curl --request GET \
  --url https://api.opper.ai/v2/functions \
  --header 'Authorization: Bearer <token>'

{
  "meta": {
    "total_count": 123
  },
  "data": [
    {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "name": "<string>",
      "revision_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "description": "<string>",
      "instructions": "<string>",
      "model": [
        "openai/gpt-4o",
        "openai/gpt-4o-mini"
      ],
      "is_v3": false
    }
  ]
}