Moltline Shipping Maths MCP server

• dim_weightFree

  Work 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 {"cubic": 2160.0, "dim_weight": 15.54, "actual_weight": 6.0, "billable_weight": 15.54, "billed_on": "dimensional", "overage": 9.54, "divisor_used": 139.0, "note": "..."}. Use when deciding whether a smaller box is worth the packing effort, or why an invoice exceeded the scale weight. Not for choosing a box from a list of candidates — that is parcel_fit. Errors: on invalid, missing, or malformed input this tool never raises a protocol error — it returns {"error": "<what is wrong and how to fix it>"} (for example {"error": "custom_divisor must be greater than 0 when divisor is 'custom'"}). Every call is read-only and idempotent, so after correcting the input it is always safe to retry.

• free_shipping_thresholdFree

  Find 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 {"break_even": 16.67, "suggested_threshold": 43.7, "above_current_aov_by": 5.7, "rationale": "..."}. Use when setting or defending a free-shipping bar. Not for what shipping should cost when it is not free — that is rate_card. Errors: on invalid, missing, or malformed input this tool never raises a protocol error — it returns {"error": "<what is wrong and how to fix it>"}. Every call is read-only and idempotent, so after correcting the input it is always safe to retry.

• freight_classFree

  Derive 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", "caveat": "..."}. Use for a first estimate before a carrier quote. Not as a final classification: NMFC also weighs stowability, handling and liability, so a carrier can and does reclassify. Errors: on invalid, missing, or malformed input this tool never raises a protocol error — it returns {"error": "<what is wrong and how to fix it>"} (for example {"error": "dimensions produce zero volume"}). Every call is read-only and idempotent, so after correcting the input it is always safe to retry.

• landed_costFree

  Total 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 input {"unit_cost": 8.5, "quantity": 200, "freight_total": 640, "duty_pct": 6.5, "tax_pct": 0} returns {"goods": 1700.0, "duty": 110.5, "freight": 640.0, "tax": 0.0, "total_landed": 2450.5, "landed_unit_cost": 12.25, ...}. Use before setting a price on imported stock. Not for the margin that price leaves you — that is the dropship server's margin_check. Errors: on invalid, missing, or malformed input this tool never raises a protocol error — it returns {"error": "<what is wrong and how to fix it>"}. Every call is read-only and idempotent, so after correcting the input it is always safe to retry.

• parcel_fitFree

  Pick 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, 9, 4], [14, 10, 6]]} returns {"fits": [{"box": [14, 10, 6], "cubic": 840.0, "slack": [2, 2, 0]}], "best": [14, 10, 6], "rejected": [...]}. Use when choosing packaging from stock. Not for what the carrier will bill once a box is chosen — that is dim_weight. Errors: on invalid, missing, or malformed input this tool never raises a protocol error — it returns {"error": "<what is wrong and how to fix it>"} (for example {"error": "box_options must contain at least one [l, w, h] box"}). Every call is read-only and idempotent, so after correcting the input it is always safe to retry.

• rate_cardFree

  Turn 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], "margin_pct": 25} returns {"bands": [{"up_to_lb": 1, "cost": 4.85, "price": 6.5}, ...], "over_top_band": "quote individually"}. Use when publishing shipping prices customers pay. Not for the cut-off at which shipping becomes free — that is free_shipping_threshold. Errors: on invalid, missing, or malformed input this tool never raises a protocol error — it returns {"error": "<what is wrong and how to fix it>"} (for example {"error": "bands_lb must contain at least one upper bound"}). Every call is read-only and idempotent, so after correcting the input it is always safe to retry.

• –Code scanremote-only server, no package to scann/a
• Live reliabilityremote reachable in 409ms20/20
• Tool poisoning6 tool descriptions checked15/15
• Auth qualityopen endpoint, read-only tools10/15
• Maintenancelast push 0 days ago15/15
• Maintainer identitynamespace and repository owner differ; website matches verified namespace5/10

Moltline Shipping Maths: common questions

Is Moltline Shipping Maths MCP server safe?

Yes, by our scan: it is graded A (87/100). Read the Moltline Shipping Maths safety report

How do I install Moltline Shipping Maths?

It runs remotely at mcp.moltlinestudio.com. Add it to Claude Code, Claude Desktop or Cursor with the snippets above, or call it through the mcp.market gateway without installing anything.

Does Moltline Shipping Maths need an API key?

Not as far as the registry entry and our scan can tell: no credentials are declared or required.

Is Moltline Shipping Maths maintained?

The last commit was in the last day (2026-09-19). The latest release is v1.2.0.

Is Moltline Shipping Maths up?

100% of our last 2 checks got an answer. We check remote servers about four times a day.