> ## 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.

# Sentry

> Application error tracking and performance monitoring

## Overview

Connect Sentry to give TierZero access to your application errors, issues, and performance data. TierZero queries Sentry during investigations to identify error patterns, track issue frequency, and correlate errors with deployments.

## Prerequisites

* Administrative access to your Sentry organization
* Permission to create internal integrations or auth tokens

## Setup Instructions

### Step 1: Navigate to Integration Settings

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

### Step 2: Authorize Sentry

1. Click **Connect to Sentry**
2. You'll be redirected to Sentry to authorize TierZero
3. Select the Sentry organization to connect
4. Review permissions and click **Allow**
5. You'll be redirected back to TierZero

## What TierZero Accesses

* **Issues**: Error groups, frequency, and affected users
* **Events**: Individual error occurrences and stack traces
* **Projects**: Project listings and configuration
* **Tags**: Issue tags for filtering and correlation

## Integration Resources

After connecting Sentry, TierZero uses these resource catalogs:

* **projects.json**: List of Sentry projects
* **issues\_tags.json**: Tags used for issue categorization

## Security

* TierZero uses Sentry's OAuth 2.0 authorization flow
* Read-only access to errors and project data
* Tokens are encrypted at rest
* Revoke access from Sentry's **Settings → Integrations → Custom Integrations**

## Troubleshooting

### Issues Not Visible

* Verify TierZero has access to the correct Sentry organization
* Check that the connected token has not expired
* Ensure the projects contain data for the queried time range