The World's First Mutual Aid Marketplace On BlockChain. Use blockchain technology to embed trust into transactions. It can dramatically improve efficiency and lower operational cost for insurers. Medishares is a blockchain based, decentralized, open-source mutual aid marketplace. Anyone can join a mutual aid scheme through sending variable amount of MDS to a smart contract. Anyone can become a mutual aid insurer based on the smart contract templates provided by MediShares, and can profit from it.