. The server appears in the MCP list; authorize it there if asked.

Authorization

If the service needs sign-in, an authorize button appears next to the server in the MCP list.

Server tool list (1)

Raw names from tools/list. Only developers need these.

calculate_chargeable_weightCalculates chargeable (billable) weight for a freight shipment from a list of cargo pieces, for one of four transport modes. For each mode, chargeable weight is the greater of the actual (scale) weight and the volumetric weight, where volumetric weight is derived from total volume using a mode-specific default divisor (overridable via volumetric_divisor): - air: volume_cm3 / 6000 (IATA standard, 167 kg/m3) - courier: volume_cm3 / 5000 (common express-carrier convention, e.g. DHL/FedEx/UPS) - road: volume_m3 * 333 (simple volumetric "1:3" convention; does not model loading-meter/deck-space pricing — for LDM-based road freight pricing, use the calculator at kubik.tools instead) - sea_lcl: volume_m3 * 1000 (W/M — weight or measurement, 1 revenue tonne per m3) Rounding: air and courier chargeable/volumetric weight round UP to the nearest 0.5 kg (chargeable_weight_raw_kg gives the unrounded value, chargeable_weight_kg the rounded one). Road and sea_lcl are not rounded up, just reported to 1 decimal place. Returns total actual weight, total volume, volumetric weight, raw and rounded chargeable weight, which one governs, the divisor used, and a one-line human-readable summary. Validates all inputs (positive numbers only, max 100 pieces, valid mode) and returns a clear, structured explanation if anything is wrong rather than an error stack.