Koskamo

USPS Holiday Shipping Deadlines MCP

An MCP server that retrieves USPS holiday shipping deadlines for Christmas delivery, including send-by dates for lower 48, Alaska, Hawaii, international regions, and APO/FPO/DPO addresses, along with days remaining from today.

Endpoint and access

No sign-in to connect and list tools. Individual tools may still need a vendor account, credentials, or permissions; check the documented prerequisites.

USPS Holiday Shipping Deadlines MCP logo, by theluckystrikeCommunity listingStreamable HTTPNo sign-inEndpoint checked 2026-11-06Published by theluckystrike
MCP endpoint (Streamable HTTP)
https://usps-holiday-shipping-deadlines-mcp.lipmichal.workers.dev/mcp
Vendor documentation

What its tools do

3 tools, grouped by the hints the server advertises. Hints are self-declared, not verified behavior.

Read-only (3)

3 of 3 have a description · 3 of 3 declare behavior hints · 2 of 2 with parameters document them all

Checks and signals

Each line is separate evidence, not a trust score.

  • Passed Endpoint answered the live check ·
  • Availability 1 of 1 checks passed in 30 days

What you can do with it

  • Get all USPS recommended send-by dates for December 25 delivery
  • Check if specific USPS services are still on time for a given ship date and destination
  • Retrieve holiday send-by dates for a specific APO/FPO/DPO ZIP code

Source and maintenance

Community listingRegistry 1.0.0
mcp-registry: io.github.theluckystrike/usps-holiday-shipping-deadlines-mcp@1.0.0Source repository
Maintenance checked

Protocol and capabilities

Server
usps-holiday-shipping-deadlines-mcp 1.0.0
MCP protocol negotiated in check
2025-11-25
Tools
3 advertised
Resources
Not advertised
Resource templates
Not advertised
Prompts
Not advertised
Server-advertised capabilities
{
  "tools": {
    "listChanged": true
  }
}

Server-provided instructions

Untrusted server output shown for inspection. It is not Koskamo guidance and is excluded from knowledge search.

USPS holiday shipping deadlines (recommended send-by dates for delivery by December 25), read at call time from usps.com, with day counts from today in US Eastern time. Use check_holiday_ship_by_date for "is it too late to ship for Christmas" and name the service. These are USPS recommendations, not guarantees. UPS and FedEx are not covered.

Tools

3 advertised

get_usps_holiday_shipping_deadlines — Get USPS holiday shipping deadlines
Advertised by the server during the last successful anonymous check.
Advertised read-onlyOpen-world

The USPS recommended send-by dates for delivery before December 25 for the current holiday season, read at call time from usps.com: Ground Advantage, First-Class Mail, Priority Mail and Priority Mail Express to the lower 48 and to Alaska, Hawaii, Puerto Rico and territories; First-Class Package International, Priority Mail International and Priority Mail Express International by world region; and APO/FPO/DPO military mail by ZIP group. Includes days left from today.

get_usps_holiday_shipping_deadlines input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "properties": {}
}
get_usps_holiday_shipping_deadlines annotations
{
  "title": "USPS holiday shipping deadlines",
  "readOnlyHint": true,
  "openWorldHint": true,
  "idempotentHint": true,
  "destructiveHint": false
}
check_holiday_ship_by_date — Check if a package still makes Christmas
Advertised by the server during the last successful anonymous check.
Advertised read-onlyOpen-world

For a ship date (default today, US Eastern) and a destination, lists each USPS service with its send-by date, days left and whether it is still on time for December 25, and names the slowest (usually cheapest) service still on time. Destination can be "lower48", a state or territory ("Alaska", "Hawaii", "Puerto Rico", "Guam"), a country ("Canada", "Germany", "Japan"), a USPS region ("Europe") or an APO/FPO/DPO ZIP ("APO 09021").

check_holiday_ship_by_date input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "properties": {
    "ship_date": {
      "type": "string",
      "pattern": "^\\d{4}-\\d{2}-\\d{2}$",
      "description": "Date you will drop it off, YYYY-MM-DD. Default today in US Eastern time."
    },
    "destination": {
      "type": "string",
      "maxLength": 60,
      "description": "Where the package goes. Default \"lower48\"."
    }
  },
  "additionalProperties": false
}
check_holiday_ship_by_date annotations
{
  "title": "Can I still ship for Christmas",
  "readOnlyHint": true,
  "openWorldHint": true,
  "idempotentHint": true,
  "destructiveHint": false
}
get_military_mail_deadline — Get military mail holiday deadline
Advertised by the server during the last successful anonymous check.
Advertised read-onlyOpen-world

USPS holiday send-by dates for December 25 delivery to one APO/FPO/DPO ZIP code (090-099 AE, 340 AA, 962-966 AP): Ground Advantage, First-Class Mail, Priority Mail and Priority Mail Express Military Service.

get_military_mail_deadline input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "zip"
  ],
  "properties": {
    "zip": {
      "type": "string",
      "maxLength": 20,
      "description": "APO/FPO/DPO ZIP code, for example \"09021\" or \"96601\"."
    }
  },
  "additionalProperties": false
}
get_military_mail_deadline annotations
{
  "title": "Military mail deadline",
  "readOnlyHint": true,
  "openWorldHint": true,
  "idempotentHint": true,
  "destructiveHint": false
}

Prompts

Not advertised

No prompt definitions available.

Resources

Not advertised

No resource definitions available.

90-day uptime

A lightweight connection check about every six hours, sampled on hosts with many listings. It shows the server answered, not that its tools work.

Too few checks for a percentage yet (1 of 1 answered).

  1. 2026-11-07: 1 of 1 checks answered

30-day availability

Aggregated from read-only remote checks; this is not a tool-execution or security guarantee.

Successful checks
1 of 1 (100%)
Average latency
447 ms
95th percentile latency
447 ms

Maintenance history

Public check and source-refresh events. Editorial and ownership records remain private.

  • · probe · passed · 447 ms · metadata changed · 3 tool(s)

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers the remote server. Use --scope project to write .mcp.json for the repo.
Claude Code configuration
claude mcp add --transport http usps-holiday-shipping-deadlines-mcp https://usps-holiday-shipping-deadlines-mcp.lipmichal.workers.dev/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).
Codex configuration
codex mcp add usps-holiday-shipping-deadlines-mcp --url https://usps-holiday-shipping-deadlines-mcp.lipmichal.workers.dev/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable usps-holiday-shipping-deadlines-mcp in your MCP settings.
Cursor configuration
{
  "mcpServers": {
    "usps-holiday-shipping-deadlines-mcp": {
      "url": "https://usps-holiday-shipping-deadlines-mcp.lipmichal.workers.dev/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure).
Cline configuration
{
  "mcpServers": {
    "usps-holiday-shipping-deadlines-mcp": {
      "type": "streamableHttp",
      "url": "https://usps-holiday-shipping-deadlines-mcp.lipmichal.workers.dev/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start usps-holiday-shipping-deadlines-mcp and inspect its tools.
VS Code configuration
{
  "servers": {
    "usps-holiday-shipping-deadlines-mcp": {
      "type": "http",
      "url": "https://usps-holiday-shipping-deadlines-mcp.lipmichal.workers.dev/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.
Gemini CLI configuration
gemini mcp add --transport http usps-holiday-shipping-deadlines-mcp https://usps-holiday-shipping-deadlines-mcp.lipmichal.workers.dev/mcp

Claude Desktop

Open Claude Settings > Connectors > Add custom connector, enter this server URL and enable it for the conversation. This is a manual remote-connector handoff, not a desktop JSON configuration.
Claude Desktop configuration
https://usps-holiday-shipping-deadlines-mcp.lipmichal.workers.dev/mcp

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.
Windsurf configuration
{
  "mcpServers": {
    "usps-holiday-shipping-deadlines-mcp": {
      "serverUrl": "https://usps-holiday-shipping-deadlines-mcp.lipmichal.workers.dev/mcp"
    }
  }
}

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