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Certifications Directories


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The API Certification Programs provides the following FREE directories:

  • The API Composite List - lists companies participating in the API Monogram Program, API’s Quality and Environmental Management System Registration Programs, Perforator Design Registration.
  • Registered Perforator Designs - lists the companies with perforator design registrations.
  • Individual Certification Program (ICP) Directory - provides an easy to use method for locating API/ICP certified personnel. It provides the ability to search by certification type and/or geographic location.
  • Engine Oil Licensing and Certification System (EOLCS) Licensee Directory - lists Brand Names belonging to Engine Oil Licensees; SAE Viscosity Grades for Gasoline and Diesel Engines; API Service Categories; Countries with Engine Oil Licensees, and States and Provinces in North America with Engine Oil Licensees.
  • Diesel Exhaust Fluid (DEF) Certification Program Licensee Directory - lists Marketers and their relevant Brands who are licensed to use the API DEF or Marine DEF Certification Marks; Countries with DEF Licensees, and States and Provinces in North America with DEF Licensees.
  • Motor Oil Matters (MOM) Licensing and Certification Program Licensee Directory - lists API Certified Oil Change Locations and API Certified Oil Distributors with Address and Contact Information within the United States of America.
  • API WorkSafe Online Directory - is publicly accessible and used to search for service station contractors with valid API Safety Keys.  Many different criteria can be used narrow the search.  In addition, advanced mapping features are available.
  • Thread Gauge Certification Agencies - Listing of independent agencies who have notified API that they certify gauges in accordance with API Specifications 5B, 7-2 and/or 11B.