curl --request POST \
  --url https://api.promptstream.ai/get_prompt \
  --header 'Content-Type: application/json' \
  --header 'X-API-Key: <x-api-key>' \
  --data '
{
  "prompt_id": "<string>",
  "inputs": {},
  "external_user_id": "<string>"
}
'

{
  "prompt_text": "<string>",
  "variant_assigned": "<string>",
  "experiment_id": "<string>"
}