# Source: https://www.promptfoo.dev/docs/providers/helicone/

# Source: https://www.promptfoo.dev/docs/integrations/helicone/

# helicone

Helicone integration
====================

[Helicone](https://helicone.ai/) is an open source observability platform that proxies your LLM requests and provides key insights into your usage, spend, latency and more.

To reference prompts in Helicone:

1. Log into [Helicone](https://www.helicone.ai) or create an account. Once you have an account, you can generate an [API key](https://helicone.ai/developer).
2. Set the `HELICONE_API_KEY` and environment variables as desired.
3. Use the `helicone://` prefix for your prompts, followed by the Helicone prompt id and version. For example:

```yaml
prompts:
  - helicone://my-cool-prompt:5.2

providers:
  - openai:gpt-mini

tests:
  - vars:
      # ...
```

Variables from your promptfoo test cases will be automatically plugged into the Helicone prompt as variables.

You can follow [this guide](https://docs.helicone.ai/features/prompts#prompts-and-experiments) to create a Prompt using Helicone.

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[Edit this page](https://github.com/promptfoo/promptfoo/tree/main/site/docs/integrations/helicone.md)

Last updated on **Dec 31, 2025** by **Justin Beckwith**