curl --request GET \
  --url https://api.barker.money/api/partner/products/{slug}/apy-history \
  --header 'X-Api-Key: <api-key>'

{
  "success": true,
  "data": [
    {
      "date": "2026-05-04",
      "underlying_apy": "0.0612",
      "net_apy_for_user": "0.0490"
    },
    {
      "date": "2026-05-03",
      "underlying_apy": "0.0598",
      "net_apy_for_user": "0.0478"
    },
    {
      "date": "2026-05-02",
      "underlying_apy": "0.0605",
      "net_apy_for_user": "0.0484"
    }
  ]
}