curl --request PATCH \
  --url https://api.lehar.ai/ca/api/v0/campaigns/{campaign_id} \
  --header 'Content-Type: application/json' \
  --header 'X-API-KEY: <api-key>' \
  --data '
{
  "name": "March renewals (v2)",
  "schedule": {
    "max_attempts": 4
  }
}
'

import requests

url = "https://api.lehar.ai/ca/api/v0/campaigns/{campaign_id}"

payload = {
    "name": "March renewals (v2)",
    "schedule": { "max_attempts": 4 }
}
headers = {
    "X-API-KEY": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'PATCH',
  headers: {'X-API-KEY': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({name: 'March renewals (v2)', schedule: {max_attempts: 4}})
};

fetch('https://api.lehar.ai/ca/api/v0/campaigns/{campaign_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://api.lehar.ai/ca/api/v0/campaigns/{campaign_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([
    'name' => 'March renewals (v2)',
    'schedule' => [
        'max_attempts' => 4
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "X-API-KEY: <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.lehar.ai/ca/api/v0/campaigns/{campaign_id}"

	payload := strings.NewReader("{\n  \"name\": \"March renewals (v2)\",\n  \"schedule\": {\n    \"max_attempts\": 4\n  }\n}")

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

	req.Header.Add("X-API-KEY", "<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.patch("https://api.lehar.ai/ca/api/v0/campaigns/{campaign_id}")
  .header("X-API-KEY", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"name\": \"March renewals (v2)\",\n  \"schedule\": {\n    \"max_attempts\": 4\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.lehar.ai/ca/api/v0/campaigns/{campaign_id}")

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

request = Net::HTTP::Patch.new(url)
request["X-API-KEY"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"name\": \"March renewals (v2)\",\n  \"schedule\": {\n    \"max_attempts\": 4\n  }\n}"

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

{
  "id": "campaign_01EXAMPLE",
  "customer_id": "customer_01EXAMPLE",
  "created_by_user_id": "user_01EXAMPLE",
  "voice_agent_id": "agent_sales_hi",
  "whatsapp_agent_id": null,
  "from_phone_number_id": null,
  "whatsapp_sender_id": null,
  "name": "March renewals (v2)",
  "description": null,
  "campaign_type": "voice",
  "status": "draft",
  "timezone": "Asia/Kolkata",
  "schedule": {
    "business_hours": [
      {
        "days": [
          "mon",
          "tue",
          "wed",
          "thu",
          "fri"
        ],
        "start": "09:00",
        "end": "18:00"
      }
    ],
    "max_attempts": 4,
    "retry_delay_minutes": 120
  },
  "workflow": {},
  "variables_schema": {},
  "metadata": {},
  "temporal_workflow_id": null,
  "temporal_run_id": null,
  "cloned_from_campaign_id": null,
  "started_at": null,
  "completed_at": null,
  "created_at": "2026-05-22T10:00:00Z",
  "updated_at": "2026-05-22T10:20:00Z"
}

{
  "error": {
    "code": "invalid_request",
    "message": "id and customer_id cannot be updated"
  }
}

{
  "error": {
    "code": "conflict",
    "message": "Only draft, scheduled, or paused campaigns can be edited"
  }
}