Measurable Data Token (MDT) is a decentralized data exchange ecosystem that aims to connect users, data providers, and data buyers. It seeks to denominate the value of data, providing a platform where data can be exchanged securely and anonymously. MDT is built on the Ethereum Blockchain and is a standard ERC 20 token, facilitating the economy of the MDT ecosystem. It is issued by Measurable Foundation Ltd, a public company registered in Singapore. MDT is a utility token and is not intended to have any particular value outside the MDT ecosystem. It is designed to reward users for sharing anonymous data points while providing data buyers and providers with a more efficient trading model.

MDT operates by connecting data providers, users, and data buyers, and denominates the value of data when exchanged. It uses smart contracts, which are applications stored in the Ethereum blockchain, constructed by data providers, data buyers, and the MDT platform. These smart contracts help enforce the performance of the contracts. The MDT ecosystem includes a Measurable Data SDK, an open-source and free Software Development Kit offered for any data providers or developers to use. The SDK includes a wallet address which users can use to manage the compensation they receive from the MDT ecosystem.

MDT has several potential use cases. One of the primary uses is in the data exchange economy. Users who share their anonymous unidentifiable data receive compensation from the MDT ecosystem. Data buyers, such as merchants, advertisers, investors, big data institutes, or other companies that require the data to predict trends or make decisions, can purchase the right of use of the data points during the exchange. Another use case is in advertising, where users can utilize their email signature as an advertising placement. Users can also send "VIP Mail" to utilize their accumulated MDT.

MDT was issued by Measurable Foundation Ltd, a public company limited by guarantee registered in Singapore, and approved and registered by Singapore Accounting and Corporate Regulatory Authority (ACRA). The Measurable foundation is dedicated to developing and promoting the MDT ecosystem and dedicates its resources in Research, Development, and Governance. The first component of the MDT ecosystem is MailTime Email Messenger, a messenger solution based on the email protocol. MailTime Email Messenger was the first service to adopt the MDT ecosystem and utilize it as a system to compensate all parties involved.