# Penny: Hermes Agent plugin

> Penny core memory and private notes for Hermes.

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

Penny core memory and private notes for Hermes.

## Good to know before installing

Automatic recall sends the first 4,000 characters of each nontrivial local prompt to app.mypenny.ai as a search query, and the agent can save notes there through penny_remember without a Hermes approval prompt; works only in local CLI/TUI conversations (cron, subagents and gateways are refused); login is a manual command that registers its own OAuth client with clerk.mypenny.ai and briefly listens on 127.0.0.1 for the callback; tokens are kept in <HERMES_HOME>/penny/auth.json (owner-only) and are not removed on uninstall; no raw transcript upload, telemetry or other-client credential reuse.

From the plugin's catalog listing.

## How to install

1. Install it. Hermes asks for any API keys it needs, then asks whether to turn it on.

```bash
hermes plugins install penny
```

2. Said no? Turn it on later:

```bash
hermes plugins enable penny
```

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: Memory & notes
- Maintained by: HelperLabs (Community)
- Needs: No API keys declared
- Works on: linux, macos
- Requires Hermes: `>=0.21.6`
- Version: 0.1.0
- In the catalog since: 2026-10-10

## Links

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

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HermesWatcher is an independent guide. It is not affiliated with or endorsed by Nous Research. The [official Hermes Agent documentation](https://hermes-agent.nousresearch.com/docs) and [repository](https://github.com/NousResearch/hermes-agent) from Nous Research are the authority; each page here lists the official sources it was written from. If this site and the official docs disagree, trust the official docs. Index for agents: https://hermeswatcher.com/llms.txt