***Click here for the latest, more comprehensive guide to the Best Real Estate APIs***
Real estate APIs provide real-time access to critical housing market data. These tools are valuable for professionals and developers looking to automate updates across platforms, applications, and websites—helping deliver accurate, up-to-date property information to clients and users.
In this post, we explain what a real estate API is and highlight five leading solutions currently available.
What is a Real Estate API?
Realtyna defines an API as:
“A software tool that acts as an intermediary between an application and the data produced by another application. APIs package functions for retrieving this information, which allows for greater speed and agility with any related programming.”
In the real estate world, APIs (short for application programming interfaces) are used to transfer property-related data from one source to another—typically powering real estate platforms, apps, and internal systems with dynamic property records. They streamline data retrieval, minimize hosting costs, and improve automation workflows.
Real Estate APIs: 5 of the Best Real Estate APIs
With more than 200 options on the market today, how do you find the right real estate API for your needs? Here are five top solutions to consider:
1. Estated API
Estated provides data on over 140 million U.S. properties, including both residential and commercial. It offers insights into property structure, parcel details, sales history, assessments, and more. The platform is built for quick integration and supports businesses focused on analytics, workflow efficiency, and lead generation.
Their pricing includes a free tier for the first 100 records, with more advanced plans offering volume discounts and onboarding support.
2. Realtors Property Resource API
The Realtors Property Resource API enables integration of public property data directly into web platforms. With nationwide coverage of more than 130 million property records, the API offers access to:
-
Public records
-
Deed history
-
Mortgage transactions
Note: Access is currently limited to authorized organizations within the real estate industry.
3. SimplyRETS API
The SimplyRETS API provides residential property data through a developer-friendly interface. It’s designed for real estate websites and apps that require real-time market data.
The platform offers three subscription plans:
-
Basic: 5,000 daily searches
-
Premium: 10,000 daily searches, includes additional data fields such as sold and under-contract properties
-
Enterprise: 50,000 searches per day and expanded data coverage, including commercial properties and land parcels
4. Spark API
Spark API delivers real estate data through a standardized API designed for authorized professionals and technology partners. It organizes information into three core categories:
-
Property-level data
-
Contacts
-
Market statistics
Access varies based on user permissions, with broader datasets available to industry professionals.
5. ATTOM Property API
We may be biased, but the ATTOM Property API offers one of the most comprehensive property datasets in the U.S., covering over 158 million properties and 99% of the population. It includes:
-
Parcel and boundary details
-
Ownership and deed records
-
Tax, mortgage, and foreclosure data
-
Neighborhood-level insights (schools, crime, demographics)
ATTOM’s platform is built to support a wide range of use cases—from investment and valuation tools to AVMs and AI model training. Free demos and developer support are available to help teams get started quickly.
Top Real Estate APIs
Every year, more and more real estate APIs enter the market. The best real estate API for you depends on your budget, business needs, and technical proficiency. Keep our list of five of the leading APIs on the market when you start to narrow down your options
Curious to try our leading real estate API? Arrange a free demo with our team here.
