curl --request GET \
  --url https://api.hubapi.com/automation/v4/actions/{appId} \
  --header 'Authorization: Bearer <token>'

import requests

url = "https://api.hubapi.com/automation/v4/actions/{appId}"

headers = {"Authorization": "Bearer <token>"}

response = requests.get(url, headers=headers)

print(response.text)

const options = {method: 'GET', headers: {Authorization: 'Bearer <token>'}};

fetch('https://api.hubapi.com/automation/v4/actions/{appId}', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.hubapi.com/automation/v4/actions/{appId}",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "GET",
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"net/http"
	"io"
)

func main() {

	url := "https://api.hubapi.com/automation/v4/actions/{appId}"

	req, _ := http.NewRequest("GET", url, nil)

	req.Header.Add("Authorization", "Bearer <token>")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.get("https://api.hubapi.com/automation/v4/actions/{appId}")
  .header("Authorization", "Bearer <token>")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.hubapi.com/automation/v4/actions/{appId}")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Get.new(url)
request["Authorization"] = 'Bearer <token>'

response = http.request(request)
puts response.read_body

{
  "results": [
    {
      "actionUrl": "<string>",
      "functions": [
        {
          "id": "<string>"
        }
      ],
      "id": "<string>",
      "inputFields": [
        {
          "isRequired": true,
          "typeDefinition": {
            "name": "<string>",
            "options": [
              {
                "label": "<string>",
                "value": "<string>",
                "description": "<string>",
                "displayOrder": 123
              }
            ],
            "description": "<string>",
            "helpText": "<string>",
            "label": "<string>",
            "optionsUrl": "<string>",
            "referencedObjectType": "OWNER"
          },
          "supportedValueTypes": []
        }
      ],
      "labels": {},
      "objectTypes": [
        "<string>"
      ],
      "published": true,
      "revisionId": "<string>",
      "archivedAt": 123,
      "executionRules": [
        {
          "conditions": {},
          "labelName": "<string>"
        }
      ],
      "inputFieldDependencies": [
        {
          "controllingFieldName": "<string>",
          "dependencyType": "SINGLE_FIELD",
          "dependentFieldNames": [
            "<string>"
          ]
        }
      ],
      "objectRequestOptions": {
        "properties": [
          "<string>"
        ]
      },
      "outputFields": [
        {
          "typeDefinition": {
            "externalOptions": true,
            "name": "<string>",
            "options": [
              {
                "description": "<string>",
                "displayOrder": 123,
                "doubleData": 123,
                "hidden": true,
                "label": "<string>",
                "readOnly": true,
                "value": "<string>"
              }
            ],
            "schema": {
              "type": "INTEGER",
              "maximum": 123,
              "minimum": 123
            },
            "useChirp": true,
            "description": "<string>",
            "externalOptionsReferenceType": "<string>",
            "helpText": "<string>",
            "label": "<string>",
            "optionsUrl": "<string>"
          }
        }
      ]
    }
  ],
  "paging": {
    "next": {
      "after": "<string>",
      "link": "<string>"
    }
  }
}

{
  "message": "Invalid input (details will vary based on the error)",
  "correlationId": "aeb5f871-7f07-4993-9211-075dc63e7cbf",
  "category": "VALIDATION_ERROR",
  "links": {
    "knowledge-base": "https://www.hubspot.com/products/service/knowledge-base"
  }
}