Connected MLSs


Web4Realty helps you integrate OneKey MLS (ONEKEY) IDX data with your website. Read this quick guide on how to get IDX data onto common website builders like Wordpress, Squarespace, Wix, GoDaddy, and many others.


Key Facts

  • Membership Size: Onekey MLS is the largest multiple listing service in New York state, with a considerable membership of more than 45,000 real estate professionals. This massive number shows its significance and extensive coverage in the realm of the real estate market of this region.
  • Major Counties and Cities Covered:
    • Nassau and Suffolk Counties: These counties roofing a notable part of Long Island is pivotal for the suburban New York City real estate market and a vital service area of OneKey MLS. 
    • Westchester County: This area is known for its blend of urban and suburban properties and its proximity to New York City which makes it a crucial area for OneKey MLS.
    • Queens and Brooklyn: Though traditionally served by different MLS systems, OneKey MLS has expanded to include significant listings within these New York City boroughs, reflecting the MLS’s growth and integration strategy.
  • Historical Mergers: In 2020, two major MLS systems of New York State – The Multiple Listing Service of Long Island (MLSLI) and The Hudson Gateway Multiple Listing Service (HGMLS) merged to form OneKey MLS. This significant merger was aimed at facilitating real estate professionals of this region with comprehensive services and resources, offering them access to a wide range of property listings and information. 
  • Associations Served: OneKey MLS serves a broad spectrum of local real estate associations as such:
    • The Long Island Board of Realtors (LIBOR)
    • The Hudson Gateway Association of Realtors (HGAR)

Integrating OneKey MLS IDX data

Building IDX websites for OneKey MLS can be really easy or extremely difficult depending (1) how you choose to access the data and (2) whether or not you choose to work with an approved vendor.

Before we jump into the details, let’s start with the basics:

What is an IDX feed?

An IDX feed, or Internet Data Exchange feed, is a technology solution that allows real estate agents and brokers to display up-to-date property listings from their local Multiple Listing Service (MLS) on their websites or real estate platforms.

It enables real estate professionals to provide valuable property information to potential buyers and sellers on their website directly instead of directing clients to portals like Zillow and Redfin, thus enhancing their online presence and client engagement.

Why do I need an IDX feed for OneKey MLS?

If you want to create your online presence using your website, an IDX feed for Onekey MLS is going to be your business’s bloodline. It will help you improve your online experience for clients and prospects, demonstrate your local expertise, generate leads and overall boost your competitive edge in the local market. Moreover, access to IDX feed for Onekey MLS is a must if you wish to display active or sold listings from Onekey MLS on your website.

How do I get OneKey MLS listings on my website?

There are two ways to integrate OneKey MLS IDX data with your website:

(1) Get a direct IDX feed from the MLS. The responsibility of obtaining the direct IDX feed is upon you. You are responsible for downloading, maintaining, and managing the data, which can cost you $500-$2,000 per month in making it available on your website. Additionally, there is a list of paperwork and agreements from the Onekey MLS that you are supposed to complete. Not to forget, a one time setup fee and a monthly recurring fee for accessing the IDX feed is also charged. 

(2) Work with an approved IDX vendor. Vendors such as Web4Realty have direct access to Onekey MLS IDX data and can provide correct IDX data to approved members of Onekey MLS. You won’t have to worry about compliance issues, data vendor migrations, hosting fees, or uptime. Some providers, such as Web4Realty, even offer plugins for popular website platforms such as WordPress, Wix, Squarespace, and GoDaddy, allowing you to launch your website in minutes.

OneKey MLS Background

OneKey MLS is the largest comprehensive real estate database and toolset by geographic area in New York State, founded in 2020 through a merger of two major MLS systems of New York State – The Multiple Listing Service of Long Island (MLSLI) and The Hudson Gateway Multiple Listing Service (HGMLS). It aids professionals to access multiple property listings, market information, and tools for facilitating effective buying, selling, and leasing of properties. Over time, OneKey MLS has evolved significantly with technology, offering advanced property search features, mobile applications, online listing services, and training programs to their members to ensure the best service to their clients. These professionals are experts in residential, commercial, and rental properties and are bound by a code of ethics and principles.

What are the top cities served by OneKey MLS?

OneKey MLS covers a range of cities, including New York City, Yonkers, White Plains, New Rochelle, Mount Vernon, Scarsdale, Garden City, Hempstead, Freeport, Huntington, Massapequa, Smithtown, Riverhead, Port Jefferson, Babylon, Islip, Brookhaven, Southampton, East Hampton, and Montauk.

What are the top counties served by OneKey MLS?

OneKey MLS covers the following counties: Bronx, Kings (Brooklyn), Nassau, New York (Manhattan), Orange, Putnam, Queens, Richmond (Staten Island), Rockland, Suffolk, Sullivan, Ulster, and Westchester.

Which associations are part of OneKey MLS?

OneKey MLS covers a variety of real estate associations and boards, including the Hudson Gateway Association of Realtors, Long Island Board of Realtors, Bronx-Manhattan North Association of Realtors, Staten Island Board of Realtors, Greater Hudson Valley Multiple Listing Service, Multiple Listing Service of Long Island, Rockland County Board of Realtors, Orange County Association of Realtors, Sullivan County Board of Realtors, Putnam County Association of Realtors, Dutchess County Association of Realtors, Ulster County Board of Realtors, and Westchester County Board of Realtors.

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