The MCM methodology is designed to be a transparent blueprint to quantify and credit the generation of soil inorganic carbon using microbes on agricultural land. This document is the culmination of many years of work across the Andes team, leading academic institutions, USDA scientists, agricultural communities, and carbon market experts. The methodology has been validated by Earthood, an accredited auditor, in accordance with ISO 14064, an established international standard of carbon project quantification, monitoring, and reporting. Andes developed this methodology with EcoEngineers and external experts in geochemistry, soil science, environmental microbiology, agriculture, and carbon removal.