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

# Langfuse

> LLM observability and analytics platform

## Overview

Connect Langfuse to give TierZero visibility into your LLM application performance. TierZero uses Langfuse data to monitor AI/ML pipeline health, trace requests, and analyze model behavior during investigations.

## Prerequisites

* Access to your Langfuse instance
* Permission to create API keys

## Setup Instructions

### Step 1: Navigate to Integration Settings

1. Log into your TierZero dashboard
2. Go to **Settings → Integrations**
3. Click **Connect** next to Langfuse

### Step 2: Enter Credentials

1. In Langfuse, go to **Settings → API Keys**
2. Create a new API key with read access
3. Copy the public key and secret key
4. Enter your Langfuse host URL, public key, and secret key in TierZero
5. Click **Connect**

## What TierZero Accesses

* **Traces**: LLM request traces and spans
* **Scores**: Quality and evaluation scores
* **Sessions**: User session data
* **Metrics**: Latency, token usage, and cost data

## Security

* TierZero uses API key authentication
* Read-only access to traces and metrics
* Keys are encrypted at rest
* Revoke by deleting the API key in Langfuse

## Troubleshooting

### Connection Fails

* Verify the host URL is correct (include the protocol, e.g., `https://`)
* Check that the public and secret keys are entered correctly
* Ensure the Langfuse instance is accessible from TierZero