curl --request GET \
  --url https://api.hubapi.com/events/v3/event-definitions \
  --header 'Authorization: Bearer <token>'

import requests

url = "https://api.hubapi.com/events/v3/event-definitions"

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/events/v3/event-definitions', 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/events/v3/event-definitions",
  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/events/v3/event-definitions"

	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/events/v3/event-definitions")
  .header("Authorization", "Bearer <token>")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.hubapi.com/events/v3/event-definitions")

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": [
    {
      "archived": true,
      "associations": [
        {
          "allowsCustomLabels": true,
          "fromObjectTypeId": "<string>",
          "hasAllAssociatedObjects": true,
          "hasCascadingDeletes": true,
          "hasUserEnforcedMaxFromObjectIds": true,
          "hasUserEnforcedMaxToObjectIds": true,
          "hidden": true,
          "id": 123,
          "inverseAllowsCustomLabels": true,
          "inverseHasAllAssociatedObjects": true,
          "inverseId": 123,
          "inverseName": "<string>",
          "isDefault": true,
          "isInversePrimary": true,
          "isPrimary": true,
          "maxFromObjectIds": 123,
          "maxToObjectIds": 123,
          "name": "<string>",
          "portalUniqueIdentifier": "<string>",
          "readOnly": true,
          "toObjectTypeId": "<string>",
          "inverseLabel": "<string>",
          "label": "<string>"
        }
      ],
      "fullyQualifiedName": "<string>",
      "id": "<string>",
      "labels": {
        "singular": "<string>",
        "plural": "<string>"
      },
      "name": "<string>",
      "objectTypeId": "<string>",
      "properties": [
        {
          "description": "<string>",
          "fieldType": "<string>",
          "groupName": "<string>",
          "label": "<string>",
          "name": "<string>",
          "options": [
            {
              "hidden": true,
              "label": "<string>",
              "value": "<string>",
              "description": "<string>",
              "displayOrder": 123
            }
          ],
          "type": "<string>",
          "archived": true,
          "archivedAt": "2023-11-07T05:31:56Z",
          "calculated": true,
          "calculationFormula": "<string>",
          "createdAt": "2023-11-07T05:31:56Z",
          "createdUserId": "<string>",
          "currencyPropertyName": "<string>",
          "displayOrder": 123,
          "externalOptions": true,
          "formField": true,
          "hasUniqueValue": true,
          "hidden": false,
          "hubspotDefined": true,
          "modificationMetadata": {
            "archivable": true,
            "readOnlyDefinition": true,
            "readOnlyValue": true,
            "readOnlyOptions": true
          },
          "referencedObjectType": "<string>",
          "sensitiveDataCategories": [
            "<string>"
          ],
          "showCurrencySymbol": true,
          "updatedAt": "2023-11-07T05:31:56Z",
          "updatedUserId": "<string>"
        }
      ],
      "comboEventRules": {
        "composingRules": [
          {
            "count": 123,
            "eventTypeId": "<string>",
            "propertyFilters": [
              {
                "filterType": "PROPERTY",
                "operation": {
                  "includeObjectsWithNoValueSet": true,
                  "operationType": "<string>",
                  "operatorName": "<string>",
                  "propertyType": "bool",
                  "value": true,
                  "defaultValue": "<string>",
                  "renderSpec": "<string>"
                },
                "property": "<string>",
                "context": {
                  "objectTypeId": "<string>"
                },
                "filterInsightsId": 123,
                "frameworkFilterId": 123
              }
            ],
            "lookbackWindowDays": 123
          }
        ],
        "ruleBranches": "<array>"
      },
      "createdAt": "2023-11-07T05:31:56Z",
      "createdUserId": 123,
      "customMatchingId": {
        "primaryObjectRule": {
          "eventPropertyName": "<string>",
          "targetObjectPropertyName": "<string>"
        }
      },
      "description": "<string>",
      "detailTemplate": "<string>",
      "headerTemplate": "<string>",
      "primaryObject": "<string>",
      "primaryObjectId": "<string>",
      "updatedAt": "2023-11-07T05:31:56Z",
      "updatedUserId": 123
    }
  ],
  "total": 123,
  "paging": {
    "next": {
      "after": "<string>",
      "link": "<string>"
    },
    "prev": {
      "before": "<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"
  }
}