curl --request POST \
  --url https://api.hsforms.com/submissions/v3/integration/secure/submit/{portalId}/{formGuid} \
  --header 'Content-Type: application/json' \
  --data '
{
  "fields": [
    {
      "objectTypeId": "<string>",
      "name": "<string>",
      "value": "<string>"
    }
  ],
  "submittedAt": "<string>",
  "context": {
    "hutk": "<string>",
    "ipAddress": "<string>",
    "pageName": "<string>",
    "pageUri": "<string>",
    "pageId": "<string>",
    "sfdcCampaignId": "<string>",
    "goToWebinarWebinarKey": "<string>"
  },
  "legalConsentOptions": {},
  "skipValidation": true
}
'

import requests

url = "https://api.hsforms.com/submissions/v3/integration/secure/submit/{portalId}/{formGuid}"

payload = {
    "fields": [
        {
            "objectTypeId": "<string>",
            "name": "<string>",
            "value": "<string>"
        }
    ],
    "submittedAt": "<string>",
    "context": {
        "hutk": "<string>",
        "ipAddress": "<string>",
        "pageName": "<string>",
        "pageUri": "<string>",
        "pageId": "<string>",
        "sfdcCampaignId": "<string>",
        "goToWebinarWebinarKey": "<string>"
    },
    "legalConsentOptions": {},
    "skipValidation": True
}
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({
    fields: [{objectTypeId: '<string>', name: '<string>', value: '<string>'}],
    submittedAt: '<string>',
    context: {
      hutk: '<string>',
      ipAddress: '<string>',
      pageName: '<string>',
      pageUri: '<string>',
      pageId: '<string>',
      sfdcCampaignId: '<string>',
      goToWebinarWebinarKey: '<string>'
    },
    legalConsentOptions: {},
    skipValidation: true
  })
};

fetch('https://api.hsforms.com/submissions/v3/integration/secure/submit/{portalId}/{formGuid}', 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.hsforms.com/submissions/v3/integration/secure/submit/{portalId}/{formGuid}",
  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([
    'fields' => [
        [
                'objectTypeId' => '<string>',
                'name' => '<string>',
                'value' => '<string>'
        ]
    ],
    'submittedAt' => '<string>',
    'context' => [
        'hutk' => '<string>',
        'ipAddress' => '<string>',
        'pageName' => '<string>',
        'pageUri' => '<string>',
        'pageId' => '<string>',
        'sfdcCampaignId' => '<string>',
        'goToWebinarWebinarKey' => '<string>'
    ],
    'legalConsentOptions' => [
        
    ],
    'skipValidation' => true
  ]),
  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.hsforms.com/submissions/v3/integration/secure/submit/{portalId}/{formGuid}"

	payload := strings.NewReader("{\n  \"fields\": [\n    {\n      \"objectTypeId\": \"<string>\",\n      \"name\": \"<string>\",\n      \"value\": \"<string>\"\n    }\n  ],\n  \"submittedAt\": \"<string>\",\n  \"context\": {\n    \"hutk\": \"<string>\",\n    \"ipAddress\": \"<string>\",\n    \"pageName\": \"<string>\",\n    \"pageUri\": \"<string>\",\n    \"pageId\": \"<string>\",\n    \"sfdcCampaignId\": \"<string>\",\n    \"goToWebinarWebinarKey\": \"<string>\"\n  },\n  \"legalConsentOptions\": {},\n  \"skipValidation\": true\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.hsforms.com/submissions/v3/integration/secure/submit/{portalId}/{formGuid}")
  .header("Content-Type", "application/json")
  .body("{\n  \"fields\": [\n    {\n      \"objectTypeId\": \"<string>\",\n      \"name\": \"<string>\",\n      \"value\": \"<string>\"\n    }\n  ],\n  \"submittedAt\": \"<string>\",\n  \"context\": {\n    \"hutk\": \"<string>\",\n    \"ipAddress\": \"<string>\",\n    \"pageName\": \"<string>\",\n    \"pageUri\": \"<string>\",\n    \"pageId\": \"<string>\",\n    \"sfdcCampaignId\": \"<string>\",\n    \"goToWebinarWebinarKey\": \"<string>\"\n  },\n  \"legalConsentOptions\": {},\n  \"skipValidation\": true\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.hsforms.com/submissions/v3/integration/secure/submit/{portalId}/{formGuid}")

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  \"fields\": [\n    {\n      \"objectTypeId\": \"<string>\",\n      \"name\": \"<string>\",\n      \"value\": \"<string>\"\n    }\n  ],\n  \"submittedAt\": \"<string>\",\n  \"context\": {\n    \"hutk\": \"<string>\",\n    \"ipAddress\": \"<string>\",\n    \"pageName\": \"<string>\",\n    \"pageUri\": \"<string>\",\n    \"pageId\": \"<string>\",\n    \"sfdcCampaignId\": \"<string>\",\n    \"goToWebinarWebinarKey\": \"<string>\"\n  },\n  \"legalConsentOptions\": {},\n  \"skipValidation\": true\n}"

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

{
  "redirectUri": "<string>",
  "inlineMessage": "<string>"
}

{
  "errors": [
    {
      "message": "<string>",
      "errorType": "BLOCKED_EMAIL"
    }
  ]
}

{
  "category": "<string>",
  "correlationId": "<string>",
  "message": "<string>",
  "subCategory": "<string>",
  "errors": [
    {
      "message": "<string>",
      "in": "<string>",
      "code": "<string>",
      "subCategory": "<string>",
      "context": {}
    }
  ],
  "context": {},
  "links": {}
}

{
  "category": "<string>",
  "correlationId": "<string>",
  "message": "<string>",
  "subCategory": "<string>",
  "errors": [
    {
      "message": "<string>",
      "in": "<string>",
      "code": "<string>",
      "subCategory": "<string>",
      "context": {}
    }
  ],
  "context": {},
  "links": {}
}