Submit a UAD 3.6 appraisal report package to the Uniform Collateral Data Portal via the Direct Integration API

Steps

1. Prepare the UAD 3.6 appraisal delivery package as a ZIP archive containing the XML data file, a human-readable PDF, and all associated images and exhibits, conforming to the UAD 3.6 schema
2. Use the UCDP pre-validation API (available since September 2025) to check the ZIP package against UAD 3.6 data rules before submission, resolving any field presence or type errors
3. Authenticate to the UCDP Direct Integration API using the lender's UCDP credentials and submit the ZIP package via the DI API upload endpoint, receiving a submission ID
4. Poll the submission status endpoint using the submission ID until the UCDP returns a final status of Successful, Successful with Warnings, or Failed
5. Retrieve the UCDP submission summary report, which includes SSR (Submission Summary Report) data, risk flags, and any hard-stop conditions that must be resolved before delivery
6. Store the Fannie Mae Document File ID and Freddie Mac Document File ID from the SSR in the LOS for use during loan delivery to the respective GSE