Send Message im.message.add

If you are developing integrations for Bitrix24 using AI tools (Codex, Claude Code, Cursor), connect to the MCP server so that the assistant can utilize the official REST documentation.

Scope: im

Who can execute the method: a user with permission to send messages in chat

The method im.message.add sends a message to a chat.

Method Parameters

Required parameters are marked with *

Name `type`	Description
DIALOG_ID* `string`	Identifier of the chat in the format: `chatXXX` — chat `sgXXX` — group or project chat `XXX` — identifier of the personal chat user The chat identifier can be obtained using the im.chat.get method. The user identifier can be obtained using the user.get and user.search methods
MESSAGE* `string`	The text of the message. Required if `ATTACH` is not provided. Formatting is supported
ATTACH `object` `string`	Attachment with content blocks: images, links, files. Required if `MESSAGE` is not provided. Read more in the Attachments section
KEYBOARD `object` `string`	Buttons under the message that the user can interact with. Read more in the Working with Keyboards article
MENU `object` `string`	Additional items in the chat's context menu. Read more in the Context Menu article
SYSTEM `string`	Indicator of a system message. Allowed values: `Y` — system message `N` — regular message Default is `N`
URL_PREVIEW `string`	Conversion of links into rich links. Allowed values: `Y` — enabled `N` — disabled Default is `Y`
REPLY_ID `integer`	Identifier of the message to which the reply is sent. The message for the reply must be in the same chat. The identifier can be obtained using the im.dialog.messages.get method

Code Examples

How to Use Examples in Documentation

cURL (Webhook)

cURL (OAuth)

PHP

BX24.js

PHP CRest

curl -X POST \
        -H "Content-Type: application/json" \
        -H "Accept: application/json" \
        -d '{"DIALOG_ID":"chat2941","MESSAGE":"Message text","SYSTEM":"N","URL_PREVIEW":"Y","REPLY_ID":34237}' \
        https://**put_your_bitrix24_address**/rest/**put_your_user_id_here**/**put_your_webhook_here**/im.message.add

curl -X POST \
        -H "Content-Type: application/json" \
        -H "Accept: application/json" \
        -d '{"DIALOG_ID":"chat2941","MESSAGE":"Message text","SYSTEM":"N","URL_PREVIEW":"Y","REPLY_ID":34237,"auth":"**put_access_token_here**"}' \
        https://**put_your_bitrix24_address**/rest/im.message.add

try
        {
            const response = await $b24.callMethod(
                'im.message.add',
                {
                    DIALOG_ID: 'chat2941',
                    MESSAGE: 'Message text',
                    SYSTEM: 'N',
                    URL_PREVIEW: 'Y',
                    REPLY_ID: 34237
                }
            );
            
            const result = response.getData().result;
            console.log('Created message with ID:', result);
            processResult(result);
        }
        catch( error )
        {
            console.error('Error:', error);
        }

try {
            $response = $b24Service
                ->core
                ->call(
                    'im.message.add',
                    [
                        'DIALOG_ID' => 'chat2941',
                        'MESSAGE' => 'Message text',
                        'SYSTEM' => 'N',
                        'URL_PREVIEW' => 'Y',
                        'REPLY_ID' => 34237
                    ]
                );
        
            $result = $response
                ->getResponseData()
                ->getResult();
        
            echo 'Success: ' . print_r($result, true);
            processData($result);
        
        } catch (Throwable $e) {
            error_log($e->getMessage());
            echo 'Error adding message: ' . $e->getMessage();
        }

BX24.callMethod(
            'im.message.add',
            {
                DIALOG_ID: 'chat2941',
                MESSAGE: 'Message text',
                SYSTEM: 'N',
                URL_PREVIEW: 'Y',
                REPLY_ID: 34237
            },
            function(result)
            {
                if (result.error())
                    console.error(result.error());
                else
                    console.log(result.data());
            }
        );

require_once('crest.php');
        
        $result = CRest::call(
            'im.message.add',
            [
                'DIALOG_ID' => 'chat2941',
                'MESSAGE' => 'Message text',
                'SYSTEM' => 'N',
                'URL_PREVIEW' => 'Y',
                'REPLY_ID' => 34237
            ]
        );
        
        echo '<PRE>';
        print_r($result);
        echo '</PRE>';

Response Handling

HTTP Status: 200

{
            "result": 34239,
            "time": {
                "start": 1772552939,
                "finish": 1772552939.091396,
                "duration": 0.09139609336853027,
                "processing": 0,
                "date_start": "2026-03-03T17:48:59+01:00",
                "date_finish": "2026-03-03T17:48:59+01:00",
                "operating_reset_at": 1772553539,
                "operating": 0
            }
        }

Returned Data

Name `type`	Description
result `integer`	Identifier of the sent message
time `time`	Information about the request execution time

Error Handling

HTTP Status: 400

{
            "error": "MESSAGE_EMPTY",
            "error_description": "Message can't be empty"
        }

Name `type`	Description
error `string`	String error code. It may consist of digits, Latin letters, and underscores
error_description `error_description`	Textual description of the error. The description is not intended to be shown to the end user in its raw form

Possible Error Codes

Code	Description	Value
`MESSAGE_EMPTY`	Message can't be empty	Empty `MESSAGE` and `ATTACH` not provided
`USER_ID_EMPTY`	User ID can't be empty	User identifier in `DIALOG_ID` is not provided or is invalid
`USER_NOT_FOUND`	User not found	User not found
`CHAT_ID`	Error creating message	Failed to create message. Ensure that a chat with such `ID` exists
`ACCESS_ERROR`	Action unavailable	Insufficient permissions to send the message
`PARAMS_ERROR`	Incorrect params	Invalid set of request parameters
`ATTACH_ERROR`	Incorrect attach params	Invalid `ATTACH` object
`ATTACH_OVERSIZE`	You have exceeded the maximum allowable size of attach	The size of `ATTACH` exceeds the allowable limit
`KEYBOARD_ERROR`	Incorrect keyboard params	Invalid `KEYBOARD` object
`MENU_ERROR`	Incorrect menu params	Invalid `MENU` object
`REPLY_ACCESS_ERROR`	Action unavailable	No access to the message in `REPLY_ID`
`REPLY_FROM_OTHER_CHAT_ERROR`	You can only reply to a message within the same chat	Cannot reply to a message from another chat

Statuses and System Error Codes

HTTP Status: 20x, 40x, 50x

The errors described below may occur when calling any method.

Status	Code Error Message	Description
`500`	`INTERNAL_SERVER_ERROR` Internal server error	An internal server error has occurred. Please contact the server administrator or Bitrix24 technical support
`500`	`ERROR_UNEXPECTED_ANSWER` Server returned an unexpected response	An internal server error has occurred. Please contact the server administrator or Bitrix24 technical support
`503`	`QUERY_LIMIT_EXCEEDED` Too many requests	The request intensity limit has been exceeded
`405`	`ERROR_BATCH_METHOD_NOT_ALLOWED` Method is not allowed for batch usage	The current method is not permitted for calls using batch
`400`	`ERROR_BATCH_LENGTH_EXCEEDED` Max batch length exceeded	The maximum length of parameters passed to the batch method has been exceeded
`401`	`NO_AUTH_FOUND` Wrong authorization data	Invalid access token or webhook code
`400`	`INVALID_REQUEST` Https required	The HTTPS protocol is required for method calls
`503`	`OVERLOAD_LIMIT` REST API is blocked due to overload	The REST API is blocked due to overload. This is a manual individual block; please contact Bitrix24 technical support to lift it
`403`	`ACCESS_DENIED` REST API is available only on commercial plans	The REST API is only available on commercial plans
`403`	`INVALID_CREDENTIALS` Invalid request credentials	The user associated with the access token or webhook used to call the method lacks the necessary permissions
`404`	`ERROR_MANIFEST_IS_NOT_AVAILABLE` Manifest is not available	The manifest is not available
`403`	`insufficient_scope` The request requires higher privileges than provided by the webhook token	The request requires higher privileges than those provided by the webhook token
`401`	`expired_token` The access token provided has expired	The provided access token has expired
`403`	`user_access_error` The user does not have access to the application	The user does not have access to the application. This means that the application is installed, but the portal administrator has restricted access to this application to specific users only
`500`	`PORTAL_DELETED` Portal was deleted	The public part of the site is closed. To open the public part of the site on an on-premise installation, disable the "Temporary closure of the public part of the site" option. Path to the setting: Desktop > Settings > Product Settings > Module Settings > Main Module > Temporary closure of the public part of the site

Continue Learning

Working with Context Menu

Edit Sent Message

Send Message im.message.add

Method ParametersMethod Parameters

Code ExamplesCode Examples

Response HandlingResponse Handling

Returned DataReturned Data

Error HandlingError Handling

Possible Error CodesPossible Error Codes

Statuses and System Error CodesStatuses and System Error Codes

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