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Shipping Rates & Postage Calculator

by onlineshippingcalculator.com · remote · no sign-in to list tools · v1.0.0 · published by com.onlineshippingcalculator

Live USPS, UPS & FedEx shipping rates plus USPS postage and stamp prices. Free, no API key.

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2 tools: 2 only read.

Scanned Oct 21, 2026

No check matched anything in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http shipping-rates https://onlineshippingcalculator.com/api/mcp

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

2 tools

Only reads 2Claude Code: allow
  • get_postage_priceGet the current USPS First-Class postage price for a letter, large envelope (flat), or postcard mailed within the US — including how many Forever stamps to put on it and an exact c…No findings

    Why it is in this group

    • The name "get_postage_price" says "get": a word for reading.
    Description, as the server wrote it
    Get the current USPS First-Class postage price for a letter, large envelope (flat), or postcard mailed within the US — including how many Forever stamps to put on it and an exact combination of stamp denominations that covers the postage with no waste. Prices are zone-independent (same anywhere in the US). For boxes and parcels use get_shipping_rates instead.

    Annotations the server declares

    • readOnlyHint: true
  • get_shipping_ratesGet live USPS, UPS, and FedEx shipping rates for a package from a US ZIP code to a US or international destination.No findings

    Why it is in this group

    • The name "get_shipping_rates" says "get": a word for reading.
    Description, as the server wrote it
    Get live USPS, UPS, and FedEx shipping rates for a package from a US ZIP code to a US or international destination. Returns carrier, service, price in USD, and estimated transit days, sorted cheapest first. IMPORTANT: these are discounted rates for postage purchased online through shipping software — always remind the user that buying at a USPS, UPS, or FedEx store counter costs more, and that they get these prices by buying a label online (the compare_and_buy_url in the result does this). Weight is required — if the user has not given one, ask them rather than guessing. Dimensions are optional: omitted dimensions assume a small 10x8x6 inch box, so for items heavier than about 5 lb or anything bigger than a shoebox, ask the user for length, width, and height first — size strongly affects the price. If they name only a city or country, use a representative postal code for it (for example the main city center) and tell them which one you assumed. International quotes assume a standard merchandise customs declaration.

    Annotations the server declares

    • readOnlyHint: true

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Install

Pinned to version 1.0.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http shipping-rates https://onlineshippingcalculator.com/api/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__shipping-rates__get_shipping_rates",
      "mcp__shipping-rates__get_postage_price"
    ],
    "ask": [],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as shipping-rates. Review it before you use it.