curl --request POST \
  --url https://api.virtuoussoftware.com/api/VolunteerOpportunity/{volunteerOpportunityId}/Volunteers \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "contactIndividualId": "<integer>"
}
'

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({contactIndividualId: '<integer>'})
};

fetch('https://api.virtuoussoftware.com/api/VolunteerOpportunity/{volunteerOpportunityId}/Volunteers', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://api.virtuoussoftware.com/api/VolunteerOpportunity/{volunteerOpportunityId}/Volunteers"

payload = { "contactIndividualId": "<integer>" }
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

using RestSharp;


var options = new RestClientOptions("https://api.virtuoussoftware.com/api/VolunteerOpportunity/{volunteerOpportunityId}/Volunteers");
var client = new RestClient(options);
var request = new RestRequest("");
request.AddHeader("Authorization", "Bearer <token>");
request.AddJsonBody("{\n  \"contactIndividualId\": \"<integer>\"\n}", false);
var response = await client.PostAsync(request);

Console.WriteLine("{0}", response.Content);

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.virtuoussoftware.com/api/VolunteerOpportunity/{volunteerOpportunityId}/Volunteers",
  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([
    'contactIndividualId' => '<integer>'
  ]),
  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;
}

HttpResponse<String> response = Unirest.post("https://api.virtuoussoftware.com/api/VolunteerOpportunity/{volunteerOpportunityId}/Volunteers")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"contactIndividualId\": \"<integer>\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.virtuoussoftware.com/api/VolunteerOpportunity/{volunteerOpportunityId}/Volunteers")

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  \"contactIndividualId\": \"<integer>\"\n}"

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

const url = 'https://api.virtuoussoftware.com/api/VolunteerOpportunity/{volunteerOpportunityId}/Volunteers';
const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({contactIndividualId: '<integer>'})
};

fetch(url, options)
  .then(res => res.json())
  .then(json => console.log(json))
  .catch(err => console.error(err));

{
  "id": "<integer>",
  "volunteerUrl": "<string>",
  "createDateTimeUtc": "<dateTime>",
  "createdByUser": "<string>",
  "modifiedDateTimeUtc": "<dateTime>",
  "modifiedByUser": "<string>",
  "contactId": "<integer>",
  "contactUrl": "<string>",
  "displayName": "<string>",
  "firstName": "<string>",
  "avatarUrl": "<string>",
  "primaryPhone": "<string>",
  "primaryEmail": "<string>",
  "totalHours": "<double>",
  "timesVolunteered": "<integer>",
  "volunteerAttendanceUrl": "<string>",
  "volunteerOpportunityId": "<integer>",
  "volunteerOpportunityUrl": "<string>"
}

{
  "message": "Authorization has been denied for this request."
}

{
  "message": "You do not have permission to perform this action."
}

{
  "message": "Rate limit exceeded. Try again later."
}