curl --request GET \
  --url https://api.example.com/registry/actions/{action_name} \
  --cookie fastapiusersauth=

{
  "name": "<string>",
  "description": "<string>",
  "namespace": "<string>",
  "type": "udf",
  "origin": "<string>",
  "interface": {
    "expects": {},
    "returns": "<unknown>"
  },
  "implementation": {
    "template_action": {
      "definition": {
        "name": "<string>",
        "namespace": "<string>",
        "title": "<string>",
        "display_group": "<string>",
        "expects": {},
        "steps": [
          {
            "ref": "<string>",
            "action": "<string>",
            "args": {}
          }
        ],
        "returns": "<string>",
        "description": "",
        "doc_url": "<string>",
        "author": "<string>",
        "deprecated": "<string>",
        "secrets": [
          {
            "name": "<string>",
            "keys": [
              "<string>"
            ],
            "optional_keys": [
              "<string>"
            ],
            "optional": false
          }
        ]
      },
      "type": "action"
    },
    "type": "template"
  },
  "repository_id": "<string>",
  "id": "<string>",
  "action": "<string>",
  "is_template": true,
  "secrets": [
    {
      "name": "<string>",
      "keys": [
        "<string>"
      ],
      "optional_keys": [
        "<string>"
      ],
      "optional": false
    }
  ],
  "default_title": "<string>",
  "display_group": "<string>",
  "doc_url": "<string>",
  "author": "<string>",
  "deprecated": "<string>",
  "options": {
    "include_in_schema": true
  }
}