# LLMonitor

>[LLMonitor](https://llmonitor.com?utm_source=langchain&utm_medium=py&utm_campaign=docs) is an open-source observability platform that provides cost and usage analytics, user tracking, tracing and evaluation tools.

## Installation and Setup

Create an account on [llmonitor.com](https://llmonitor.com?utm_source=langchain&utm_medium=py&utm_campaign=docs), then copy your new app's `tracking id`.

Once you have it, set it as an environment variable by running:

```bash
export LLMONITOR_APP_ID="..."
```


## Callbacks

See a [usage example](/docs/integrations/callbacks/llmonitor).

```python
from langchain.callbacks import LLMonitorCallbackHandler
```