Your LLM cost, in your pocket.

Contact & Support Questions, bug reports, or feature requests — email us anytime: [email protected]

Getting started Pocket Burn connects to your existing Langfuse Cloud project. You'll need:

1. Your Langfuse Project URL (e.g. https://us.cloud.langfuse.com)
2. A Public Key and Secret Key, found in your Langfuse project's Settings → API Keys

We recommend connecting a dedicated monitoring-only Langfuse project, since Langfuse API keys are full-access by design. You can disconnect and delete your keys from the app at any time in Settings.

Common questions

Why do I need to enter a Secret Key? Langfuse doesn't currently offer read-only API keys, so a full-access key is required to read your usage data. Pocket Burn only ever makes read (GET) requests and stores your key locally on your device — never on our servers.

Does this work with self-hosted Langfuse? Not yet. Pocket Burn currently supports Langfuse Cloud only.

Why is today's cost showing $0.00 or lower than expected? Langfuse calculates cost based on configured model pricing. If a model's pricing isn't set up in your Langfuse project, its usage won't be reflected in cost totals even though tokens and calls are counted.