curl --request POST \
  --url https://api.hubapi.com/webhooks-journal/subscriptions/2026-03/filters \
  --header 'Content-Type: application/json' \
  --data '
{
  "filter": {
    "conditions": [
      {
        "filterType": "CRM_OBJECT_PROPERTY",
        "property": "<string>",
        "value": "<string>",
        "values": [
          "<string>"
        ]
      }
    ]
  },
  "subscriptionId": 123
}
'

import requests

url = "https://api.hubapi.com/webhooks-journal/subscriptions/2026-03/filters"

payload = {
    "filter": { "conditions": [
            {
                "filterType": "CRM_OBJECT_PROPERTY",
                "property": "<string>",
                "value": "<string>",
                "values": ["<string>"]
            }
        ] },
    "subscriptionId": 123
}
headers = {"Content-Type": "application/json"}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({
    filter: {
      conditions: [
        {
          filterType: 'CRM_OBJECT_PROPERTY',
          property: '<string>',
          value: '<string>',
          values: ['<string>']
        }
      ]
    },
    subscriptionId: 123
  })
};

fetch('https://api.hubapi.com/webhooks-journal/subscriptions/2026-03/filters', 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/webhooks-journal/subscriptions/2026-03/filters",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'filter' => [
        'conditions' => [
                [
                                'filterType' => 'CRM_OBJECT_PROPERTY',
                                'property' => '<string>',
                                'value' => '<string>',
                                'values' => [
                                                                '<string>'
                                ]
                ]
        ]
    ],
    'subscriptionId' => 123
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json"
  ],
]);

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

curl_close($curl);

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

package main

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

func main() {

	url := "https://api.hubapi.com/webhooks-journal/subscriptions/2026-03/filters"

	payload := strings.NewReader("{\n  \"filter\": {\n    \"conditions\": [\n      {\n        \"filterType\": \"CRM_OBJECT_PROPERTY\",\n        \"property\": \"<string>\",\n        \"value\": \"<string>\",\n        \"values\": [\n          \"<string>\"\n        ]\n      }\n    ]\n  },\n  \"subscriptionId\": 123\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Content-Type", "application/json")

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

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

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.hubapi.com/webhooks-journal/subscriptions/2026-03/filters")
  .header("Content-Type", "application/json")
  .body("{\n  \"filter\": {\n    \"conditions\": [\n      {\n        \"filterType\": \"CRM_OBJECT_PROPERTY\",\n        \"property\": \"<string>\",\n        \"value\": \"<string>\",\n        \"values\": [\n          \"<string>\"\n        ]\n      }\n    ]\n  },\n  \"subscriptionId\": 123\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.hubapi.com/webhooks-journal/subscriptions/2026-03/filters")

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

request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "{\n  \"filter\": {\n    \"conditions\": [\n      {\n        \"filterType\": \"CRM_OBJECT_PROPERTY\",\n        \"property\": \"<string>\",\n        \"value\": \"<string>\",\n        \"values\": [\n          \"<string>\"\n        ]\n      }\n    ]\n  },\n  \"subscriptionId\": 123\n}"

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

{
  "filterId": 123
}

{
  "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"
  }
}