curl --request POST \
  --url https://www.chatbase.co/api/v2/agents/{agentId}/helpdesk/tickets/{ticketNumber}/messages \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "type": "reply",
  "content": "Thanks for reaching out. This is **fixed** now.",
  "authorId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "authorEmail": "sam@example.com"
}
'

import requests

url = "https://www.chatbase.co/api/v2/agents/{agentId}/helpdesk/tickets/{ticketNumber}/messages"

payload = {
    "type": "reply",
    "content": "Thanks for reaching out. This is **fixed** now.",
    "authorId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "authorEmail": "sam@example.com"
}
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({
    type: 'reply',
    content: 'Thanks for reaching out. This is **fixed** now.',
    authorId: '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    authorEmail: 'sam@example.com'
  })
};

fetch('https://www.chatbase.co/api/v2/agents/{agentId}/helpdesk/tickets/{ticketNumber}/messages', 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://www.chatbase.co/api/v2/agents/{agentId}/helpdesk/tickets/{ticketNumber}/messages",
  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([
    'type' => 'reply',
    'content' => 'Thanks for reaching out. This is **fixed** now.',
    'authorId' => '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    'authorEmail' => 'sam@example.com'
  ]),
  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://www.chatbase.co/api/v2/agents/{agentId}/helpdesk/tickets/{ticketNumber}/messages"

	payload := strings.NewReader("{\n  \"type\": \"reply\",\n  \"content\": \"Thanks for reaching out. This is **fixed** now.\",\n  \"authorId\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"authorEmail\": \"sam@example.com\"\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://www.chatbase.co/api/v2/agents/{agentId}/helpdesk/tickets/{ticketNumber}/messages")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"type\": \"reply\",\n  \"content\": \"Thanks for reaching out. This is **fixed** now.\",\n  \"authorId\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"authorEmail\": \"sam@example.com\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://www.chatbase.co/api/v2/agents/{agentId}/helpdesk/tickets/{ticketNumber}/messages")

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  \"type\": \"reply\",\n  \"content\": \"Thanks for reaching out. This is **fixed** now.\",\n  \"authorId\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"authorEmail\": \"sam@example.com\"\n}"

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

{
  "id": "<string>",
  "type": "reply",
  "sender": {
    "type": "customer",
    "id": "<string>",
    "name": "<string>",
    "email": "<string>"
  },
  "content": "<string>",
  "contentText": "<string>",
  "createdAt": "2026-07-29T09:00:00.000Z"
}

{
  "error": {
    "code": "VALIDATION_INVALID_BODY",
    "message": "Invalid request"
  }
}

{
  "error": {
    "code": "AUTH_MISSING_API_KEY",
    "message": "Authentication required"
  }
}

{
  "error": {
    "code": "SUBSCRIPTION_API_RESTRICTED_PLAN",
    "message": "A Standard plan or higher is required to access the API"
  }
}

{
  "error": {
    "code": "TICKET_NOT_FOUND",
    "message": "The requested ticket could not be found"
  }
}

{
  "error": {
    "code": "CONVERSATION_NOT_TAKEN_OVER",
    "message": "The linked conversation is not taken over"
  }
}

{
  "error": {
    "code": "TEAM_MEMBER_NOT_FOUND",
    "message": "No team member matches the provided author"
  }
}

{
  "error": {
    "code": "RATE_LIMIT_TOO_MANY_REQUESTS",
    "message": "Too many requests, please try again later"
  }
}

{
  "error": {
    "code": "INTERNAL_SERVER_ERROR",
    "message": "Something went wrong, please try again"
  }
}

{
  "error": {
    "code": "SERVICE_UNDER_MAINTENANCE",
    "message": "The API is temporarily unavailable for scheduled maintenance, please try again later"
  }
}