# Shipping Rates & Postage Calculator Muse connector

From musedirectory.ai, the independent directory of Meta Muse connectors. Not affiliated with Meta.

## Shipping Rates & Postage Calculator

Compare live USPS, UPS and FedEx shipping rates and calculate postage prices for letters and parcels.

- Record: https://musedirectory.ai/connector/shipping-rates-postage-calculator
- Category: Shopping & Commerce
- Developer: onlineshippingcalculator.com (https://onlineshippingcalculator.com/mcp)
- Muse status: Extra setup. Not in Muse's Connectors list yet. Muse can still use it: its page gives you a request to paste into Muse.
- Health: Working, 225ms, checked 2026-09-28T08:45:51Z
- Endpoint: https://onlineshippingcalculator.com/api/mcp
- Auth: No account needed; Pricing: unknown
- Screening: Screened, no issues found (2026-09-24T17:26:05Z)
- Source: Found in the official MCP Registry (com.onlineshippingcalculator/shipping-rates) https://registry.modelcontextprotocol.io/v0/servers?search=com.onlineshippingcalculator%2Fshipping-rates

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.

Example request: "What's the cheapest way to ship a 2-pound package from my ZIP code to California?"

How to connect: 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.

Tools:
- get_shipping_rates: Get 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 throug
- get_postage_price: Get 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-independent

Screening checks:
- MCP handshake: pass (Answered in 254ms)
- Domain against threat feeds (Cloudflare security DNS): pass (onlineshippingcalculator.com not flagged)
- Published packages against the OSV malicious-package database: n/a (No npm or PyPI package published)
- Hidden instructions or invisible characters in tool text: pass (2 tools read, nothing found)
- Inputs asking for passwords, card numbers or seed phrases: pass (None found)
- Domain and redirects: pass (Domain registered 3552 days ago)
- AI review of purpose and tool behavior: pass (No concerns)