"error": "invalid_request", "message": "Missing required field: patient_id", "status": 400
POST /appointments Content-Type: application/json "patient_id": "MRN-10045", "provider_id": "DR-8823", "start_time": "2026-04-20T14:00:00Z", "end_time": "2026-04-20T14:30:00Z", "reason": "Follow-up hypertension" api bronson
OAuth 2.0 (Client Credentials or Authorization Code flow) "message": "Missing required field: patient_id"
"access_token": "eyJhbGciOiJIUzI1NiIs...", "expires_in": 3600, "token_type": "Bearer" api bronson