# OpenRouter Spend: Hermes Agent plugin

> OpenRouter API-key spend and recorded chat costs in USD/INR.

Canonical: https://hermeswatcher.com/plugins/openrouter-spend  
Tier: Community  
Official page (Nous Research): https://hermes-agent.nousresearch.com/docs/plugins/openrouter-spend  
Last updated in catalog: 2026-10-08

OpenRouter API-key spend and recorded chat costs in USD/INR.

## Good to know before installing

Sends the configured OpenRouter key (OPENROUTER_API_KEY, or the variable named in api_key_env) only to openrouter.ai's read-only key and generation accounting endpoints, and fetches public USD/INR rates from api.frankfurter.dev unless a manual rate is set; middleware on every LLM request records ids, model, token counts and reported cost (no prompt or reply text) to its own ledger; the dashboard reads accounting metadata (session ids, token counts, billing provider) read-only from the state.db and OpenRouter Spend ledger of every profile under the Hermes root.

From the plugin's catalog listing.

## How to install

1. Install it. Hermes asks for any API keys it needs (this one needs `OPENROUTER_API_KEY`), then asks whether to turn it on.

```bash
hermes plugins install openrouter-spend
```

2. Said no? Turn it on later:

```bash
hermes plugins enable openrouter-spend
```

3. Restart Hermes so it loads the plugin.

Some plugins also need a sign-in or settings: see the official page. Memory plugins ask whether to become your memory provider instead. Steps follow the official plugins guide: https://hermes-agent.nousresearch.com/docs/user-guide/features/plugins

## Facts

- Category: Cost, speed & monitoring, Hermes Desktop add-ons
- Maintained by: AllenRobinHubert (Community)
- Needs: `OPENROUTER_API_KEY` (API key)
- Requires Hermes: `>=0.21.5`
- Version: 0.4.1
- In the catalog since: 2026-10-08

## Links

- [Full setup and settings (official page)](https://hermes-agent.nousresearch.com/docs/plugins/openrouter-spend)
- [Source code](https://github.com/AllenRobinHubert/openrouter-spend#readme)
- [All plugins](https://hermeswatcher.com/plugins.md)

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