Shipping Rates & Postage Calculator MCP Server

by onlineshippingcalculator Your server? Claim it

answering

Shipping Rates & Postage Calculator is answering right now. Last checked 7 min ago. It exposes 2 tools.

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

Uptime history 91 days of history · worst day 92%

91 days agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

223 ms

Response time

average over 24h

open, no key

Access

streamable-http

Nothing serious here today

Today is the operative word: we check Shipping Rates & Postage Calculator every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 7 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

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

Settings → Connectors → Add custom connector, then paste this address

https://onlineshippingcalculator.com/api/mcp

~/.codex/config.toml

[mcp_servers.shipping-rates]
url = "https://onlineshippingcalculator.com/api/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "shipping-rates": {
      "url": "https://onlineshippingcalculator.com/api/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "shipping-rates": {
      "type": "http",
      "url": "https://onlineshippingcalculator.com/api/mcp"
    }
  }
}

Available tools 2

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

postage

get_postage_price

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.

shipping

get_shipping_rates

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.

Endpoints

URL	Transport	State	Latency	Checked
https://onlineshippingcalculator.com/api/mcp	streamable-http	answering	142 ms	7 min ago

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Shipping Rates & Postage Calculator — questions

Answers built from our own checks of this server.

What can Shipping Rates & Postage Calculator do?

It exposes 2 tools, read directly from the server on our last check. Among them: get_postage_price, get_shipping_rates. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is Shipping Rates & Postage Calculator working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 223 ms. The bar chart above shows every period we have measured.

How do I connect Shipping Rates & Postage Calculator?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Shipping Rates & Postage Calculator need an API key?

No. Shipping Rates & Postage Calculator completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 2 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Shipping Rates & Postage Calculator?

It answers our handshake in 223 ms on average, which is faster than 63% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.