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Integrate Opik with Langflow

Opik is an open-source platform designed for evaluating, testing, and monitoring large language model (LLM) applications. Developed by Comet, it aims to facilitate more intuitive collaboration, testing, and monitoring of LLM-based applications.

This guide walks you through how to configure Langflow to collect tracing data about your flow executions and automatically send the data to Opik.

Prerequisites​

  • A project in Langflow with a runnable flow
  • An Open-Source Opik server or an Opik Cloud account - You can learn more about the differences here
  • If you are using Opik Cloud, you will also need your Opik API key

Set your Opik configuration as environment variables​

Call the CLI opik configure to save your Opik configuration in the same environment where you run Langflow.


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opik configure

For self-hosted Opik, you can also configure it using the Opik CLI by running the following command:


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opik configure --use_local

See the Opik documentation for more ways to configure Opik SDKs.

Start Langflow and run a flow​

  1. Start Langflow in the same terminal or environment where you set the environment variables:

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uv run langflow run

  1. In Langflow, open an existing project, and then run a flow.

  2. Navigate to your Opik project dashboard and view the collected tracing data.

Disable the Opik integration​

To disable the Opik integration, remove the environment variables you set in the previous steps and restart Langflow.

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