> ## 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.

# LangSmith

> LLM development and monitoring platform by LangChain

## Overview

Connect LangSmith to give TierZero visibility into your LLM application performance. TierZero uses LangSmith data to monitor AI/ML pipeline health, trace requests, and debug model issues.

## Prerequisites

* Access to your LangSmith account
* 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 LangSmith

### Step 2: Enter Credentials

1. In LangSmith, go to **Settings → API Keys**
2. Create a new API key
3. Copy the API key
4. Paste it into TierZero and click **Connect**

## What TierZero Accesses

* **Traces**: LLM request traces and spans
* **Runs**: Individual LLM invocations and chain runs
* **Feedback**: User feedback and evaluation data
* **Projects**: Project listings and metadata

## Security

* TierZero uses API key authentication
* Read-only access
* Keys are encrypted at rest
* Revoke by deleting the API key in LangSmith

## Troubleshooting

### Missing Traces

* Verify the API key has access to the project containing the traces
* Check that tracing is enabled in your LangSmith application