curl --request POST \
  --url https://api.impellabs.tech/api/v1/partner/tenants/{external_ref}/messages/send/ \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "to": "+15550100101",
  "channel": "whatsapp",
  "type": "template",
  "template_name": "appointment_reminder",
  "lang": "en_US",
  "body_params": [
    "Sam",
    "3 pm"
  ]
}
'

import requests

url = "https://api.impellabs.tech/api/v1/partner/tenants/{external_ref}/messages/send/"

payload = {
    "to": "+15550100101",
    "channel": "whatsapp",
    "type": "template",
    "template_name": "appointment_reminder",
    "lang": "en_US",
    "body_params": ["Sam", "3 pm"]
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    to: '+15550100101',
    channel: 'whatsapp',
    type: 'template',
    template_name: 'appointment_reminder',
    lang: 'en_US',
    body_params: ['Sam', '3 pm']
  })
};

fetch('https://api.impellabs.tech/api/v1/partner/tenants/{external_ref}/messages/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://api.impellabs.tech/api/v1/partner/tenants/{external_ref}/messages/send/",
  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([
    'to' => '+15550100101',
    'channel' => 'whatsapp',
    'type' => 'template',
    'template_name' => 'appointment_reminder',
    'lang' => 'en_US',
    'body_params' => [
        'Sam',
        '3 pm'
    ]
  ]),
  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://api.impellabs.tech/api/v1/partner/tenants/{external_ref}/messages/send/"

	payload := strings.NewReader("{\n  \"to\": \"+15550100101\",\n  \"channel\": \"whatsapp\",\n  \"type\": \"template\",\n  \"template_name\": \"appointment_reminder\",\n  \"lang\": \"en_US\",\n  \"body_params\": [\n    \"Sam\",\n    \"3 pm\"\n  ]\n}")

	req, _ := http.NewRequest("POST", 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.post("https://api.impellabs.tech/api/v1/partner/tenants/{external_ref}/messages/send/")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"to\": \"+15550100101\",\n  \"channel\": \"whatsapp\",\n  \"type\": \"template\",\n  \"template_name\": \"appointment_reminder\",\n  \"lang\": \"en_US\",\n  \"body_params\": [\n    \"Sam\",\n    \"3 pm\"\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.impellabs.tech/api/v1/partner/tenants/{external_ref}/messages/send/")

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  \"to\": \"+15550100101\",\n  \"channel\": \"whatsapp\",\n  \"type\": \"template\",\n  \"template_name\": \"appointment_reminder\",\n  \"lang\": \"en_US\",\n  \"body_params\": [\n    \"Sam\",\n    \"3 pm\"\n  ]\n}"

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

{
  "message": {
    "id": "9b3c1d5f-0000-4000-8000-000000000000",
    "object": "message",
    "role": "user",
    "type": "text",
    "text": "Hello",
    "created_at": "2026-01-15T10:04:00+00:00",
    "conversation": "5d2f7a3e-0000-4000-8000-000000000000",
    "channel": {
      "name": "whatsapp",
      "from": "+15550100101"
    }
  },
  "conversation": {
    "id": "5d2f7a3e-0000-4000-8000-000000000000",
    "object": "conversation",
    "status": "active",
    "agent": null,
    "agent_version": null,
    "channel": "whatsapp",
    "external_ref": null,
    "turns": 3,
    "metadata": {},
    "created_at": "2026-01-15T10:00:00+00:00",
    "updated_at": "2026-01-15T10:05:00+00:00",
    "contact": {
      "name": "Sam",
      "phone": "+15550100101",
      "lead_id": "8a1e0c7b-0000-4000-8000-000000000000"
    },
    "human_control": {
      "on": false,
      "reason": "",
      "since": "",
      "state": "ai",
      "pending_since": ""
    },
    "window": {
      "open": true,
      "last_inbound_at": "2026-01-15T10:04:00+00:00",
      "closes_at": "2026-01-16T10:04:00+00:00"
    },
    "capabilities": {
      "can_text": true,
      "can_template": true,
      "can_media": true,
      "window_open": true,
      "window": {
        "open": true
      },
      "tags": []
    },
    "whatsapp_number": "100000000000001"
  }
}

{
  "detail": "<string>",
  "code": "<string>",
  "field": "<string>",
  "error": {
    "code": "<string>",
    "message": "<string>"
  }
}