Software Partner Resource Center
Freddie Mac works with mortgage technology software partners to provide our mutual clients with access to Freddie Mac tools through their interfaces. Access the latest system specifications, verification testing instructions and specifications bulletins below.
Our Software Partner Resource Center is designed exclusively for software partners who have an established relationship with Freddie Mac and develop interfaces for our technology tools.
Software Partners: Please ensure your system interfaces remain current with the latest specifications and specification bulletins.
Freddie Mac Test Borrowers and Properties – Updated 8/8/2024
Loan Product Advisor®
Current Specification Bulletins & Amendments
- Loan Product Advisor System-to-System Specification Bulletin v6.0 – February 2025
- ULAD Resources
- Additional Resources
Loan Product Advisor system-to-system specifications are located on the Freddie Mac Developer Portal. Contact your Freddie Mac representative for access.
Verification Testing
Verification testing and test borrower data can be found on the Freddie Mac Developer Portal. Contact your Freddie Mac representative for access.
Loan Quality Advisor®
Specifications
- Loan Quality Advisor System-to-System Web Services Technical Documentation – Updated 5/10/2024
- Additional Resources
Verification Testing
- Loan Quality Advisor Merged Credit Update Test Binder – Updated 12/3/2024
- Loan Quality Advisor ULDD Regression Test Binder Phase 5 3.6 vFRE 6.0.0 – Updated 4/18/2025
Loan Selling Advisor®
Specifications
- Appendix D – Freddie Mac XML Data Requirements Reference Tool
- Pricing and Committing Loans through APIs
- ULDD Resources
Verification Testing
- Loan Selling Advisor ULDD Phase 4a Updates and Phase 5 Full Integration Test Binder vFRE 6.0.0 – 5/30/2024
- Loan Selling Advisor ULDD Phase 5 UAD 3.6 Regression Test Binder vFRE 6.0.0 – Updated 04/18/2025
- Pricing and Committing S2S Testing and Verification User Guide
*Note: Some specifications and verification testing files are password-protected. If you have questions or need further information, please contact your Software Partner representative directly or email the Software Partner team at [email protected].