Card Recommendations API

POST /v1/recommendations/cards
Authorization: Bearer YOUR_API_KEY
Content-Type: application/json

{
  "user_id": "user-123",
  "transactions": [
    {
      "amount": 1200,
      "category": "food",
      "merchant": "Swiggy",
      "timestamp": "2024-01-15T10:00:00Z"
    },
    {
      "amount": 5000,
      "category": "travel",
      "merchant": "IRCTC",
      "timestamp": "2024-01-14T08:00:00Z"
    }
  ],
  "user_cards": [
    {
      "card_id": "existing-1",
      "bank_name": "ICICI",
      "card_name": "Amazon Pay"
    }
  ],
  "preferences": {
    "prioritize_cashback": true,
    "prioritize_travel": false,
    "prioritize_lounge": false,
    "max_annual_fee": 5000,
    "income_range": "medium"
  },
  "options": {
    "limit": 5,
    "include_explanations": true,
    "exclude_user_cards": true
  }
}