curl --request PATCH \
  --url https://app.famulor.io/api/v1/campaigns/{id} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data @- <<EOF
{
  "concurrency": 5,
  "voicemail_action": "drop_message",
  "voicemail_message": "Hi, we tried to reach you — we'll call again later."
}
EOF

import requests

url = "https://app.famulor.io/api/v1/campaigns/{id}"

payload = {
    "concurrency": 5,
    "voicemail_action": "drop_message",
    "voicemail_message": "Hi, we tried to reach you — we'll call again later."
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'PATCH',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    concurrency: 5,
    voicemail_action: 'drop_message',
    voicemail_message: 'Hi, we tried to reach you — we\'ll call again later.'
  })
};

fetch('https://app.famulor.io/api/v1/campaigns/{id}', 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://app.famulor.io/api/v1/campaigns/{id}",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "PATCH",
  CURLOPT_POSTFIELDS => json_encode([
    'concurrency' => 5,
    'voicemail_action' => 'drop_message',
    'voicemail_message' => 'Hi, we tried to reach you — we\'ll call again later.'
  ]),
  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://app.famulor.io/api/v1/campaigns/{id}"

	payload := strings.NewReader("{\n  \"concurrency\": 5,\n  \"voicemail_action\": \"drop_message\",\n  \"voicemail_message\": \"Hi, we tried to reach you — we'll call again later.\"\n}")

	req, _ := http.NewRequest("PATCH", 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.patch("https://app.famulor.io/api/v1/campaigns/{id}")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"concurrency\": 5,\n  \"voicemail_action\": \"drop_message\",\n  \"voicemail_message\": \"Hi, we tried to reach you — we'll call again later.\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://app.famulor.io/api/v1/campaigns/{id}")

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

request = Net::HTTP::Patch.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"concurrency\": 5,\n  \"voicemail_action\": \"drop_message\",\n  \"voicemail_message\": \"Hi, we tried to reach you — we'll call again later.\"\n}"

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

{
  "data": {
    "id": "ca1b2c3d-0000-4000-8000-000000000030",
    "name": "July outreach",
    "status": "draft",
    "assistant_id": "a1b2c3d4-0000-4000-8000-000000000001",
    "concurrency": 3,
    "retry_max": 2,
    "retry_delay_minutes": 60,
    "calling_windows": {
      "mon": [
        [
          "09:00",
          "20:00"
        ]
      ],
      "tue": [
        [
          "09:00",
          "20:00"
        ]
      ]
    },
    "timezone": "Europe/Berlin",
    "amd_enabled": true,
    "voicemail_action": "hangup",
    "voicemail_message": null,
    "started_at": null,
    "completed_at": null,
    "created_at": "2026-07-01T08:00:00Z",
    "updated_at": "2026-07-01T08:00:00Z"
  }
}

{
  "error": {
    "code": "invalid_request",
    "message": "\"to_number\" is required (E.164 format, e.g. +4930123456)."
  }
}

{
  "error": {
    "code": "unauthorized",
    "message": "Invalid API key."
  }
}

{
  "error": {
    "code": "forbidden",
    "message": "This API key is missing the required scope \"assistants:write\"."
  }
}

{
  "error": {
    "code": "not_found",
    "message": "Assistant not found"
  }
}