Freddie Mac Developer Portal

Innovative Insights to Power Your Business

Unlock the data you need to make faster, smarter decisions throughout the mortgage process.

Our APIs

Income Limits

Simplify your process of determining eligibility for affordable loan products and identify loans that may qualify for the Super Conforming Credit Fee waiver with easy access to area median income (AMI) and loan limit data.

Affordable Check

Help low-income borrowers choose the optimal mortgage path with an early look at Freddie Mac affordable product eligibility prior to submitting a full application to Loan Product Advisor®.

Unlock the Value of Freddie Mac APIs

Announcements

Upcoming Resolve Availability

May 6, 2025

Due to scheduled maintenance, the Resolve® application programming interfaces (APIs) will be unavailable from Saturday, May 10, at 11 p.m. ET until Sunday, May 11, at 11 a.m. ET.

Uniform Closing Dataset v2.0 Specification (UCD v2.0) supporting resources now available

October 14, 2024

Freddie Mac published the Uniform Closing Dataset v2.0 Specification (UCD v2.0) and supporting resources to provide clearer UCD XML file requirements to help sellers improve data quality. The UCD data is used to ensure common understanding of the loan transaction, detect fraud, determine purchase eligibility, improve delivery certainty and manage risk. Find these resources by clicking on the API Details link for Loan Closing Advisor Loan Submission from the API Catalog.

Ready to Put APIs to Work for You? Let’s Get Started.

January 28, 2024

With our APIs, you can get the data you need when you want it – to make faster, better decisions. Best of all, our Developer Portal makes it easy for you to explore our catalog, find solutions to your challenges and then build, test and implement them. Request access.

Now Available - Best Practices Guide for Integration with Freddie Mac APIs

January 28, 2024

Our Best Practices Guide for integration with Freddie Mac APIs is now available to help answer your integration questions. This document provides guidelines to ensure secure and efficient API utilization and can be found on by logging into Developer Portal and visiting the Related Documents page for the OAUTH API.

Articles

February 15, 2024

APIs: Bringing Value to the Mortgage Ecosystem

Our Selling application programming interfaces (APIs) help streamline loan selling and delivery processes.

July 11, 2023

Simplified Loan Origination? We’ve Got a Playbook for That

Access key loan information and data earlier in the process with our Origination APIs, helping you make smarter prequalification decisions and supporting a full digital preapproval experience.

May 1, 2025

How Full Suite of Resolve® Digital Tools Can Add Synergy to Your Servicing Ops

Read how Fifth Third Bank streamlined default management.

How it Works

Explore APIs

Browse our API Catalog, find the API's you want and explore the API integration documentation

Integrate

Create an App and use our sample code to help build your API integration.

Go Live

Request App promotion to production and go live

Testimonials

"Freddie Mac's Income Limits API enables us to qualify loans eligible for Credit Fee Caps in real time. The API helps ensure loan accuracy from manufacturing through commitment. Lenders who use our automated Freddie Mac Pricing and Commitment integration are confident in offering competitive pricing, reducing overall costs for borrowers."

Linus Petren, CEO, Novaprime

"The power of the integration lessens risks, cuts costs and streamlines our servicing processes, positioning us to grow even more."

RoundPoint Mortgage

"The Developer Portal and all the upfront documentation was very helpful and allowed [our] Tempo team to stand up an integration very quickly with minimal issues."

Sagent Lending

"MCT’s use of Freddie Mac’s Income Limits API has ensured we are pricing out loans with accurate LLPA values when we have loan sales. Given the complexities of the new income and region related LLPAs, this integration has allowed us to not skip a beat."

Bay Equity Home Loans

Interested in learning how our API solutions can add value to your business? Explore these resources showcasing our APIs across the mortgage process and their application by lenders and software providers.

Access to our Developer Portal is required to use our APIs. It’s the home of our API Catalog and provides self-service access to everything you need to build, test, and implement our API solutions.

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