# Guardrails - Workflow node | Docs - nodulz

Source: https://nodulz.com/docs/nodes/ai_guardrails

Language: en

Filter unsafe input or output

## Usage and specifics

Output contains allowed, text and violations. Invalid regular expressions count as violations. LLM moderation needs an AI credential; explicitly branch downstream on allowed.

Technical type : `ai_guardrails`. Runtime : `nodulz`.

## Credentials and prerequisites

- [Create and configure the credential : ai-model](/docs/credentials/ai-model)

Create credentials in your nodulz instance’s Credentials area, then select them on the node. Availability depends on ownership and sharing. See the [credentials guide](/docs/credentials) for access and rotation.

## Parameters

Names below are technical keys. Defaults are not a ready-to-run configuration: complete fields required by your operation. Paths containing [] describe list items; some fields depend on the selected mode.

| Parameter | Type | Default | Values / limits |
| --- | --- | --- | --- |
| `mode` | `enum` | `"input"` | `input`, `output` |
| `source` | `string` | `""` | - |
| `blockPatterns` | `array` | `[]` | - |
| `useLlmModeration` | `boolean` | `false` | - |
| `credentialId` | `string` | - | - |
| `model` | `string` | `""` | - |

## Initial configuration

Initial catalog configuration example, to adapt before running. Keep secrets in credentials.

```json
{
  "mode": "input",
  "source": "",
  "blockPatterns": [],
  "useLlmModeration": false,
  "model": ""
}
```

## Verification

Test with representative data. Check node output in the inspector and logs, then use editor mapping for downstream fields. A trigger test with a simulated payload does not validate external service delivery.

See also : [Expressions and data](/docs/expressions), [Executions](/docs/executions), [Node catalog](/docs/nodes).

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- [Features - nodulz](https://nodulz.com/product/overview)
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