curl --request POST \
  --url https://api.zivio.net/api/v4/projects/{id}/cancel \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'zivio-tenant-id: <api-key>' \
  --data '
{
  "reason_code_id": 12,
  "custom_reason": "The requirement has been withdrawn by the budget owner.",
  "cancellation_reason_id": 3,
  "cancellation_other_reason": "Duplicate of an existing engagement."
}
'

import requests

url = "https://api.zivio.net/api/v4/projects/{id}/cancel"

payload = {
    "reason_code_id": 12,
    "custom_reason": "The requirement has been withdrawn by the budget owner.",
    "cancellation_reason_id": 3,
    "cancellation_other_reason": "Duplicate of an existing engagement."
}
headers = {
    "Authorization": "Bearer <token>",
    "zivio-tenant-id": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {
    Authorization: 'Bearer <token>',
    'zivio-tenant-id': '<api-key>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    reason_code_id: 12,
    custom_reason: 'The requirement has been withdrawn by the budget owner.',
    cancellation_reason_id: 3,
    cancellation_other_reason: 'Duplicate of an existing engagement.'
  })
};

fetch('https://api.zivio.net/api/v4/projects/{id}/cancel', 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.zivio.net/api/v4/projects/{id}/cancel",
  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([
    'reason_code_id' => 12,
    'custom_reason' => 'The requirement has been withdrawn by the budget owner.',
    'cancellation_reason_id' => 3,
    'cancellation_other_reason' => 'Duplicate of an existing engagement.'
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json",
    "zivio-tenant-id: <api-key>"
  ],
]);

$response = curl_exec($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.zivio.net/api/v4/projects/{id}/cancel"

	payload := strings.NewReader("{\n  \"reason_code_id\": 12,\n  \"custom_reason\": \"The requirement has been withdrawn by the budget owner.\",\n  \"cancellation_reason_id\": 3,\n  \"cancellation_other_reason\": \"Duplicate of an existing engagement.\"\n}")

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

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("zivio-tenant-id", "<api-key>")
	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.zivio.net/api/v4/projects/{id}/cancel")
  .header("Authorization", "Bearer <token>")
  .header("zivio-tenant-id", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"reason_code_id\": 12,\n  \"custom_reason\": \"The requirement has been withdrawn by the budget owner.\",\n  \"cancellation_reason_id\": 3,\n  \"cancellation_other_reason\": \"Duplicate of an existing engagement.\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.zivio.net/api/v4/projects/{id}/cancel")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["zivio-tenant-id"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"reason_code_id\": 12,\n  \"custom_reason\": \"The requirement has been withdrawn by the budget owner.\",\n  \"cancellation_reason_id\": 3,\n  \"cancellation_other_reason\": \"Duplicate of an existing engagement.\"\n}"

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

{
  "project_id": 123,
  "project_title": "Website Redesign",
  "state": "cancelled",
  "changed": true,
  "message": "Project 123 cancelled",
  "eliminated_proposals": 2
}

{
  "error": "invalid_token",
  "error_description": "The access token provided is expired, revoked, malformed, or invalid for other reasons"
}

{
  "error": "insufficient_scope",
  "error_description": "The request requires higher privileges than provided by the access token",
  "required_scope": "projects:write",
  "provided_scopes": [
    "welcome:read"
  ]
}

{
  "error": "reason_required",
  "message": "Please provide a reason for cancellation (reason_code_id is required)",
  "reason_codes": [
    {
      "id": 12,
      "label": "Requirement withdrawn"
    }
  ]
}