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Validate Node

Validates input data against a JSON schema and branches valid/invalid.

Config vs inputs (code-grounded)​

  • config.schema: required JSON Schema object
  • inputs.value: value to validate (often expression-based)

Outputs/branches​

  • Uses matched_output.
  • valid when schema validation passes.
  • invalid when validation fails, usually with error details.

Example usage snippet​

{
  "id": "n_validate",
  "type": "validate_node",
  "inputs": {
    "value": "{{ $json['http_trigger'].request.body }}"
  },
  "config": {
    "schema": {
      "type": "object",
      "required": ["email"],
      "properties": {
        "email": { "type": "string" }
      }
    }
  }
}

Common pitfalls​

  • Putting value under config.input; runtime reads inputs.value.
  • Forgetting to handle invalid branch with user-friendly response.
  • Using permissive schemas that do not enforce required fields.