Technology Integration

Technology Integration Resources

Important: Beginning November 19, 2021, your ability to access Fannie Mae URLs and/or applications will be impacted if you haven’t updated your browser and/or client software to the latest version. 
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As a vendor integrated with our technology, you have resources and services available to you when you need it. Below you’ll find detailed information and solutions, and if you need any assistance, our team is here to support you.

Integrated Vendor List

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Product Outage Information

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Browse our list of technical integration resources to learn more about how to stay current, compliant, and future-forward. Click here to view our full Technology Integration Archive.


Data Standards Supporting Resources
Data Standards File Formats Specification
Legacy Data Standards File Formats Specification Integration Test Cases
Desktop Underwriter Technology Service Provider List
Data Standards File Format Specification (Loan Application)
Legacy Data Standards File Formats Specification (Loan Application)
Data Standards File Format Specification (Loan Delivery)
Test Cases (Loan Application)
Legacy Data Standards File Formats Specification (Loan Application) Test Cases
Test Cases (Loan Delivery)

Product Outage Information

Day or night, we’re here to help you find the answers you need. See a list of our technology hours of availability when you need assistance troubleshooting your Fannie Mae applications.

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Technology Solutions Center

Your go-to resource for information and technology support when you need it most. 


Integration Support

For integration related questions, please reach out to [email protected].

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Production Support

For production related issues, check out our Technology Support Center or call us at 1-800-2FANNIE (1-800-232-6643).

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Digital Alliances Support

For relationship specific questions, please contact [email protected].

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Frequently Asked Questions

Assuming commitment from the prospective partner and lender customer(s), the process can take anywhere from two (2) to six (6) months.

The process varies by product but typically includes data and design architecture, establishment of connectivity, and functional testing.

Testing occurs through the Fannie Mae integration testing environment. Your company will be provided test credentials during the onboarding process.