Property Data APIs
Real Time, Fully Integrated Property DataLeading Real Estate Data API Ready to Fuel Your Business
ATTOM’s Property Data API is a self-serving platform that powers various industries with premium property data. We provide more – and more accurate – information than any of our competitors. Get real-time access to ATTOM’s property data for use in your website and/or applications, built upon the ATTOM data warehouse with scalable pricing and packaging.
Building AI Applications?
Looking to connect trusted property data directly to AI assistants, copilots, and agentic workflows? The ATTOM MCP Server provides AI-native access to ATTOM Intelligence through the Model Context Protocol (MCP), making it easy to power AI applications without custom API orchestration.
Discover ATTOM’s Real Estate Data API Difference
Covering 160+ million U.S. properties and 99% of the U.S. population, ATTOM's nationwide property data powers everything from traditional software applications to AI-driven experiences.
Data Depth
ATTOM empowers customers with better real estate data. We warehouse our data nationwide with myriad data points on each parcel including ownership information, lat/long, square footage, loan types, sales history, sales comps, crime, schools and more.
Stellar Support
ATTOM can set you up with a test drive that gives you access to our developer sandbox and knowledge base. One of ATTOM’s technical support team members will also be assigned to you, to ensure your questions are answered every step of the way.
Get a free trial API key and discover how ATTOM's Property Data API streamlines your data management and becomes your application's trusted property data source.
Building AI assistants, copilots, or agentic workflows? Explore the ATTOM MCP Server for AI-native access to ATTOM Intelligence.
Ready to Start Building?
ATTOM’s residential property API stands on the most comprehensive real estate and property data sets available to the market.
Client
Our clients make a request using a property address, parcel number (APN), ATTOM ID or even longitude and latitude coordinates.
API Connect
ATTOM's Property API platform supports both JSON and XML formats running REST conventions and can be used to perform on-demand and ad-hoc requests for targeting specific properties.
Data Warehouse
The depth and breadth of ATTOM's data warehouse supports these real estate APIs, and powers your software, websites, and apps with best of breed property and neighborhood data.
What is a property API?
A property API, or application programming interface, is a tool that delivers real-time property data directly into real estate applications or agent websites, enabling users to access up-to-date information and insights on local properties.
What is an API in real estate?
An API (also known as a property application programming interface) refers to an intermediary technology that transfers data between a data-producing application and another application. A real estate data API typically transfers real estate data from the MLS to a real estate application or website.
Is ATTOM API free?
Sign up for a free 30-day trial to receive an API key and explore ATTOM’s extensive property data through our Developer Platform. From there, you can review available endpoints, access documentation, and make sample API calls to determine which data best fits your application or use case. For larger or more customized data needs, you can also connect with an ATTOM data expert to discuss the right API solution for your business.
ATTOM Client Case Studies
See how our customers are using ATTOM’s Real Estate Data to fuel their innovation and growth.
ATTOM helps AgentFire create hyper-local real estate websites that set agents apart from the crowd.
SetSchedule utilizes ATTOM's Automated Valuation Model (AVM) to help power their SetValue network for homeowners.
How Can You Use ATTOM’s Property Data API?
Marketing
From mailing lists to targeted copy, ATTOM can insert value-added content into your online, digital, and print collateral.
Automated Forms
Simplify online forms for your customers with pre-populated information that they can verify.
Analytics
Start modeling faster with clean and current data. ATTOM’s Real Estate API supports your geography, volume, and response time needs.
Correlated Multi-Use
When a mix of property and neighborhood data is needed, ATTOM’s data is correlated with ATTOM ID for ease of use.
Free
Webinar
Powering Property Intelligence: Inside the ATTOM API & MCP Server
Join us as VP of Product Management, Sean Mooney, takes you through ATTOM’s modern approach to property data access. Learn how to leverage both direct integration through our industry-leading API and AI-native access through our MCP Server — giving you flexible, future-ready ways to work with ATTOM’s most comprehensive real estate datasets.
During this webinar, we will cover:
- How ATTOM’s API enables scalable, direct data delivery
- How the MCP Server introduces AI-native access for modern workflows
- How both can work together to support different integration approaches
