curl --request GET \
  --url https://api.coval.dev/v1/personas/voices \
  --header 'X-API-Key: <api-key>'

{
  "voices": [
    {
      "voice_name": "aria",
      "supported_languages": [
        "bg-BG",
        "da-DK",
        "en-AU",
        "en-IN",
        "en-GB",
        "en-US",
        "fr-FR",
        "de-DE",
        "hi-IN",
        "lt-LT",
        "cmn-CN",
        "pl-PL",
        "es-ES",
        "es-US"
      ]
    },
    {
      "voice_name": "raju",
      "supported_languages": [
        "en"
      ]
    },
    {
      "voice_name": "isabella",
      "supported_languages": [
        "en",
        "es"
      ]
    }
  ]
}