About OneKey MLS
OneKey MLS (OKMLS) is the largest MLS in New York, stitching together Long Island, the five boroughs, and the Hudson Valley into one listing system. It is a young brand with old bones: the 2018-announced merger of MLSLI and the Hudson Gateway MLS created it, and the combined operation has run as OneKey since 2020. Agents anywhere from Montauk to Middletown looking at OneKey MLS IDX for their websites are tapping a single feed that used to take two memberships.
How OneKey came to be:
- MLSLI, the Multiple Listing Service of Long Island, brought Nassau and Suffolk counties plus deep Queens coverage
- Hudson Gateway MLS brought Westchester and the lower Hudson Valley, with association roots reaching back to the Westchester County Realty Board of 1916
- The two merged to form OneKey, announced in 2018 and operating under the OneKey name since 2020
- Expansion has continued, including the acquisition of Mid-Hudson MLS announced in late 2023 to deepen Dutchess County coverage
- Listing data spans all five boroughs of New York City alongside the suburban counties
Both legacy names still pull search traffic and still appear on old paperwork, so we keep dedicated pages for Long Island MLS and Hudson Gateway MLS alongside this one.
Coverage area
OneKey MLS serves agents and brokers across:
- New York - Long Island, New York City, and the Hudson Valley
The footprint by region:
- Nassau County: Hempstead, Garden City, Long Beach, and the North Shore
- Suffolk County: Huntington, Islip, Smithtown, and out east to the Hamptons and Montauk
- New York City: listing data across Queens, Brooklyn, the Bronx, Staten Island, and Manhattan
- Westchester County: Yonkers, White Plains, New Rochelle, and Scarsdale
- Rockland and Putnam counties: New City, Nyack, and Carmel
- Orange, Dutchess, and Sullivan counties: Newburgh, Middletown, Poughkeepsie, and the Catskills edge
Manhattan deal flow also runs heavily through REBNY's separate listing system, covered on its own page here. For the suburban counties and Long Island, OneKey is the definitive source.
How to get OneKey MLS listings on your website
OneKey distributes data through MLS Grid, with a review step that trips up unprepared applicants, so read step three twice:
- Be a OneKey participant or subscriber. Broker participants hold the data rights; agents ride on their broker's participation.
- CloseDaily starts the request through MLS Grid. OneKey issues its data through MLS Grid, and CloseDaily already operates on that platform, so the license request begins from an existing relationship rather than a cold application.
- E-sign the license and pass the website review. The data license arrives by email for signature, and OneKey then reviews both the signature and the actual website that will display listings. CloseDaily finalizes the connection after that approval.
- Launch on your domain. With credentials issued, CloseDaily connects the feed and brings search, listing pages, and alerts online.
The website review is the OneKey-specific wrinkle: the site needs to exist in reviewable form before approval, not after. CloseDaily builds your site to that reviewable state during onboarding, so what OneKey sees is the finished product.
CloseDaily and OneKey MLS
CloseDaily supports IDX integration for OneKey MLS. One feed covers your Long Island exclusives and your Westchester buyers, with search, CRM, lead capture, and follow-up living in the same login.
Downstate New York buyers cross county lines constantly, hunting value from Queens to Rockland. A OneKey-fed site keeps them searching with you across that whole map instead of bouncing between borough-specific portals.
Plans start at $299 per month, and there is a 7-day free trial with a credit card required. Onboarding covers the MLS Grid connection and launch, typically a few business days after OneKey signs off.
Start your 7-day free trial or Book a demo to see OneKey MLS home search on your own site.
Frequently asked questions
Does CloseDaily support OneKey MLS IDX?
Yes. CloseDaily supports IDX integration for OneKey MLS from Long Island through the Hudson Valley. We manage the MLS Grid connection and the website review preparation during onboarding.
How do I add OneKey MLS home search to my website?
CloseDaily initiates the request through its existing MLS Grid account, you and your broker e-sign the data license, and OneKey reviews the license and your website before approval. We prepare the site for that review and complete the feed work during onboarding.
What areas does OneKey MLS cover?
OneKey covers Nassau and Suffolk on Long Island, listing data across all five New York City boroughs, and the Hudson Valley counties of Westchester, Rockland, Putnam, Orange, Dutchess, and Sullivan. Its reach has kept growing, including the Mid-Hudson MLS acquisition announced in late 2023.
How long does OneKey MLS IDX setup take?
Signatures move fast; the OneKey website review is the step that sets the timeline. With the site ready for review at submission, approval and CloseDaily's onboarding work typically finish within a few business days each.
Is OneKey the same as MLSLI or Hudson Gateway MLS?
OneKey is their merger. MLSLI covered Long Island and Queens, Hudson Gateway covered Westchester and the lower Hudson Valley, and both operate today as OneKey MLS. We keep Long Island MLS and Hudson Gateway MLS pages for agents searching those names.
Does OneKey MLS cover Manhattan?
OneKey carries listing data for all five boroughs, Manhattan included. That said, much of Manhattan's inventory moves through REBNY's separate listing service, so agents focused on Manhattan often work both systems.
Related MLS coverage
- Long Island MLS - New York
- Hudson Gateway MLS - New York
- Real Estate Board of New York - New York
- Brooklyn MLS - New York
- Staten Island MLS - New York
OneKey MLS is a trademark of its respective owner. CloseDaily is an independent IDX and CRM provider. CloseDaily is not affiliated with, endorsed by, or sponsored by OneKey MLS or its parent organization.