Companies that have successfully obtained MEF 3.0 certification for their LSO APIs.

MEF LSO API Certified Companies

The MEF LSO API Certification Registry is the authoritative listing of MEF member companies that have achieved LSO Sonata or LSO Cantata API certification.

MEF 3.0 LSO API certification validates that these market-leading companies have demonstrated that their APIs conform to use case and business requirement specifications established by the industry’s defining authority for standardized, automated network-based services.

MEF Certified 3.0 Logo - Blue

LSO API Certification Registry


Be In the Business—Demonstrate compliance with industry best practices.

Contact Us with Questions