APX's mission is to empower the world's transition to sustainable energy. APX's combination of our 15+ years of pioneering en ... vironmental markets and our 20+ year history of providing technology solutions to wholesale power participants drives our broad spectrum of sustainable energy solutions. We partner with renewable power producers, innovative utilities, enlightened commercial and industrial consumers as well as top government agencies and NGO’s. Registry solutions provided by APX include: REC Registries (MIRECS, NAR, NC RETS, NEPOOL GIS, NYGATS, TIGRs, WREGIS) Mitigation Project Registries (American Carbon Registry, Climate Action Reserve, VERRA) Allowance Trading, Sustainable Sourcing, meta-registries and solutions for NDC implementation (Massachusetts, the Environmental Management Account) read more