API is the only national trade association that represents all aspects of America‘s oil and natural gas industry. Our 400 corporate members, from the largest major oil company to the smallest of independents, come from all segments of the industry. They are producers, refiners, suppliers, pipeline operators, and marine transporters, as well as service and supply companies that support all segments of the industry.
For more than 75 years, API has led the development of petroleum and petrochemical equipment and operating standards. These represent the industry‘s collective wisdom on everything from drill bits to environmental protection and embrace proven, sound engineering and operating practices and safe, interchangeable equipment and materials
API‘s target industries include the Petroleum and Natural Gas sectors.
API's standards are used worldwide and cover all aspects of the oil and natural gas industry
API's Monogram Certification program is used not only in the U.S. but also worldwide to ensure the availability of manufactured products and materials built to API standards. API's Engine Oil Licensing Systems verifies that engine oil meets API standards for durability and engine protection.