curl --request GET \
  --url https://backend.swap.coffee/v2/staking/{master_address} \
  --header 'X-Api-Key: <api-key>'

{
  "total_points": 123,
  "apr": 123,
  "total_locked_native": 123,
  "locked_tokens": [
    {
      "token": {
        "address": {
          "blockchain": "ton",
          "address": "native"
        },
        "metadata": {
          "name": "ARBUZ",
          "symbol": "ARBUZ",
          "decimals": 123,
          "listed": true,
          "image_url": "<string>"
        }
      },
      "normalizer": 123,
      "price_per_token_usd": 123
    }
  ],
  "distributed_rewards": [
    {
      "token_address": "EQDY6PMeMbQSz7dltNN4RRTIxyuBJX4dQESOy8cWR2tUgBxH",
      "asset_usd": 123,
      "asset_raw": 123
    }
  ],
  "actual_rewards": [
    {
      "token_address": "EQDY6PMeMbQSz7dltNN4RRTIxyuBJX4dQESOy8cWR2tUgBxH",
      "end_distribution_unix": 123,
      "reward_rate": 123
    }
  ],
  "periods": [
    {
      "period_id": 123,
      "percentage": 123,
      "lock_duration": 123
    }
  ],
  "calculated_at_time": 123
}