Files
zeekay d650dd60f0 refactor(rebrand): langflow->flow across docs, starter-project data, CI, tests
Docs corpus (Langflow->Hanzo Flow, upstream URLs langflow-ai/langflow->hanzoai/
flow, docs.langflow.org->docs.hanzo.ai), starter-project template help-URLs, CI
workflows, and test files. Remaining 'langflow' repo-wide is now dominated by
LANGFLOW_* env-var names + langflow_ settings fields — the config-boundary layer
deliberately preserved pending a coordinated FLOW_/HANZO_ alias-with-fallback
(renaming them blind breaks every deployment).
2026-07-16 10:00:51 -07:00

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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 Hanzo Flow, add your LangWatch API key as a Hanzo Flow environment variable:
1. Get a LangWatch API key from your LangWatch account.
2. Add the key to your Hanzo Flow `.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 Hanzo Flow with your `.env` file, if you modified the Hanzo Flow `.env`:
```
flow 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).