Syndicate listings to portals via a listing syndication feed

Steps

1. Confirm your brokerage's syndication authorization with your MLS; most MLSs control which portals receive broker listings and require opt-in or opt-out per broker before feeds are activated
2. Establish a RESO Web API or RESO-compliant data feed from your MLS to your syndication layer; platforms like ListHub or direct MLS data agreements channel listings to partner portals
3. Map your listing fields to each target portal's required schema; major portals (Zillow, Realtor.com, Homes.com) each publish their own feed specifications that are broadly RESO-aligned but have portal-specific required fields
4. Deliver listing updates incrementally using ModificationTimestamp as your change watermark; send creates, updates, and status-change tombstones (marking listings as inactive when they leave Active status)
5. Monitor portal feed acceptance logs and rejection reports for each destination; common rejections include missing required fields, invalid enumeration values, and photo compliance failures
6. Honor listing agent and broker opt-out flags in the source feed; never syndicate a listing to a portal the broker has not authorized in the MLS system