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MLS Data Exchange (MDX): Enabling Intelligent Consolidation

March 25, 2025

Read the Whitepaper Here


Introduction and Purpose

Real estate data fuels decision-making for practitioners and consumers alike, delivering timely information critical to home buying and selling. Multiple Listing Service (MLS) organizations have long understood that facilitating access to this data beyond their traditional boundaries enhances market efficiency and supports their members—real estate brokers and agents—in serving clients effectively. 

Over time, MLSs have implemented diverse data-sharing strategies to address shifting consumer demands and market expansions propelled by consolidation and cooperative efforts. Yet, these initiatives stumble: disparate data dictionaries, conflicting business rules, and organizational politics obstruct progress, while technical issues and idiosyncrasies between vendor systems undermine the scalability and impact MLS executives strive to achieve.

This whitepaper introduces the MLS Data Exchange (MDX)—a unified framework designed to overcome these challenges and deliver true vendor system interoperability. Drawing on the Real Estate Standards Organization’s (RESO) foundation for standardized practices, MDX offers a transformative approach to unify operations and empower MLSs as stewards of market data. The sections that follow outline the current data-sharing landscape and introduce MDX as a strategic solution for an industry poised for change.

Authored by:

  • Andrew Coca, CEO, Modern.tech
  • Bill Fowler, President, SourceRE
  • Daniel Jones, CEO, Hive MLS

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