The San Antonio API is a local chapter of the national trade association of the American Petroleum Institute (API). The API represents all aspects of America's oil and natural gas industry. Membership comes from all segments of the industry, including the largest majors to the smallest of independents, refiners, pipeline operators, services and supply companies. The API supports a strong, viable oil and natural gas industry through advocacy, research, statistics, standards, certification and education.

The San Antonio Chapter of the API is comprised of individuals who work in and around oilfield related businesses. Our mission is to promote the fellowship and professional development of our members through the exchange of operational experience and operations oriented meeting programs, along with a variety of fund raising events which support educational scholarships and community service projects.