US MLS Directory
Complete reference guide to MLS systems, RESO standards, and IDX data access across the United States. Find your local MLS and understand your data feed options.
National Organizations & Standards Bodies
Data Aggregation Platforms
Unified API access to multiple MLSs through a single integration
MLS Grid
Recommended30+ MLSs, single RESO-compliant license
Trestle (CoreLogic/Cotality)
90+ MLSs, RESO Platinum certified
Bridge Interactive (Zillow)
RESO Data Dictionary compliant
ListHub (realtor.com)
Listing syndication aggregator
Spark Platform (FBS)
SupportedFlexmls-backed MLSs, including Coeur d'Alene
Top 10 Largest MLS Systems
By subscriber count (REALTOR members with MLS access)
Regional MLS Directory
“”
New Jersey
Florida
North Carolina
Ohio
Texas
Colorado
Idaho
California
No MLS matches “”
Try a state, a metro area, or the MLS acronym. If yours is missing, we can still connect it.
Data Feed Platforms Comparison
Choose the right platform based on your coverage needs and technical requirements
MLS Grid
Recommended- 30+ MLS systems
- Single RESO-compliant license
- Unified API across all MLSs
- Real-time data updates
Trestle (CoreLogic)
- 90+ MLS systems
- RESO Platinum certified
- Enterprise-grade SLA
- Historical data access
Bridge Interactive (Zillow)
- RESO Data Dictionary compliant
- Zillow ecosystem integration
- RESTful API design
ListHub (realtor.com)
- Listing syndication focus
- Wide portal distribution
- Performance analytics
Integration Guide
RESO Web API
The modern standard for MLS data access. RESTful endpoints with OAuth 2.0 authentication.
- OData query syntax for filtering
- JSON response format
- Standardized field names (Data Dictionary)
- Real-time or near-real-time updates
Legacy RETS
Older standard still used by some MLSs. Being phased out in favor of RESO Web API.
- XML-based responses
- DMQL query language
- Non-standardized field names per MLS
- Being deprecated by most MLSs
HomeStar Integration
HomeStar handles all MLS integration complexity for you. We support:
Recommended. Single license covers 30+ MLSs.
Direct connections to any certified MLS.
Support for older MLS systems.
Related Data Partners
RentCast Property Data
Home valuations, market analytics, and property data enrichment. Powers our instant valuation and market report features.
Learn moreMore Integrations Coming
We're always adding new data partners to enrich your listings and provide more insights.
Ready to Connect Your MLS?
HomeStar handles all the complexity of MLS integration. Tell us which MLS you use, and we'll take care of the rest.