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Can Claude check USPS holiday shipping deadlines?

Yes with web search, with one caution. USPS posts new send-by dates every fall, so from training data alone Claude may give last year's dates. With web search on, Claude can find the USPS page, but you still have to check that it read the 2026 table and the right row for your destination. Connect the free USPS Holiday Shipping Deadlines server and Claude reads the USPS holiday shipping dates page when you ask. It gives the send-by date for each mail class to the lower 48, Alaska, Hawaii, other countries and APO/FPO/DPO ZIP codes, counts the days left in US Eastern time and names the slowest service that still makes December 25. These are USPS recommendations, not guarantees. UPS and FedEx are not covered.

Connect free, no token USPS holiday shipping deadlines MCP server

What Claude does alone, and what needs the server

Claude on its own

  • Explains the USPS mail classes and how long each one usually takes.
  • Finds the USPS holiday dates page when web search is on.

With the USPS Holiday Shipping Deadlines server

  • This year's USPS send-by date for each mail class, read from usps.com at call time.
  • The days left from today in US Eastern time for your destination.
  • The slowest service that still arrives by December 25, including APO/FPO/DPO mail.

A real call to the live server

We sent this to the hosted server on 2026-11-05. The answer below is the server's own text, not a mock-up. Live values will differ when you ask.

You ask

When is the last day to ship with USPS for Christmas?

Tool call

get_usps_holiday_shipping_deadlines {}

Server answer

USPS 2026 recommended send-by dates for delivery by December 25 in the lower 48 states: USPS Ground Advantage Thursday, December 17, First-Class Mail Thursday, December 17, Priority Mail Friday, December 18, Priority Mail Express Saturday, December 19. International mail is Wednesday, December 9 for First-Class Package International and Priority Mail International. Today (2026-11-05, Eastern) there are 42 days left for USPS Ground Advantage. These are USPS recommendations, not guarantees.

Run on 2026-11-05 in US Eastern time. The days left change every day, and the server counts them again each time you ask.

You ask

If I mail a gift to Germany on December 10, will it arrive by Christmas?

Tool call

check_holiday_ship_by_date {"destination":"Germany","ship_date":"2026-12-10"}

Server answer

Shipping on Thursday, December 10 to Germany (USPS region Europe), Priority Mail Express International is still within the USPS recommended send-by date for December 25. The slowest service still on time is Priority Mail Express International (send by Wednesday, December 16, 6 days left). USPS 2026 recommendations, not guarantees.

Connect it in 1 minute

One URL, no token, no account. In Claude.ai or Claude Desktop open Settings, then Connectors, then Add custom connector, and paste the URL.

Connector URL

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

Claude Code

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

Cursor (~/.cursor/mcp.json)

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

VS Code (.vscode/mcp.json)

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

All 3 tools, sources and more prompts are on the USPS holiday shipping deadlines MCP server page.

Questions

Can Claude check USPS holiday shipping deadlines?
Yes with web search, with one caution. USPS posts new send-by dates every fall, so from training data alone Claude may give last year's dates. With web search on, Claude can find the USPS page, but you still have to check that it read the 2026 table and the right row for your destination. Connect the free USPS Holiday Shipping Deadlines server and Claude reads the USPS holiday shipping dates page when you ask. It gives the send-by date for each mail class to the lower 48, Alaska, Hawaii, other countries and APO/FPO/DPO ZIP codes, counts the days left in US Eastern time and names the slowest service that still makes December 25. These are USPS recommendations, not guarantees. UPS and FedEx are not covered.
Is the send-by date a guarantee?
No. USPS calls these dates recommendations. Weather, volume and customs can delay a package. Ship a few days early when you can.
Does it cover UPS and FedEx?
No. It covers USPS only. UPS and FedEx publish their own holiday dates on their sites.
Is the server free?
Yes. The USPS Holiday Shipping Deadlines server is free at its hosted URL with no token, key or account. The source is open on GitHub.

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