Calculate dimensional weight, box fit, landed costs and freight class for shipping.
Helps small businesses and e-commerce sellers optimize shipping costs. Calculates dimensional weight vs actual weight, finds the smallest box an item fits in, computes landed costs with duty and tax, and estimates US LTL freight class from density. Four tools are free; rate card and free shipping threshold require a license.
Try asking Muse: "Tell me if this 18 by 12 by 10 inch box weighing 6 pounds will be billed on size or weight."
Source: Found in the official MCP Registry (com.moltlinestudio/shipping) · First listed September 24, 2026
Each bar is one check, every 15 minutes. Green means it answered. Last checked 4 h ago.
What Muse can see: It does not ask you to sign in, so it cannot see your accounts. It only sees what Muse sends it from your request.
Before it acts: Read what Muse plans to do before you approve it, and remove the app from Muse when you stop using it.
musedirectory.ai is not part of Meta. More about how Muse handles your information
Not in Muse's Connectors list yet, but Muse can still use it. Copy the request below and paste it into Muse. Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.
https://mcp.moltlinestudio.com/shippingNot in Muse's Connectors list yet. Muse can still use it: its page gives you a request to paste into Muse.
Moltline Shipping Maths is a remote MCP server, so any assistant that can add a custom connector by link can use it. Same link, same tools.
In ChatGPT, open Settings, then Connectors (called Apps & Connectors on some accounts).
Under Advanced settings, switch on Developer mode. That is what lets you add a connector by link.
Choose Create, give it a name, paste the link as the MCP server URL, and save. If it needs a sign-in, ChatGPT asks for it here.
Start a chat, open the tools menu, pick the connector, and ask. ChatGPT asks before it runs a tool the first time.
Custom connectors need a paid ChatGPT plan, and on Team, Enterprise and Edu accounts only an admin can add them. Our "Working" label means the server answered us; it cannot tell whether your plan lets you add it. All connectors that work in ChatGPT
In Claude, open Settings, then Connectors.
Choose Add custom connector, give it a name, and paste the link.
If it needs a sign-in, Claude sends you to it. Then turn the connector on in a chat from the tools menu and ask.
Custom connectors are available on paid Claude plans; on Team and Enterprise accounts an admin may need to add them. Our "Working" label means the server answered us; it cannot tell whether your plan lets you add it. All connectors that work in Claude
https://mcp.moltlinestudio.com/shippingResponse time at the last check: 186ms. Worked in 99.1% of checks over 30 days.
Screened, no issues found
Screening looks for known threats and hidden instructions at the time of the check, and runs again weekly and whenever the tool list changes. It cannot see the server's code, so only connect what you need and review what Muse asks to do. How screening works.
dim_weightWork out whether a parcel bills on its size or its weight. FREE. Carriers charge the greater of actual weight and dimensional weight, so a light bulky box costs more than the scale suggests. Typical input {"length": 18, "width": 12, "height": 10, "actual_weight": 6} returns {"cubparcel_fitPick the smallest box an item actually fits in, allowing for padding. FREE. Tries every rotation of the item against every box, so an item that only fits diagonally-oriented is still found. Typical input {"item_length": 10, "item_width": 6, "item_height": 4, "box_options": [[12, landed_costTotal what a unit really costs once freight, duty and fees are in. FREE. Duty is applied to goods value, tax to goods plus duty plus freight (the common import treatment), and the order is spelled out in the response so you can check it against your own broker's method. Typical ifreight_classDerive a US LTL freight class from density. FREE. Density in pounds per cubic foot maps to a class on the published NMFC density scale. Typical input {"length": 48, "width": 40, "height": 36, "weight": 400} returns {"cubic_feet": 40.0, "density_pcf": 10.0, "density_class": "100",rate_cardTurn a cost model into a customer-facing weight-banded price table. PREMIUM (license). Prices each band at its upper bound so you never under-charge inside a band, then rounds up to a tidy increment. Typical input {"base_cost": 4.2, "cost_per_lb": 0.65, "bands_lb": [1, 2, 5, 10],free_shipping_thresholdFind the order value at which free shipping stops costing you money. PREMIUM (license). Break-even is where the gross margin on the order covers the shipping you absorb. Typical input {"gross_margin_pct": 45, "ship_cost": 7.5, "current_aov": 38, "target_uplift_pct": 15} returns {https://mcp.moltlinestudio.com/shippingNot in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use Moltline Shipping Maths to help me. It is a free service with an MCP server at https://mcp.moltlinestudio.com/shipping. It does not need an API key. Ask me before you share anything with it." Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.
At the last check (November 13, 2026, 10:46 UTC) the endpoint was working, answering in 186ms. Over the last 7 days it answered 96.4% of health checks. It is checked every 15 minutes.
It was screened on September 24, 2026 with the result "screened, no issues found". Screening checks the domain against threat feeds and reads the tools for hidden instructions and requests for passwords or card numbers. It cannot see the server's code, so grant only the access you need.
It exposes 6 tools, including dim_weight, parcel_fit, landed_cost, freight_class. For example, you could ask Muse: "Tell me if this 18 by 12 by 10 inch box weighing 6 pounds will be billed on size or weight."
This listing was added from public sources (Found in the official MCP Registry (com.moltlinestudio/shipping)). If you build Moltline Shipping Maths, claim it to correct the details and get your badge.
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<a href="https://musedirectory.ai/connector/moltline-shipping-maths"><img src="https://musedirectory.ai/badge/moltline-shipping-maths.svg" alt="Moltline Shipping Maths on musedirectory.ai" width="236" height="40"></a>