The American Petroleum Institute (API) is the only national trade association that represents all aspects of America’s oil and natural gas industry. Our more than 600 corporate members, …

At American Proficiency Institute every aspect of your proficiency testing is controlled by you -- how you choose to receive your test kits, how you report results, and whether to review test …

An API is often made up of different parts which act as tools or services that are available to the programmer. A program or a programmer that uses one of these parts is said to call that …

Our Clinical Proficiency Testing Programs. We offer comprehensive programs that cover the clinical laboratory. You need a provider that fully supports you with technical expertise and …

This fall at API, we’re offering a full lineup of clinics designed to help athletes build skills, gain confidence, and prepare for their season. From Baseball, Boys & Girls Lacrosse, Softball, and …

Become API certified in 510, 570, 653, 1169, and more. Learn how these trusted credentials help professionals succeed—start your certification journey today.

Nov 10, 2025 · APIs, or Application Programming Interfaces, are the invisible backbone of modern software development. They enable different applications, platforms, or systems to …

View 2025 API ICP exam dates, application deadlines, and fees. See which programs are offered remotely. Apply today to secure your spot!

Developers use APIs to bridge the gaps between small, discrete chunks of code in order to create applications that are powerful, resilient, secure, and able to meet user needs. Even though you …

Complete reference documentation for the OpenAI API, including examples and code snippets for our endpoints in Python, cURL, and Node.js.