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Learn how we engage with policy makers to ensure safe, reliable, and affordable energy for the future as demand continues to grow.

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Energy Insights

API's Energy Insights Hub provides updated statistics, data visualizations, timely analysis, and in-depth reports on all aspects of the oil and natural gas industry.

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Global Industry Services

API’s Global Industry Services drives safety and efficiency within the oil and gas industry through standards, certifications, assessments, training and more.

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Certifications Directories

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DEF Licensee Directory

Products + Services / Diesel Exhaust Fluid (DEF) / Licensee Directory

View Licensee Directory

Click the link above to be redirected to the online DEF Directory of Licensees where you can search all active licensees and all their licensed products.