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---
title: LangWatch
slug: /integrations-langwatch
---
[LangWatch](https://app.langwatch.ai/) is an all-in-one LLMOps platform for monitoring, observability, analytics, evaluations and alerting for getting user insights and improve your LLM workflows.
## Integrate LangWatch observability
To integrate with Langflow, add your LangWatch API key as a Langflow environment variable:
1. Get a LangWatch API key from your LangWatch account.
2. Add the key to your Langflow `.env` file:
```shell
LANGWATCH_API_KEY="API_KEY_STRING"
```
Alternatively, you can set the environment variable in your terminal session:
```shell
export LANGWATCH_API_KEY="API_KEY_STRING"
```
3. Restart Langflow with your `.env` file, if you modified the Langflow `.env`:
```
langflow run --env-file .env
```
4. Run a flow.
5. View the LangWatch dashboard for monitoring and observability.
![LangWatch dashboard](/img/langwatch-dashboard.png)
## Use the LangWatch Evaluator
In your flows, you can use the **LangWatch Evaluator** component to use LangWatch's evaluation endpoints to assess a model's performance.
This component is available in the **LangWatch** [bundle](/components-bundle-components).