curl --request POST \
  --url https://server.promptwatch.com/api/v2/prompts/{id}/tags \
  --header 'Content-Type: application/json' \
  --header 'X-API-Key: <api-key>' \
  --data '
{
  "tags": [
    "<string>"
  ]
}
'

{
  "attached": 123,
  "tags": [
    {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "name": "<string>"
    }
  ]
}