A self-service lender portal provides lenders with a suite of tools for interacting with a multi-lender architecture configured to provide loan applicants with automated pre-qualification and eligibility evaluation for multiple candidate lenders. The lender portal provides lenders with an interface for uploading rule sets defining lending and eligibility criteria, downloading operational data generated from processing loan applicant information, generating and managing security keys for encryption and decryption of sensitive data, and managing access policies for providing single sign-on by interfacing with the lender's own identity management systems.