Check the existence of the Flow tasks.flow.Flow.isExists

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: task

Who can execute the method: any user

The method tasks.flow.Flow.isExists checks whether a flow with the specified name exists. If an id is provided, it checks for flows with the same name, excluding the specified one.

Method Parameters

Required parameters are marked with *

Name `type`	Description
flowData* `object`	Object containing data to check the existence of the flow
name* `string`	The name of the flow to check
id `integer`	The identifier of the flow to exclude from the check (optional). You can obtain the identifier using the method to create a new flow tasks.flow.Flow.create or by retrieving a task tasks.task.get for a task from the flow

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" \
        -d '{
            "flowData": {
                "name": "Flow Name"
            }
        }' \
        https://your-domain.bitrix24.com/rest/_USER_ID_/_CODE_/tasks.flow.Flow.isExists

curl -X POST \
        -H "Content-Type: application/json" \
        -H "Authorization: Bearer YOUR_ACCESS_TOKEN" \
        -d '{
            "flowData": {
                "name": "Flow Name"
            }
        }' \
        https://your-domain.bitrix24.com/rest/tasks.flow.Flow.isExists

try
        {
        	const response = await $b24.callMethod(
        		'tasks.flow.Flow.isExists',
        		{
        			flowData: {
        				name: 'Flow Name'
        			}
        		}
        	);
        	
        	const result = response.getData().result;
        	console.info(result);
        }
        catch( error )
        {
        	console.error(error);
        }

try {
            $response = $b24Service
                ->core
                ->call(
                    'tasks.flow.Flow.isExists',
                    [
                        'flowData' => [
                            'name' => 'Flow Name'
                        ]
                    ]
                );
        
            $result = $response
                ->getResponseData()
                ->getResult();
        
            if ($result->error()) {
                echo 'Error: ' . $result->error();
            } else {
                echo 'Info: ' . print_r($result->data(), true);
            }
        
        } catch (Throwable $e) {
            error_log($e->getMessage());
            echo 'Error checking flow existence: ' . $e->getMessage();
        }

BX24.callMethod(
            'tasks.flow.Flow.isExists',
            {
                flowData: {
                    name: 'Flow Name'
                }
            },
            function(result) {
                if (result.error()) {
                    console.error(result.error());
                } else {
                    console.info(result.data());
                }
            }
        );

require_once('crest.php'); // connecting CRest PHP SDK
        
        $flowData = [
            "name" => "Flow Name"
        ];
        
        // executing the request to the REST API
        $result = CRest::call(
            'tasks.flow.Flow.isExists',
            [
                'flowData' => $flowData
            ]
        );
        
        // Processing the response from Bitrix24
        if ($result['error']) {
            echo 'Error: '.$result['error_description'];
        } else {
            print_r($result['result']);
        }

Response Handling

HTTP status: 200

{
            "result": {
                "exists": true
            }
        }

Returned Data

Name `type`	Description
result `object`	Object containing the result of the operation
exists `boolean`	Indicates whether a flow with the specified name exists

Error Handling

HTTP status: 400

{
            "error": "0",
            "error_description": "Flow not found"
        }

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	Additional Information
`0`	Access denied or flow not found	The account plan does not allow working with flows or the user does not have permission to perform the check
`0`	`Unknown error`	An unknown error occurred

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

Delete Flow

Enable or disable Flow

Check the existence of the Flow tasks.flow.Flow.isExists

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

Continue LearningContinue Learning