Throw Error

The Throw Error node stops workflow execution immediately and returns an error response with a custom HTTP status code. Use it for validation failures, unauthorized access, or other error conditions.

Overview

Property	Value
Inputs	1
Outputs	0
Output	Workflow stops; error response returned to caller

Parameters

Parameter	Type	Description
label	string	Node identifier (camelCase)
errorMessage	expression	Error message (supports expressions)
httpStatusCode	number	HTTP status code (e.g. 400, 401, 403, 404, 429, 500)

Common Status Codes

Code	Use case
400	Bad Request (invalid input)
401	Unauthorized (authentication required)
403	Forbidden (access denied)
404	Not Found (resource missing)
422	Unprocessable Entity (validation error)
429	Too Many Requests (rate limit)
500	Internal Server Error

Example

{
  "type": "throwError",
  "data": {
    "label": "validationError",
    "errorMessage": "Text input is required",
    "httpStatusCode": 400
  }
}

Use with Condition to validate input and throw only when invalid:

• Condition true → continue to Output
• Condition false → Throw Error

Related

• Node Types – Overview of all node types
• Condition Node – Validate before throwing
• Error Handler – Catch errors from other nodes