Why API Testing Is Not Optional (And What You Should Be Doing About It) Modern applications depend on APIs to connect services, deliver data, and power user experiences—but with that central role comes risk. Even small issues in an API can cascade into major failures across entire systems. This article explores why API testing is essential for maintaining reliability and performance, breaks down the key types of testing every developer should understand, so developers can build, validate, and scale APIs with confidence. May 1, 2026 By Ricardo Rangel Developer Solutions Testing Loading Disqus... Read More »
New Distance Between ZIP Code and Coordinates Endpoint We’re excited to announce a powerful new addition to the Zip Code API v2: the Distance Between ZIP Code and Latitude/Longitude Coordinates endpoint. This new capability expands the API’s geospatial intelligence by enabling developers to calculate distances not just between ZIP codes—but between a ZIP code and any geographic point on Earth. April 13, 2026 By Ricardo Rangel Product Notifications Geospatial, Zip Code API Loading Disqus... Read More »
Famous ZIP Codes in the United States: What a ZIP Code Is and Why It Exists Learn what a ZIP Code is, why ZIP Codes were created, and discover the most famous ZIP Code in every U.S. state—from Beverly Hills 90210 to Manhattan 10001. February 20, 2026 By Ricardo Rangel About the Data Famous ZIP Codes, What is a ZIP Code, Zip Code API Loading Disqus... Read More »
Mapping IRS 1040 Tax Data with the Zip Code API: A Complete Guide Understanding how income and demographic data align across geographic regions is key to building smarter insights — and that’s exactly what the Zip Code API delivers. In this guide, we explain how the API connects directly to publicly available IRS 1040 tax return data, providing a clear mapping between individual return fields and zip code–level metrics October 21, 2025 By Ricardo Rangel Tutorials 1040, IRS Statistics, Zip Code API Loading Disqus... Read More »
Unlocking Local Insights: Income by Zip Code This blog article explores the value of analyzing income by ZIP code for marketers, real estate professionals, and analysts. It outlines how localized income data can drive smarter decisions in targeting, expansion, and performance benchmarking. The post also features a sample Python script that takes a ZIP code, radius, and income threshold as inputs, then identifies nearby ZIP codes with higher-than-threshold average incomes using IRS data. Practical use cases and ideas for extending the script are included to help teams turn raw data into strategic insights. June 12, 2025 By Ricardo Rangel Tutorials Income by Zip Code, Python, Use Case, Zip Code API Loading Disqus... Read More »