USPS Holiday Shipping Deadlines MCP

USPS holiday shipping deadlines for AI assistants. Ask "is it too late to ship for Christmas?" and get the USPS recommended send-by date for each mail class, the days left from today, and which service still makes December 25.

This is a Model Context Protocol (MCP) server. It reads the USPS holiday shipping dates page at call time. It needs no API key. If usps.com cannot be read, it answers from a built-in copy of the 2026 table and says so in data_source and live_check.

Tools

Every result has structured JSON, a one-paragraph summary, as_of, source and more (a page on mcpstamp.com).

What it knows that your model does not

• This year's dates. USPS publishes new send-by dates every fall, so a model's remembered dates are last year's.
• Today's date in US Eastern time, so "how many days do I have" is exact.
• The fine print. Ground Advantage to Alaska and Hawaii has no single date (USPS gives a 10-day or more service expectation), and Priority Mail Express Military is not offered to APO ZIP 093.

Install

Hosted (Claude.ai custom connector, ChatGPT developer mode)

Paste this URL. No token, no sign-up. It works now.

https://usps-holiday-shipping-deadlines-mcp.lipmichal.workers.dev/mcp

Claude Code

claude mcp add --transport http usps-holiday-deadlines https://usps-holiday-shipping-deadlines-mcp.lipmichal.workers.dev/mcp

Claude Desktop

Claude Desktop adds remote servers under Settings, Connectors, Add custom connector. Paste the URL above.

Cursor

Add to ~/.cursor/mcp.json:

{
  "mcpServers": {
    "usps-holiday-deadlines": { "url": "https://usps-holiday-shipping-deadlines-mcp.lipmichal.workers.dev/mcp" }
  }
}

VS Code

Add to .vscode/mcp.json:

{
  "servers": {
    "usps-holiday-deadlines": { "type": "http", "url": "https://usps-holiday-shipping-deadlines-mcp.lipmichal.workers.dev/mcp" }
  }
}

Local stdio (after npm release)

The npm package is not published yet. After it is, run it locally with Node 20 or newer:

claude mcp add usps-holiday-deadlines -- npx -y usps-holiday-shipping-deadlines-mcp

Example prompts

• "Is it too late to ship a package for Christmas?"
• "What is the last day to mail Christmas cards with USPS this year?"
• "I'm mailing a gift to Germany on December 10. Which USPS service still gets there by Christmas?"
• "When do I need to ship to APO 09021 for Christmas?"
• "What are the USPS holiday shipping deadlines for Hawaii?"

Data sources

Full list with fetch dates in DATA_SOURCES.md.

• USPS 2026 Holiday Shipping Deadlines, read at call time.
• USPS service commitments for ZIP-to-ZIP estimates (linked, not read).

Limitations

• USPS dates are recommendations for expected delivery, not guarantees.
• USPS only. UPS and FedEx publish their own holiday dates; their pages block automated reads, so they are not included.
• Country to region mapping covers about 120 common countries. Others can be given as a USPS region name ("Europe", "Middle East").
• The hosted server caches the USPS page for up to 6 hours.

More

More MCP servers that answer questions your assistant cannot answer alone are on mcpstamp.com.

Part of the Zovo MCP collection: https://mcp.zovo.one

Built by theluckystrike.

Development

npm install
npm test                              # builds, then runs the fixture tests and an offline stdio test
node scripts/stdio-transcript.mjs     # live stdio round trip, writes .live/stdio-transcript.jsonl

License

MIT