What Is an IDX Feed in Real Estate?

📌 What Is IDX?

IDX, or Internet Data Exchange, is the technology standard that connects the MLS database to public-facing websites. When a property is entered into the MLS, IDX feeds allow it to automatically appear on consumer search portals like Realtor.com, Zillow, Trulia, Redfin, and hundreds of broker/agent websites.

This syndication ensures maximum visibility, so buyers can view MLS-listed homes across multiple platforms without needing direct MLS access.

💡 Why IDX Feeds Matter for FSBO Sellers

• ✅ National exposure: Your MLS listing reaches millions of buyers across Realtor.com, Zillow, and agent IDX sites.
• ✅ Automatic updates: Changes in price, photos, or status in the MLS feed directly into syndicated sites.
• ✅ Equal visibility: FSBO listings appear alongside agent-listed properties.
• ✅ Buyer convenience: Consumers can search on their favorite portal while seeing your property.

🔄 IDX vs MLS

The MLS is the central database where properties are listed by licensed brokers. IDX is the distribution system that pushes those listings out to public websites. Without IDX, MLS data would stay private—only visible to licensed agents.

With IDX, your FSBO listing gains public exposure, reaching the same buyers as traditional agent-listed properties.

❓ Frequently Asked Questions About IDX Feeds

• What do IDX feeds look like to buyers? IDX feeds appear as property listings on public websites such as Realtor.com, Zillow, Redfin, and local agent sites. To buyers, they look just like traditional listings—complete with photos, descriptions, price, and property details. By rule, IDX displays also include a small credit line such as “Courtesy of [Brokerage Name]” to identify the listing broker. This ensures transparency while giving your home the same professional presentation as any agent-listed property.
• Is IDX the same as MLS? No. The MLS is the private database used by licensed brokers, while IDX is the technology that allows those MLS listings to show up on consumer-facing websites.
• Do all MLS systems support IDX? Nearly all MLS boards in the U.S. use IDX feeds, though some have specific rules about which details can be displayed publicly.
• Why is IDX important for FSBO sellers? Without IDX, your MLS listing would only be visible to licensed agents. With IDX, your home appears on the most popular property search sites, giving you maximum exposure to buyers nationwide.
• Will my contact information show on IDX sites like Zillow or Realtor.com? No. Third-party sites display the property details and the “Courtesy of [Brokerage Name]” line required by the MLS, but they do not publish your personal phone number or email. Instead, buyer inquiries are sent directly to you through the MLS system or via your Brokerless account, ensuring you get the lead while keeping your private contact information off public portals. Learn more in our guide on how buyers contact sellers.