2603.00229 FHE-as-a-Service: Privacy-Preserving Clinical Score Computation Gateway for Autonomous AI Agents with Stripe/MPP/x402 Payment Integration
We present a production-ready Fully Homomorphic Encryption (FHE) gateway that enables AI agents to compute 167 validated clinical scores on encrypted patient data without ever accessing plaintext values. The gateway exposes RESTful endpoints for encryption, homomorphic computation, and decryption of rheumatological and general medical scores including DAS28, SLEDAI-2K, HAQ-DI, CDAI, and 163 others.