Usps Mcp

io.github.mrfentmenPublished by GitHub account mrfentmenv1.0.0Updated Oct 26, 2026

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

VerifiedSTDIODesktop onlyBusiness & Commerce

Server details

Identifier: io.github.mrfentmen/usps-mcp
Transport: STDIO
Runtime: Desktop only
Trust: Verified
Published: Oct 17, 2026

Security note

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Overview

AI-generated overview

Local MCP server that connects an assistant to the USPS API for shipping, package tracking, address validation and label creation.

What you can do: Track shipments and look up delivery status through the USPS API
Validate and standardize USPS addresses
Create shipping labels and handle shipping-related requests
Use a configurable USPS API base URL, defaulting to the official endpoint
When to use it: Useful when an assistant needs to check USPS package status, clean up or verify US addresses, or prepare shipping labels without leaving the chat.
Requirements: Runs as a local stdio process installed from the npm package usps-mcp, so Node.js is needed. Requires USPS API credentials: USPS_API_KEY, plus USPS_USERNAME and USPS_PASSWORD for basic auth. USPS_API_URL is optional and defaults to the official USPS API endpoint. Network access to USPS is required.

Before you install

The server needs USPS account credentials, including the secrets USPS_API_KEY and USPS_PASSWORD, which are passed as environment variables; keep them out of shared configs. Label creation and other shipping actions may incur real postage charges and create records with USPS, so review actions before they run. Address and shipment details are sent to the USPS API.

Installation

In SourceWeft

Open Usps Mcp in the dashboard and add it to a workspace.
Enable the server for the chats that should use its tools.

Desktop only via STDIO. STDIO servers start a local process, so they need the SourceWeft desktop host.

Other MCP clients

Follow the launch instructions in the repository.

README

This repository has no README.

Tools

SourceWeft has not started this package in its sandbox yet, so its tools are not known.

Version history

v1.0.0LatestOct 17, 2026

Score

25% of the applicable checks met

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Auth declared10 pts
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Tools listed15 pts
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DescriptionRequired15 pts
Logo10 pts
Documentation15 pts
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License10 pts
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