Glossary
What Is IDX (Internet Data Exchange)?
IDX (Internet Data Exchange) is a system that allows real estate agents and brokers to display MLS listings on their own websites. It's the technology behind the property search tools you see on agent and brokerage websites.
When you search for homes on a real estate agent's website, you're usually looking at an IDX feed — a live connection to the local MLS that pulls in property listings and displays them on the agent's site.
How IDX works
- The local MLS provides an IDX data feed to participating brokers and agents - Agents install IDX software (from vendors like iHomefinder, IDX Broker, or Showcase IDX) on their websites - The software pulls listings from the MLS and displays them with search and filter tools - Leads who search on the site can be captured for follow-up
Why IDX matters for businesses selling to agents
IDX is a major expense and technology decision for agents. Companies selling IDX solutions, website builders, or CRM tools with IDX integration need to reach agents directly. A verified agent email list lets IDX vendors market to the 553,000+ licensed agents who are potential customers.
IDX vs VOW (Virtual Office Website)
- IDX: Publicly accessible, shows listings to anyone visiting the site - VOW: Requires user registration before displaying full listing data
Changes ahead
The NAR settlement is driving changes to how listing data is shared and displayed. IDX vendors and agents are adapting to new rules around commission transparency and data access.
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