# Hermes Proton: Hermes Agent plugin

> Proton Mail, Calendar, Contacts and Drive for a Hermes Agent, through an MIT-licensed client built from Proton's own open-source Go libraries (go-srp, go-proton-api) — no Proton Bridge and no paid plan.

Canonical: https://hermeswatcher.com/plugins/hermes-proton  
Tier: Community  
Official page (Nous Research): https://hermes-agent.nousresearch.com/docs/plugins/hermes-proton  
Last updated in catalog: 2026-10-25

Proton Mail, Calendar, Contacts and Drive for a Hermes Agent, through an MIT-licensed client built from Proton's own open-source Go libraries (go-srp, go-proton-api) — no Proton Bridge and no paid plan. Reads, searches and sends mail (attachments, scheduled send, labels, folders), manages calendar events and RSVPs, contacts (signed/encrypted vCards), and Drive (upload, download, move, rename, trash, public share links). Sign-in runs in a terminal via `hermes proton login` and the account password is never taken through chat; sending is refused until a recipient allowlist is set and every send is gated by Hermes's pre_tool_call approval.

## Good to know before installing

Talks to Proton's private, undocumented web API over the network; stores a per-account session file (0600) holding OAuth-style tokens and the derived key passphrase (never the password) under the profile's plugin-data folder, and on first load copies any sessions from the standalone client's `~/.config/protonlite` into it; reads local files you approve for attachments and Drive uploads and writes downloaded attachments and Drive files under that plugin-data folder; shells out to gpg for calendar/Drive key provisioning; `proton_schedule_followup` creates one-shot Hermes cron jobs (read-only Proton toolset) that run unattended and deliver to your home channel; no self-update, no downloaded binaries, no telemetry.

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 hermes-proton
```

2. Said no? Turn it on later:

```bash
hermes plugins enable hermes-proton
```

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: Work & business
- Maintained by: Maytrella007 (Community)
- Needs: No API keys declared
- Adds tools: `proton_login`, `proton_accounts`, `proton_unread`, `proton_list`, `proton_read`, `proton_send`, `proton_draft`, `proton_mark`, `proton_delete`, `proton_get_attachment`, `proton_search`, `proton_gather_context`, `proton_labels`, `proton_calendar`, `proton_contacts`, `proton_contact`, `proton_drive_list`, `proton_drive_download`, `proton_drive_create_folder`, `proton_drive_upload`, `proton_drive_move`, `proton_drive_rename`, `proton_drive_delete`, `proton_drive_share`
- Works on: linux, macos
- Requires Hermes: `>=0.22.0`
- Version: 0.28.0
- In the catalog since: 2026-10-25

## Links

- [Full setup and settings (official page)](https://hermes-agent.nousresearch.com/docs/plugins/hermes-proton)
- [Source code](https://github.com/Maytrella007/hermes-proton#readme)
- [All plugins](https://hermeswatcher.com/plugins.md)

---

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