USPS Holiday Shipping Deadlines
Check USPS holiday send-by dates so gifts arrive before December 25.
Reads current USPS holiday shipping deadlines from usps.com. Muse can check send-by dates for Ground Advantage, First-Class, Priority Mail and international services, see days left, and name the cheapest service still on time for a destination, country or APO/FPO ZIP.
Try asking Muse: "If I ship a Priority Mail box to Alaska on the 18th, will it get there before December 25?"
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Source: Found in the official MCP Registry (io.github.theluckystrike/usps-holiday-shipping-deadlines-mcp) · First listed November 5, 2026
Last 24 hours
Each bar is one check, every 15 minutes. Green means it answered. Last checked 2 h ago.
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How to add it to Muse
Not in Muse's Connectors list yet, but Muse can still use it. Copy the request below and paste it into Muse. Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.
https://usps-holiday-shipping-deadlines-mcp.lipmichal.workers.dev/mcpNot in Muse's Connectors list yet. Muse can still use it: its page gives you a request to paste into Muse.
Also use it in ChatGPT or Claude
USPS Holiday Shipping Deadlines is a remote MCP server, so any assistant that can add a custom connector by link can use it. Same link, same tools.
Add it to ChatGPT
- 1
Open ChatGPT settings
In ChatGPT, open Settings, then Connectors (called Apps & Connectors on some accounts).
- 2
Turn on developer mode
Under Advanced settings, switch on Developer mode. That is what lets you add a connector by link.
- 3
Create the connector
Choose Create, give it a name, paste the link as the MCP server URL, and save. If it needs a sign-in, ChatGPT asks for it here.
- 4
Use it in a chat
Start a chat, open the tools menu, pick the connector, and ask. ChatGPT asks before it runs a tool the first time.
Custom connectors need a paid ChatGPT plan, and on Team, Enterprise and Edu accounts only an admin can add them. Our "Working" label means the server answered us; it cannot tell whether your plan lets you add it. All connectors that work in ChatGPT
Add it to Claude
- 1
Open Claude settings
In Claude, open Settings, then Connectors.
- 2
Add a custom connector
Choose Add custom connector, give it a name, and paste the link.
- 3
Connect and use it
If it needs a sign-in, Claude sends you to it. Then turn the connector on in a chat from the tools menu and ask.
Custom connectors are available on paid Claude plans; on Team and Enterprise accounts an admin may need to add them. Our "Working" label means the server answered us; it cannot tell whether your plan lets you add it. All connectors that work in Claude
https://usps-holiday-shipping-deadlines-mcp.lipmichal.workers.dev/mcpWhat people ask Muse to do
Technical details: safety screening, tools, response time and recent checks
Response time at the last check: 171ms. Worked in 100% of checks over 30 days.
Screening · November 5, 2026
Screened, no issues found
Screening looks for known threats and hidden instructions at the time of the check, and runs again weekly and whenever the tool list changes. It cannot see the server's code, so only connect what you need and review what Muse asks to do. How screening works.
Tools · 3
get_usps_holiday_shipping_deadlinesThe 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; Firscheck_holiday_ship_by_dateFor 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 territget_military_mail_deadlineUSPS 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.Recent checks
Link
https://usps-holiday-shipping-deadlines-mcp.lipmichal.workers.dev/mcpQuestions about USPS Holiday Shipping Deadlines in Muse
How do I connect USPS Holiday Shipping Deadlines to Muse?
Not in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use USPS Holiday Shipping Deadlines to help me. It is a free service with an MCP server at https://usps-holiday-shipping-deadlines-mcp.lipmichal.workers.dev/mcp. It does not need an API key. Ask me before you share anything with it." Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.
Is USPS Holiday Shipping Deadlines working right now?
At the last check (November 7, 2026, 02:30 UTC) the endpoint was working, answering in 171ms. Over the last 7 days it answered 100% of health checks. It is checked every 15 minutes.
Is USPS Holiday Shipping Deadlines safe to connect to Muse?
It was screened on November 5, 2026 with the result "screened, no issues found". Screening checks the domain against threat feeds and reads the tools for hidden instructions and requests for passwords or card numbers. It cannot see the server's code, so grant only the access you need.
What can USPS Holiday Shipping Deadlines do in Muse?
It exposes 3 tools, including get_usps_holiday_shipping_deadlines, check_holiday_ship_by_date, get_military_mail_deadline. For example, you could ask Muse: "If I ship a Priority Mail box to Alaska on the 18th, will it get there before December 25?"
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