Wasend

Set Group Subject

Update the subject (name) of a WhatsApp group.

Set Group Subject

This endpoint allows you to change the subject (often referred to as the name) of a WhatsApp group.

Endpoint

PUT /{sessionId}/groups/{groupId}/subject

Headers

NameTypeRequiredDescription
AuthorizationstringYesBearer token for authentication
Content-TypestringYesapplication/json

Path Parameters

ParameterTypeRequiredDescription
sessionIdstringYesThe session ID
groupIdstringYesThe group ID

Request Body

Refer to SubjectRequest in API.md.

FieldTypeRequiredDescription
subjectstringYesThe new subject for the group. Max 25 characters.

Response

Returns a SubjectResponse object. Refer to API.md.

{
  "success": true,
  "subject": "New Awesome Group Subject",
  "message": "Group subject updated successfully."
}

Examples

curl -X PUT "https://api.wasend.dev/YOUR_SESSION_ID/groups/YOUR_GROUP_ID/subject" \\
  -H "Authorization: Bearer YOUR_API_KEY" \\
  -H "Content-Type: application/json" \\
  -d '{
    "subject": "New Awesome Group Subject"
  }'
import { WasendClient, WasendConfig, SubjectRequest, SubjectResponse } from '@wasend/core'; // Adjust imports

const config = new WasendConfig({ apiKey: 'YOUR_API_KEY' });
const client = new WasendClient(config);

const sessionId = 'YOUR_SESSION_ID';
const groupId = 'YOUR_GROUP_ID';

async function setGroupSubjectExample() {
  const requestBody: SubjectRequest = {
    subject: "New Awesome Group Subject"
  };

  try {
    const response: SubjectResponse = await client.setGroupSubject(sessionId, groupId, requestBody);
    if (response.success) {
      console.log('Successfully set group subject:', response.subject);
      console.log(response.message);
    } else {
      console.error('Failed to set group subject:', response.error);
    }
  } catch (error) {
    console.error('Error setting group subject:', error);
  }
}

setGroupSubjectExample();
const { WasendClient, WasendConfig } = require('@wasend/core'); // Adjust imports

const config = new WasendConfig({ apiKey: 'YOUR_API_KEY' });
const client = new WasendClient(config);

const sessionId = 'YOUR_SESSION_ID';
const groupId = 'YOUR_GROUP_ID';

async function setGroupSubjectExample() {
  const requestBody = {
    subject: "New Awesome Group Subject"
  };

  try {
    const response = await client.setGroupSubject(sessionId, groupId, requestBody);
    if (response.success) {
      console.log('Successfully set group subject:', response.subject);
      console.log(response.message);
    } else {
      console.error('Failed to set group subject:', response.error);
    }
  } catch (error) {
    console.error('Error setting group subject:', error);
  }
}

setGroupSubjectExample();
from wasend_sdk import WasendClient, WasendConfig # Adjust imports

config = WasendConfig(api_key='YOUR_API_KEY')
client = WasendClient(config)

session_id = 'YOUR_SESSION_ID'
group_id = 'YOUR_GROUP_ID'

request_body = {
    'subject': "New Awesome Group Subject"
}

try:
    response = client.set_group_subject(session_id=session_id, group_id=group_id, request=request_body)
    if response.success:
        print(f"Successfully set group subject: {response.subject}")
        print(response.message)
    else:
        print(f"Failed to set group subject: {response.error}")
except Exception as e:
    print(f"Error setting group subject: {e}")
package main

import (
	"fmt"
	"log"

	"github.com/wasenddev/wasend-sdk-go/wasendcore" // Correct import path
)

func main() {
	config := &wasendcore.WasendConfig{
		ApiKey: "YOUR_API_KEY",
	}
	client := wasendcore.NewWasendClient(config)

	sessionId := "YOUR_SESSION_ID"
	groupId := "YOUR_GROUP_ID"

	requestBody := &wasendcore.SubjectRequest{
		Subject: "New Awesome Group Subject",
	}

	response, err := client.SetGroupSubject(sessionId, groupId, requestBody) // Assumes method exists
	if err != nil {
		log.Fatalf("Error setting group subject: %v", err)
	}

	if response.Success {
		fmt.Printf("Successfully set group subject: %s\\n", response.Subject)
		fmt.Println(response.Message)
	} else {
		fmt.Printf("Failed to set group subject: %s\\n", response.Error)
	}
}
using System;
using Wasend.Core; // Adjust imports for WasendConfig, SubjectRequest, SubjectResponse

public class SetGroupSubjectExample
{
    public static void Main(string[] args)
    {
        var config = new WasendConfig { ApiKey = "YOUR_API_KEY" };
        var client = new WasendClient(config);

        var sessionId = "YOUR_SESSION_ID";
        var groupId = "YOUR_GROUP_ID";

        var requestBody = new SubjectRequest
        {
            Subject = "New Awesome Group Subject"
        };

        try
        {
            var response = client.SetGroupSubject(sessionId, groupId, requestBody);
            if (response.Success)
            {
                Console.WriteLine($"Successfully set group subject: {response.Subject}");
                Console.WriteLine(response.Message);
            }
            else
            {
                Console.WriteLine($"Failed to set group subject: {response.Error}");
            }
        }
        catch (Exception ex)
        {
            Console.WriteLine($"Error setting group subject: {ex.Message}");
        }
    }
}
import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.net.http.HttpRequest.BodyPublishers;

public class SetGroupSubjectHttp {
    public static void main(String[] args) {
        String sessionId = "YOUR_SESSION_ID";
        String groupId = "YOUR_GROUP_ID";
        String apiKey = "YOUR_API_KEY";
        String baseUrl = "https://api.wasend.dev";

        String requestPayload = "{\"subject\": \"New Awesome Group Subject\"}";

        HttpClient client = HttpClient.newHttpClient();
        HttpRequest request = HttpRequest.newBuilder()
                .uri(URI.create(baseUrl + "/" + sessionId + "/groups/" + groupId + "/subject"))
                .header("Authorization", "Bearer " + apiKey)
                .header("Content-Type", "application/json")
                .PUT(BodyPublishers.ofString(requestPayload))
                .build();

        try {
            HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
            System.out.println("Response status: " + response.statusCode());
            System.out.println("Response body: " + response.body());
            // Parse JSON response
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}
<?php
$sessionId = 'YOUR_SESSION_ID';
$groupId = 'YOUR_GROUP_ID';
$apiKey = 'YOUR_API_KEY';
$baseUrl = 'https://api.wasend.dev';

$payload = json_encode([
    'subject' => 'New Awesome Group Subject'
]);

$ch = curl_init($baseUrl . '/' . $sessionId . '/groups/' . $groupId . '/subject');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "PUT");
curl_setopt($ch, CURLOPT_POSTFIELDS, $payload);
curl_setopt($ch, CURLOPT_HTTPHEADER, [
    'Authorization: Bearer ' . $apiKey,
    'Content-Type: application/json'
]);

$response = curl_exec($ch);
$httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);

echo "HTTP status: " . $httpCode . "\\n";
echo "Response: " . $response . "\\n";
// Parse JSON response
?>
require 'net/http'
require 'uri'
require 'json'

session_id = 'YOUR_SESSION_ID'
group_id = 'YOUR_GROUP_ID'
api_key = 'YOUR_API_KEY'
base_url = 'https://api.wasend.dev'

uri = URI("#{base_url}/#{session_id}/groups/#{group_id}/subject")
http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = (uri.scheme == 'https')

request = Net::HTTP::Put.new(uri.path, {
  'Authorization' => "Bearer #{api_key}",
  'Content-Type' => 'application/json'
})
request.body = {
  subject: "New Awesome Group Subject"
}.to_json

response_data = http.request(request)

puts "Response status: #{response_data.code}"
puts "Response body: #{response_data.body}"
# Parse JSON response
import Foundation

#if canImport(FoundationNetworking)
import FoundationNetworking
#endif

let sessionId = "YOUR_SESSION_ID"
let groupId = "YOUR_GROUP_ID"
let apiKey = "YOUR_API_KEY"
let baseUrl = "https://api.wasend.dev"

guard let url = URL(string: "\(baseUrl)/\(sessionId)/groups/\(groupId)/subject") else {
    print("Invalid URL")
    exit(1)
}

var request = URLRequest(url: url)
request.httpMethod = "PUT"
request.setValue("Bearer \(apiKey)", forHTTPHeaderField: "Authorization")
request.setValue("application/json", forHTTPHeaderField: "Content-Type")

let payload: [String: Any] = [
    "subject": "New Awesome Group Subject"
]

do {
    request.httpBody = try JSONSerialization.data(withJSONObject: payload, options: [])
} catch {
    print("Error serializing JSON: \(error)")
    exit(1)
}

let task = URLSession.shared.dataTask(with: request) { data, response, error in
    if let error = error {
        print("Error: \(error)")
        return
    }
    guard let httpResponse = response as? HTTPURLResponse else {
        print("Invalid response")
        return
    }
    print("Response status code: \(httpResponse.statusCode)")
    if let data = data, let responseBody = String(data: data, encoding: .utf8) {
        print("Response body: \(responseBody)")
        // Parse JSON response
    }
    #if os(macOS) || os(Linux)
    CFRunLoopStop(CFRunLoopGetCurrent())
    #endif
}

task.resume()

#if os(macOS) || os(Linux)
CFRunLoopRun()
#endif
use reqwest::Client;
use serde_json::json;
use tokio;

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let session_id = "YOUR_SESSION_ID";
    let group_id = "YOUR_GROUP_ID";
    let api_key = "YOUR_API_KEY";
    let base_url = "https://api.wasend.dev";
    let client = Client::new();

    let payload = json!({
        "subject": "New Awesome Group Subject"
    });

    let response = client.put(format!("{}/{}/groups/{}/subject", base_url, session_id, group_id))
        .bearer_auth(api_key)
        .json(&payload)
        .send()
        .await?;

    println!("Status: {}", response.status());
    let body = response.text().await?;
    println!("Body: {}", body);
    // Parse JSON response

    Ok(())
}

Response Fields

FieldTypeDescription
successbooleanWhether the operation was successful.
subjectstringThe updated group subject.
messagestringA confirmation message.
errorstringOptional. Error message if the request fails.

Error Codes

CodeDescription
400Bad Request - Invalid parameters (e.g., missing subject, subject too long/short).
401Unauthorized - Invalid or missing API key.
403Forbidden - User is not an admin or group settings prevent changes.
404Not Found - Session or group not found.
429Too Many Requests - Rate limit exceeded.
500Internal Server Error.

Notes

  • The group subject (name) has a maximum length, typically 25 characters, enforced by WhatsApp. The API may also enforce this or a similar limit.
  • Only group administrators can usually change the group subject, unless group settings (infoAdminOnly) allow all participants.
  • All group members will be notified of the subject change if successful.
  • Emojis and special characters can often be used in group subjects.
  • This endpoint is functionally similar to set-name.mdx if that also updates the group subject. Ensure consistency in usage and terminology based on API.md.