Shipping Rates & Postage Calculator
Compare live USPS, UPS and FedEx shipping rates and calculate postage prices for letters and parcels.
Get real-time shipping rates from USPS, UPS and FedEx for packages from any US ZIP code to US or international destinations. Also calculates current USPS postage prices for letters, large envelopes and postcards. No API key required.
Try asking Muse: "What's the cheapest way to ship a 2-pound package from my ZIP code to California?"
Source: Found in the official MCP Registry (com.onlineshippingcalculator/shipping-rates) · First listed September 24, 2026
Last 24 hours
Each bar is one check, every 15 minutes. Green means it answered. Last checked 24 min ago.
Is it safe to connect?
What Muse can see: It does not ask you to sign in, so it cannot see your accounts. It only sees what Muse sends it from your request.
Before it acts: Read what Muse plans to do before you approve it, and remove the app from Muse when you stop using it.
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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://onlineshippingcalculator.com/api/mcpNot in Muse's Connectors list yet. Muse can still use it: its page gives you a request to paste into Muse.
Technical details: safety screening, tools, response time and recent checks
Response time at the last check: 225ms. Worked in 100% of checks over 30 days.
Screening · September 24, 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 · 2
get_shipping_ratesGet live USPS, UPS, and FedEx shipping rates for a package from a US ZIP code to a US or international destination. Returns carrier, service, price in USD, and estimated transit days, sorted cheapest first. IMPORTANT: these are discounted rates for postage purchased online througget_postage_priceGet the current USPS First-Class postage price for a letter, large envelope (flat), or postcard mailed within the US — including how many Forever stamps to put on it and an exact combination of stamp denominations that covers the postage with no waste. Prices are zone-independentRecent checks
Link
https://onlineshippingcalculator.com/api/mcpQuestions about Shipping Rates & Postage Calculator in Muse
How do I connect Shipping Rates & Postage Calculator to Muse?
Not in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use Shipping Rates & Postage Calculator to help me. It is a free service with an MCP server at https://onlineshippingcalculator.com/api/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 Shipping Rates & Postage Calculator working right now?
At the last check (September 28, 2026, 08:45 UTC) the endpoint was working, answering in 225ms. Over the last 7 days it answered 100% of health checks. It is checked every 15 minutes.
Is Shipping Rates & Postage Calculator safe to connect to Muse?
It was screened on September 24, 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 Shipping Rates & Postage Calculator do in Muse?
It exposes 2 tools, including get_shipping_rates, get_postage_price. For example, you could ask Muse: "What's the cheapest way to ship a 2-pound package from my ZIP code to California?"
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This listing was added from public sources (Found in the official MCP Registry (com.onlineshippingcalculator/shipping-rates)). If you build Shipping Rates & Postage Calculator, claim it to correct the details and get your badge.
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<a href="https://musedirectory.ai/connector/shipping-rates-postage-calculator"><img src="https://musedirectory.ai/badge/shipping-rates-postage-calculator.svg" alt="Shipping Rates & Postage Calculator on musedirectory.ai" width="236" height="40"></a>