Node.JS library to comply with USPS Publication 28 address guidelines.
Detect and validate tracking numbers for USPS, UPS, FedEx, and other major couriers.
Lightweight mapping of USPS ZIP Codes to their assigned region.
A package that converts U.S. state abbreviations to full names and back
Api wrapper for the USPS Web-Tools
USPS shared React components library
Simple encoder and decoder for the United States Postal Service (USPS) Intelligent Mail Barcode (IMB) service.
Utils library to use with the Smarty Javascript SDK
A library to normalize and convert any variations of US state names and abbreviations.
USPS API client for tracking packages using OAuth 2.0 authentication
Regex to guess a shipping carrier.
A list of US ZIP codes and their geolocations
SVG icons of the states of USA for React
Shared eslint configuration
US Street Address Parser
Node.js Streams, a user-land copy of the stream library from Node.js
USPS v3 REST API client — OAuth 2.0, address validation, tracking, labels, rates. Drop-in replacement for usps-webtools (retired Jan 2026).
Determine if the current node version supports the `--preserve-symlinks` flag.
A light-weight module that brings Fetch API to node.js
USPS Abbreviations
Node.js SDK for USPS Web Tools APIs
A utility that normalizes an address string for ease of parsing
Node.js API (Node-API)
US State names and abbreviations / postal codes according to USPS