Timelines for MLSs Transitioning 100% to RESO Web API and Sunsetting RETS
The Real Estate Transaction Standard (RETS) is a data transport protocol that was created more than 20 years ago by a coalition of real estate industry thought leaders and the National Association of REALTORS®. This group eventually created RESO and its Data Dictionary. RESO deprecated RETS and developed its successor, the RESO Web API.
The industry’s utilization of the RESO Web API is accelerating quickly. At least 90% of MLSs in the industry have RESO-certified Web API services.
Vendors, brokers and agents have increased their usage of MLS Web API data feeds. Where it was once less than 5% of the industry in 2021, MLS feeds converted to Web API now cover 57.1% of U.S. subscribers. MLS feeds committed to Web API conversion cover 73.2% of U.S. subscribers.
RESO tracks the migration to the improved Web API standard. If your organization is not listed, please contact us to be included and consult our free Web API Transition Guide for advice.
Completed 100% Web API Transition
Allegheny Highland Association of REALTORS® Arizona Regional Multiple Listing Service (ARMLS) Association of Interior REALTORS® Bagnell Dam Association of REALTORS® Battle Creek Area Association of REALTORS® Big Bear Association of REALTORS® Big Sky Country MLS (Gallatin Association of REALTORS®) Billings Multiple Listing Service Branch County Association of REALTORS® bridgeMLS CBRAR Property Services CHS Regional MLS Canopy MLS (Canopy Realtor® Association) Central Texas MLS (CTXMLS) Central Virginia Regional MLS Coastal Carolinas Association of REALTORS® Des Moines Area Association of REALTORS® Doorify MLS East Tennessee REALTORS® Elko County Association of REALTORS® Fargo-Moorhead Area Association of REALTORS® Forgotten Coast REALTOR® Association Global MLS Golden Isles Association of REALTORS® Grand Junction Area REALTOR® Association Greater Erie Board of REALTORS® Greater Kalamazoo Association of REALTORS® Greater McAllen Association of REALTORS® Greater Metropolitan Association of REALTORS® Greater Northwoods MLS Greater Regional Alliance of REALTORS® Gulf Coast MLS (Mobile Area Association of REALTORS®) Hattiesburg Area Association of REALTORS® Heartland MLS High Country Association of REALTORS® Highland Lakes Association of REALTORS® Hillsdale County Board of REALTORS® IRES MLS Incline Village REALTORS® Intermountain MLS Jackson Multiple Listing Service Kanawha Valley Board of REALTORS® Kerrville Board of REALTORS® Lake of the Ozarks Board of REALTORS® Lawrence Board of REALTORS® Longleaf Pine REALTORS® MARIS MLS MIAMI REALTORS® MLS MIBOR Broker Listing Cooperative® MLS Now MLS of Greater Cincinnati (CincyMLS) |
Martin County REALTORS® of the Treasure Coast Mason Oceana Manistee Board of REALTORS® Midwest Real Estate Data (MRED) Montcalm County Association of REALTORS® Montgomery Area Association of REALTORS® North Texas Real Estate Information Systems (NTREIS) Northeast Oklahoma Board of REALTORS® Northwest Indiana Association of REALTORS® Northwest Ohio Real Estate Information Service (NORIS) Northwestern Wisconsin Multiple Listing Service Omni MLS Pikes Peak REALTOR® Services REALTORS® Association of Citrus County REALTORS® Association of Indian River County REsides Real Estate Board of New York (REBNY) Realtracs Regional Multiple Listing Service (RMLS) River Counties Association of REALTORS® Santa Fe Association of REALTORS® Savannah Multi-List Corporation Silver City Regional Multiple Listing Service South Texas MLS (Corpus Christi Association of REALTORS®) Southwest MLS (Greater Albuquerque AOR) Southwestern Michigan Association of REALTORS® Spokane Association of REALTORS® St. Joseph County Association of REALTORS® State-Wide MLS Stellar MLS Taos County Association of REALTORS® Tehachapi Area Association of REALTORS® Tennessee Virginia Regional MLS Terre Haute Area Association of REALTORS® Teton Board of REALTORS® Triad MLS Tulare County MLS UtahRealEstate.com Vail Multi-List Service ValleyMLS.com Vicksburg-Warren County Board of REALTORS® West Alabama Multiple Listing Service West Branch Valley Association of REALTORS® West Central Association of REALTORS® (MI) West Michigan Lakeshore Association of REALTORS® West Penn Multi-List Western Arizona REALTOR® Data Exchange (WARDEX) Western River Valley Board of REALTORS® Western Upstate Multiple Listing Service Williamsburg Multiple Listing Service Wiregrass REALTORS® |
- Organization
- Progress
- Projected
- Sunflower Association of REALTORS®
- 99%
- TBD
- RMLS Alliance
- 99%
- TBD
- Martha's Vineyard MLS
- 99%
- TBD
- Alaska Multiple Listing Service
- 99%
- TBD
- Marco Island Area Association of REALTORS®
- 99%
- TBD
- Staten Island Multiple Listing Service
- 99%
- TBD
- Baldwin REALTORS®
- 99%
- TBD
- Lowcountry Regional MLS (Beaufort-Jasper County REALTORS®)
- 99%
- 10/15/2025
- Maine Listings
- 99%
- TBD
- Columbia Board of REALTORS®
- 99%
- TBD
- OneKey® MLS
- 99%
- TBD
- Contra Costa Association of REALTORS®
- 98%
- TBD
- Aiken Association of REALTORS®
- 98%
- TBD
- Multiple Listing Service of Bonita Springs-Estero
- 98%
- 12/31/2025
- realMLS (Northeast Florida Multiple Listing Service)
- 98%
- 6/1/2025
- Tehama County Association of REALTORS®
- 98%
- 12/31/2025
- Coeur d'Alene Multiple Listing Service
- 98%
- 12/31/2025
- Prescott Area Association of REALTORS®
- 97%
- TBD
- Ozark Gateway Association of REALTORS®
- 97%
- 2/28/2025
- Cape Cod & Islands Association of REALTORS®
- 95%
- TBD
- Palm Beach Board of REALTORS®
- 95%
- TBD
- NorthstarMLS
- 95%
- TBD
- Hinesville Area Board of REALTORS®
- 95%
- TBD
- Bay East Association of REALTORS®
- 95%
- 12/31/2024
- Flint Hills Association of REALTORS®
- 95%
- TBD
- Northeast Washington Association of REALTORS®
- 95%
- TBD
- Greenwich Association of REALTORS®
- 95%
- TBD
- HiCentral MLS (Honolulu Board of REALTORS®)
- 94%
- TBD
- New Mexico MLS
- 92%
- 12/31/2024
- Cedar Rapids Area Association of REALTORS®
- 92%
- 3/31/2025
- First Multiple Listing Service (FMLS)
- 90%
- TBD
- Greater Chattanooga REALTORS®
- 90%
- 12/31/2024
- Northwest Multiple Listing Service (NWMLS)
- 90%
- TBD
- Northern Kentucky Multiple Listing Service
- 90%
- TBD
- MLS Technology
- 90%
- TBD
- REALTORS® Association of Northeast Wisconsin
- 90%
- TBD
- Capital Area Technology & REALTOR® Services
- 90%
- 12/31/2025
- MLS United
- 88%
- 3/31/2025
- Florida Gulf Coast Multiple Listing Service
- 85%
- TBD
- MLS Property Information Network (MLS PIN)
- 85%
- TBD
- MetroList
- 81%
- TBD
- Unlock MLS (Austin Board of REALTORS®)
- 80%
- TBD
- Northeast Iowa Regional Board of REALTORS®
- 80%
- TBD
- Imagine MLS (Bluegrass REALTORS®)
- 80%
- 8/1/2025
- South Central Kansas MLS
- 80%
- 5/1/2025
- Strategic MLS Alliance (Cullman / Shoals Area)
- 79%
- 12/31/2024
- Aspen Glenwood MLS
- 75%
- TBD
- Southern New Mexico MLS (Las Cruces AOR)
- 75%
- TBD
- Northern Arizona Association of REALTORS®
- 75%
- TBD
- Reelfoot Regional Association of REALTORS®
- 73%
- TBD
- Fresno MLS
- 73%
- TBD
- Central Panhandle Association of REALTORS®
- 70%
- TBD
- MOREMLS (Monmouth Ocean Regional REALTORS®)
- 65%
- 1/1/2025
- Maui MLS (REALTORS® Association of Maui)
- 65%
- TBD
- Pee Dee REALTOR® Association
- 65%
- 3/31/2025
- MLSOK
- 63%
- TBD
- Las Vegas REALTORS®
- 62%
- TBD
- Golden Triangle Association of REALTORS®
- 62%
- TBD
- Grand County Board of REALTORS®
- 61%
- TBD
- Lubbock Association of REALTORS®
- 60%
- 12/1/2025
- Tuolumne County Association of REALTORS®
- 60%
- TBD
- Northeast REALTORS® of Louisiana
- 60%
- TBD
- Bryan-College Station Regional Multiple Listing Service
- 57%
- TBD
- Houston Association of REALTORS®
- 50%
- TBD
- Lake Martin Area Association of REALTORS®
- 50%
- TBD
- Lake Havasu Association of REALTORS®
- 50%
- 12/31/2025
- Washington County Board of REALTORS®
- 50%
- TBD
- West Central Association of REALTORS® (MO)
- 50%
- 12/1/2026
- REcolorado®
- 45%
- TBD
- Great Plains Regional MLS
- 45%
- TBD
- Central New York Information Services (Greater Syracuse Association of REALTORS®)
- 42%
- TBD
- Realcomp
- 41%
- 12/31/2025
- Georgia MLS
- 40%
- TBD
- Middle Georgia MLS
- 40%
- TBD
- Plainview Association of REALTORS®
- 40%
- 3/31/2025
- Central Illinois Board of REALTORS®
- 39%
- TBD
- Bay Area Real Estate Information Services (BAREIS)
- 34%
- TBD
- Memphis Area Association of REALTORS®
- 31%
- TBD
- Southern Missouri Regional MLS
- 30%
- 12/31/2025
- Greater Binghamton Association of REALTORS®
- 29%
- TBD
- Outer Banks Association of REALTORS®
- 27%
- TBD
- Columbus and Central Ohio Regional MLS
- 26%
- 1/1/2025
- Summit MLS
- 25%
- TBD
- Lynchburg Association of REALTORS®
- 25%
- TBD
- Northern Great Lakes REALTORS® MLS
- 25%
- TBD
- Greater Lansing Association of REALTORS®
- 24%
- TBD
- Heart of Missouri Board of REALTORS®
- 20%
- TBD
- MiRealSource
- 20%
- TBD
- Hawaii Information Service (MLS Hawaii)
- 19%
- 12/31/2024
- Central Iowa Board of REALTORS®
- 15%
- TBD
- Firelands Association of REALTORS®
- 13%
- TBD
- Sanibel & Captiva Islands Association of REALTORS®
- 10%
- TBD
- Permian Basin Board of REALTORS®
- 10%
- TBD
- Colorado Real Estate Network (CREN)
- 10%
- 12/31/2026
- BeachesMLS
- 10%
- 3/1/2025
- Pacific Regional MLS
- 10%
- 5/1/2025
- ROAM MLS
- 8%
- TBD
- Bakersfield Association of REALTORS® / GEMLS
- 5%
- TBD
- Northeast Wyoming REALTOR® Alliance
- 5%
- TBD
- Northeast South Dakota Association of REALTORS®
- 5%
- TBD
- Naples Area Board of REALTORS®
- 5%
- TBD
- Northeast Georgia Board of REALTORS®
- 5%
- TBD
- Pueblo Association of REALTORS®
- 5%
- TBD
- Multiple Listing Service of Spartanburg
- 4%
- 6/1/2025
- Tillamook Board of REALTORS®
- 3%
- TBD
- Arkansas Valley Board of REALTORS®
- 3%
- TBD
- San Antonio Board of REALTORS®
- 3%
- TBD
- San Juan County Board of REALTORS®
- 3%
- TBD
- Greater Lehigh Valley REALTORS®
- 3%
- 12/31/2024
- San Francisco Association of REALTORS® MLS
- 2%
- 3/30/2025
- Mountain Home MLS (North Central Board of REALTORS®)
- 2%
- TBD
- Greater Alabama MLS
- 1%
- TBD
- Humboldt Association of REALTORS®
- 1%
- TBD
- New River Valley Association of REALTORS®
- 1%
- TBD
- Calaveras County Association of REALTORS®
- 1%
- TBD
- New York State Alliance of MLSs
- 1%
- TBD
- Santa Barbara Multiple Listing Service
- 1%
- 1/31/2024
- Central Missouri Board of REALTORS®
- 1%
- TBD
- Lee County Association of REALTORS®
- 1%
- TBD
- Hive MLS
- 1%
- 12/31/2025
- White Mountain Association of REALTORS®
- 1%
- TBD
Additional MLSs Committed to Web API Transition
CLASSIC MLS (Athens Area) Central Susquehanna Valley Board of REALTORS® MLS Charlottesville Area Association of REALTORS® East Alabama Board of REALTORS® East Central Indiana Board of REALTORS® East Central South Dakota REALTORS® Greater Tyler Association of REALTORS® Greenbrier Valley Board of REALTORS® Indiana Regional MLS Iowa City Area Association of REALTORS® LINK Lawton Board of REALTORS® Lincoln County Board of REALTORS® (NE) Longview Area Association of REALTORS® MLS of Southern Arizona |
Mammoth Lakes Board of REALTORS® MLS Mason City Multiple Listing Service Metro MLS Mount Rushmore Area Association of REALTORS® Mountain Central Association of REALTORS® NorthWest Illinois Alliance of REALTORS® Northwest Arkansas Board of REALTORS® Northwest Oklahoma Association of REALTORS® REALTOR® Association of Southern Minnesota REALTOR® Association of the Sioux Empire Ruidoso/Lincoln County Association of REALTORS® Sheridan County Board of REALTORS® Southern Oregon MLS Space Coast MLS (Space Coast Association of REALTORS®) The MLS |