curl --request GET \
  --url https://mag3nt.com/api/cards \
  --header 'Authorization: Bearer <token>'

{
  "cards": [
    {
      "id": "sx_a66a6666-1234-5678-9abc-def012345678",
      "token": "tok_3b9fe670-abcd-efgh-ijkl-mnopqrstuvwx",
      "purpose": "Research Agent",
      "limit_amount": 50,
      "status": "ACTIVE",
      "mcc_locks": "",
      "single_use": 0,
      "expires_at": "2023-11-07T05:31:56Z",
      "funding_network": "eip155:8453",
      "funding_asset": "USDC",
      "wallet_address": "0x1234...abcd",
      "balance": 0,
      "remaining": 50,
      "created_at": "2023-11-07T05:31:56Z"
    }
  ]
}