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38 lines
1.6 KiB
Plaintext
38 lines
1.6 KiB
Plaintext
---
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title: LangSmith
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slug: /integrations-langsmith
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---
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LangSmith is a full-lifecycle DevOps service from LangChain that provides monitoring and observability. To integrate with Langflow, add your LangChain API key and configuration as Langflow environment variables, and then start Langflow.
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1. Obtain your LangChain API key from [https://smith.langchain.com](https://smith.langchain.com/)
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2. Set the following environment variables in your Langflow `.env` file, replacing `LANGCHAIN_API_KEY` and `LANGSMITH_PROJECT_NAME` with your own values:
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```text
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LANGSMITH_TRACING=True
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LANGSMITH_ENDPOINT=https://api.smith.langchain.com/
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LANGSMITH_API_KEY=LANGCHAIN_API_KEY
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LANGSMITH_PROJECT=LANGSMITH_PROJECT_NAME
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```
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Alternatively, you can export the environment variables in your terminal instead of adding them to the `.env` file:
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```bash
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export LANGSMITH_TRACING=True && export LANGSMITH_ENDPOINT="https://api.smith.langchain.com/" && export LANGSMITH_API_KEY="LANGCHAIN_API_KEY" && export LANGSMITH_PROJECT="LANGSMITH_PROJECT_NAME"
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```
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3. Restart Langflow with your modified `.env` file or from the terminal where you set your environment variables:
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```bash
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langflow run --env-file .env
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```
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If you set the environment variables in your terminal, you can omit `--env-file`.
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However, Langflow can source environment variables from `.env` _and_ your terminal.
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For more information, see [Langflow environment variables](/environment-variables).
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4. Run a flow in Langflow to generate some activity.
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5. View the LangSmith dashboard for monitoring and observability.
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