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mcp/harbor
Verified official

Shipping Rates & Postage Calculator MCP

v1.0.0

com.onlineshippingcalculator/shipping-rates

Live USPS, UPS & FedEx shipping rates plus USPS postage and stamp prices. Free, no API key.

transport:streamable-http
Website

Target client

run in your project directory 

claude mcp add --transport http shipping-rates https://onlineshippingcalculator.com/api/mcp

Adds it for this project only. Append --scope user to make it available everywhere. Claude Code docs

This listing does not declare its tools. Connect the server and your client will discover them on the handshake.