Trigger broadcast send

Transition a draft broadcast with recipients into sending status.

Requirements:

• Broadcast must be in draft status
• Broadcast must have at least one recipient

The broadcast job is enqueued server-side and processes asynchronously. Use GET /whatsapp_broadcasts/ to poll progress.

POST /whatsapp_broadcasts/{broadcast_id}/send

Trigger broadcast send

cURL

curl --request POST \
  --url https://app.kapso.ai/api/v1/whatsapp_broadcasts/{broadcast_id}/send \
  --header 'X-API-Key: <api-key>'

import requests

url = "https://app.kapso.ai/api/v1/whatsapp_broadcasts/{broadcast_id}/send"

headers = {"X-API-Key": "<api-key>"}

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

print(response.text)

const options = {method: 'POST', headers: {'X-API-Key': '<api-key>'}};

fetch('https://app.kapso.ai/api/v1/whatsapp_broadcasts/{broadcast_id}/send', 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.kapso.ai/api/v1/whatsapp_broadcasts/{broadcast_id}/send",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_HTTPHEADER => [
    "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"
	"net/http"
	"io"
)

func main() {

	url := "https://app.kapso.ai/api/v1/whatsapp_broadcasts/{broadcast_id}/send"

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

	req.Header.Add("X-API-Key", "<api-key>")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://app.kapso.ai/api/v1/whatsapp_broadcasts/{broadcast_id}/send")
  .header("X-API-Key", "<api-key>")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://app.kapso.ai/api/v1/whatsapp_broadcasts/{broadcast_id}/send")

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

request = Net::HTTP::Post.new(url)
request["X-API-Key"] = '<api-key>'

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

202

accepted

{
  "data": {
    "id": "5f6a7b8c-9d0e-1f2a-3b4c-5d6e7f8a9b0c",
    "status": "sending",
    "started_at": "2025-10-12T17:03:21Z"
  }
}

Authorizations

X-API-Key · string · header · required

Your project API key

Path Parameters

broadcast_id · string<uuid> · required

Response

202

application/json

Broadcast send triggered successfully

data · object

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