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mcp/harbor
Claude Code

usps mcp for Claude Code

io.github.mrfentmen/usps-mcp

USPS shipping, tracking, address validation, and label creation.

client:Claude Code transport:stdio runtime:npm

Install usps mcp in Claude Code

run in your project directory

Held in this page only — never stored, logged, or sent anywhere but back to your screen. 

claude mcp add usps-mcp -e USPS_API_KEY=<USPS_API_KEY> -e USPS_USERNAME=<USPS_USERNAME> -e USPS_PASSWORD=<USPS_PASSWORD> -e USPS_API_URL=<USPS_API_URL> -- npx -y usps-mcp

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

usps mcp in other clients

usps mcp MCP server