Blog
Technical guides for USPS API migration and shipping infrastructure.
EasyPost vs RevAddress: USPS Shipping API Pricing Compared
Factual pricing comparison between EasyPost and RevAddress for USPS shipping APIs. Per-label vs flat pricing math, feature comparison, and when each wins.
USPS Web Tools to v3 REST API: Complete Endpoint Mapping
Definitive endpoint mapping from every USPS Web Tools XML API to v3 REST equivalents. Addresses, tracking, labels, pricing, locations — every endpoint mapped.
USPS v3 API with Python: Complete Quickstart Guide
Install the usps-v3 Python SDK and start validating addresses, tracking packages, and comparing shipping rates in minutes.
USPS Web Tools to v3 REST: Complete Migration Guide
Step-by-step guide to migrating from USPS Web Tools XML API to the new v3 REST API. Endpoint mapping, OAuth setup, rate limit handling, and code samples.
USPS API Rate Limits: How to Handle 60 req/hr in Production
Practical strategies for handling USPS v3 API rate limits. Caching, batching, queue architecture, and BYOK for production workloads.