We're excited to announce that RESO is an Official Partner of Blueprint for the second year in a row. Join us in Las Vegas at the Venetian, September 16–18, to experience the best of …

The RESO Data Dictionary is the real estate industry’s universal language for data. It allows a wide range of systems to talk to each other in a seamless manner.

RESO tests technology systems to confirm compliance with ratified standards. Certification, which is complimentary for RESO members, provides evidence that a technology system speaks an …

Oct 30, 2025 · Each year, RESO organizes its spring conference in the U.S., its fall conference in the U.S., the International MLS Forum in rotating countries and live virtual training webinars.

The RESO Web API is the modern way to transport data in the real estate industry. It is built on well-known, open technology standards so that any organization can use it to deliver or …

RESO is an independent, nonprofit standards body formed to develop data standards and processes that create efficiencies for all participants in real estate transactions.

RESO provides the foundation for streamlined real estate technology through the creation and certification of standards. Our member organizations include MLSs, brokerages, REALTOR® …

Certification RESO testing processes for technical standards conformance and certification endorsements

What does it mean for an MLS to be certified by RESO? Being certified by RESO means an MLS’s technology systems can talk to other technology systems in a standardized manner. …

Select any of the links below to download. By doing so you agree to the EULA. Current Specifications and Supporting Materials RESO Web API Core 2.0.0 Specification Data …