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Shipping Rates & Postage Calculator MCP Server

by onlineshippingcalculator Your server? Claim it
answering

Shipping Rates & Postage Calculator is answering right now. Last checked 15 min ago. It exposes 2 tools.

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

Uptime history 48 days of history
48 days agonow
100.0%
Uptime 24h
91 of 91 checks
2
Tools
read from the server
204 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.

Three servers free · no card

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 15 min ago.

run in your terminal
claude mcp add shipping-rates --transport http https://onlineshippingcalculator.com/api/mcp
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "shipping-rates": {
      "url": "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
{
  "mcpServers": {
    "shipping-rates": {
      "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

URLTransportStateLatencyChecked
https://onlineshippingcalculator.com/api/mcp streamable-http answering 138 ms 15 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 204 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 with the file path 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 204 ms on average, which is faster than 66% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.