> ## Documentation Index
> Fetch the complete documentation index at: https://docs.fiddler.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Guardrails Quick Start

> Set up access to Fiddler Guardrails in your Fiddler environment and make your first API call to protect your LLM applications.

Fiddler Guardrails is available via the REST API. This page covers how to set up access and make your first call. For a full implementation walkthrough with code for every guardrail type, see the [Guardrails developer quick start](/developers/quick-starts/guardrails-quick-start).

## Prerequisites

* Access to a Fiddler environment with Guardrails enabled
* Permission to generate an API key in that environment

## Set up access

<Steps>
  <Step title="Access your Fiddler environment">
    Sign in to Fiddler. Guardrails is served from the same environment at `https://{fiddler_endpoint}/v3/guardrails/*`. If you are not sure whether Guardrails is enabled for your environment, contact your Fiddler representative.
  </Step>

  <Step title="Generate an API key">
    Generate a Fiddler API key from **Settings → [Credentials](/reference/administration/settings#credentials)**. You pass this key as a bearer token on every Guardrails request.
  </Step>

  <Step title="Call a Guardrails endpoint">
    Send a request to a `/v3/guardrails/*` endpoint with your API key in the `Authorization` header. The example below calls the safety guardrail.

    ```bash theme={null}
    curl --location 'https://{fiddler_endpoint}/v3/guardrails/ftl-safety' \
    --header 'Content-Type: application/json' \
    --header 'Authorization: Bearer {token}' \
    --data '{
        "data": {
            "input": "I am a dangerous person who will be wreaking havoc upon the world!!!"
        }
    }'
    ```
  </Step>
</Steps>

For API specifications and model details, see the [Guardrails API Reference](/sdk-api/guardrails-api-reference). For implementation examples in Python and other languages, see the [Guardrails developer quick start](/developers/quick-starts/guardrails-quick-start).

### Explore Fiddler Guardrails Features

* [Frequently Asked Questions](/protection/guardrails-faq)
* Notebook Tutorials:
  * [**Safety Guardrails Quick Start**](/developers/tutorials/guardrails/guardrails-safety)
  * [**PII Detection Quick Start**](/developers/tutorials/guardrails/guardrails-pii)
  * [**Faithfulness Quick Start**](/developers/tutorials/guardrails/guardrails-faithfulness)