curl --request POST \
  --url https://api.hubapi.com/crm/extensions/calling/2026-03/inbound-call \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "createEngagement": true,
  "engagementProperties": {},
  "externalCallId": "<string>",
  "fromNumber": {
    "e164Number": "<string>",
    "extension": "<string>"
  },
  "potentialRecipientUserIds": [
    123
  ],
  "toNumber": {
    "e164Number": "<string>",
    "extension": "<string>"
  },
  "callStartedTimestamp": "2023-11-07T05:31:56Z",
  "durationSeconds": 123,
  "userId": 123
}
'

import requests

url = "https://api.hubapi.com/crm/extensions/calling/2026-03/inbound-call"

payload = {
    "createEngagement": True,
    "engagementProperties": {},
    "externalCallId": "<string>",
    "fromNumber": {
        "e164Number": "<string>",
        "extension": "<string>"
    },
    "potentialRecipientUserIds": [123],
    "toNumber": {
        "e164Number": "<string>",
        "extension": "<string>"
    },
    "callStartedTimestamp": "2023-11-07T05:31:56Z",
    "durationSeconds": 123,
    "userId": 123
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    createEngagement: true,
    engagementProperties: {},
    externalCallId: '<string>',
    fromNumber: {e164Number: '<string>', extension: '<string>'},
    potentialRecipientUserIds: [123],
    toNumber: {e164Number: '<string>', extension: '<string>'},
    callStartedTimestamp: '2023-11-07T05:31:56Z',
    durationSeconds: 123,
    userId: 123
  })
};

fetch('https://api.hubapi.com/crm/extensions/calling/2026-03/inbound-call', 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/crm/extensions/calling/2026-03/inbound-call",
  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([
    'createEngagement' => true,
    'engagementProperties' => [
        
    ],
    'externalCallId' => '<string>',
    'fromNumber' => [
        'e164Number' => '<string>',
        'extension' => '<string>'
    ],
    'potentialRecipientUserIds' => [
        123
    ],
    'toNumber' => [
        'e164Number' => '<string>',
        'extension' => '<string>'
    ],
    'callStartedTimestamp' => '2023-11-07T05:31:56Z',
    'durationSeconds' => 123,
    'userId' => 123
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "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/crm/extensions/calling/2026-03/inbound-call"

	payload := strings.NewReader("{\n  \"createEngagement\": true,\n  \"engagementProperties\": {},\n  \"externalCallId\": \"<string>\",\n  \"fromNumber\": {\n    \"e164Number\": \"<string>\",\n    \"extension\": \"<string>\"\n  },\n  \"potentialRecipientUserIds\": [\n    123\n  ],\n  \"toNumber\": {\n    \"e164Number\": \"<string>\",\n    \"extension\": \"<string>\"\n  },\n  \"callStartedTimestamp\": \"2023-11-07T05:31:56Z\",\n  \"durationSeconds\": 123,\n  \"userId\": 123\n}")

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

	req.Header.Add("Authorization", "Bearer <token>")
	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/crm/extensions/calling/2026-03/inbound-call")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"createEngagement\": true,\n  \"engagementProperties\": {},\n  \"externalCallId\": \"<string>\",\n  \"fromNumber\": {\n    \"e164Number\": \"<string>\",\n    \"extension\": \"<string>\"\n  },\n  \"potentialRecipientUserIds\": [\n    123\n  ],\n  \"toNumber\": {\n    \"e164Number\": \"<string>\",\n    \"extension\": \"<string>\"\n  },\n  \"callStartedTimestamp\": \"2023-11-07T05:31:56Z\",\n  \"durationSeconds\": 123,\n  \"userId\": 123\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.hubapi.com/crm/extensions/calling/2026-03/inbound-call")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"createEngagement\": true,\n  \"engagementProperties\": {},\n  \"externalCallId\": \"<string>\",\n  \"fromNumber\": {\n    \"e164Number\": \"<string>\",\n    \"extension\": \"<string>\"\n  },\n  \"potentialRecipientUserIds\": [\n    123\n  ],\n  \"toNumber\": {\n    \"e164Number\": \"<string>\",\n    \"extension\": \"<string>\"\n  },\n  \"callStartedTimestamp\": \"2023-11-07T05:31:56Z\",\n  \"durationSeconds\": 123,\n  \"userId\": 123\n}"

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

{
  "callerIdMatches": [
    {
      "callerIdType": "CONTACT",
      "objectCoordinates": {
        "objectId": 123,
        "objectTypeId": "<string>",
        "portalId": 123
      },
      "email": "<string>",
      "firstName": "<string>",
      "lastName": "<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"
  }
}