Postage Stamp Price MCP Server

by theluckystrike Your server? Claim it

answering

Postage Stamp Price MCP is answering right now. Last checked 4 min ago. It exposes 3 tools. Last commit 5 Nov 2026.

How much is a stamp: USPS Forever stamp, postcard, international and letter postage by weight.

Uptime history 4 days of history

4 days agonow

100.0%

Uptime 24h

92 of 92 checks

Tools

read from the server

224 ms

Response time

average over 24h

Stars

last commit 5 Nov 2026

Nothing serious here today

Today is the operative word: we check Postage Stamp Price MCP 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 4 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add postage-stamp-price-mcp --transport http https://postage-stamp-price-mcp.lipmichal.workers.dev/mcp

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

https://postage-stamp-price-mcp.lipmichal.workers.dev/mcp

~/.codex/config.toml

[mcp_servers.postage-stamp-price-mcp]
url = "https://postage-stamp-price-mcp.lipmichal.workers.dev/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "postage-stamp-price-mcp": {
      "url": "https://postage-stamp-price-mcp.lipmichal.workers.dev/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "postage-stamp-price-mcp": {
      "type": "http",
      "url": "https://postage-stamp-price-mcp.lipmichal.workers.dev/mcp"
    }
  }
}

Available tools 3

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

calculate

calculate_letter_postage

Retail postage for one letter, postcard or large envelope (flat) by weight, to the US, Canada, Mexico or any other country, with the nonmachinable surcharge for square or rigid cards, the total for a quantity, and the number of Forever stamps per piece. Letters up to 3.5 oz, US large envelopes up to 13 oz.

flat

get_flat_rate_prices

Current USPS retail prices for Priority Mail Flat Rate envelopes and Small, Medium, Large and APO/FPO/DPO Flat Rate Boxes, and Priority Mail Express Flat Rate envelopes, from Notice 123.

stamp

get_stamp_price

The current USPS Forever stamp price (First-Class Mail 1 oz stamped letter), the 2, 3 and 3.5 oz prices, metered letter prices, postcard, 1 oz large envelope, the nonmachinable surcharge and the 1 oz international letter (Global Forever) price, read at call time from USPS Notice 123 with its effective date.

Endpoints

URL	Transport	State	Latency	Checked
https://postage-stamp-price-mcp.lipmichal.workers.dev/mcp	streamable-http	answering	261 ms	4 min ago

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Postage Stamp Price MCP — questions

Answers built from our own checks of this server.

What can Postage Stamp Price MCP do?

It exposes 3 tools, read directly from the server on our last check. Among them: calculate_letter_postage, get_flat_rate_prices, get_stamp_price. 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 Postage Stamp Price MCP working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 92 of 92 checks got a reply (100.0%), average response time 224 ms. The bar chart above shows every period we have measured.

How do I connect Postage Stamp Price MCP?

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 Postage Stamp Price MCP need an API key?

No. Postage Stamp Price MCP completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 3 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Postage Stamp Price MCP?

It answers our handshake in 224 ms on average, which is faster than 61% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.

Is Postage Stamp Price MCP open source?

The code is open source: it is published under the MIT licence, written in TypeScript and 0 stars on GitHub. The licence covers the code in the repository, not the hosted service at postage-stamp-price-mcp.lipmichal.workers.dev, which runs on its operator's own terms.