<h1 align="center">Proton Drive CLI MCP</h1>

<p align="center"> Manage Proton Drive from Claude, Codex, VS Code/Copilot, and any MCP client through Proton's official CLI. Authentication and encrypted Drive behavior stay with Proton's tooling. </p>

<p align="center"> <a href="#install">Install</a> | <a href="#first-run">First Run</a> | <a href="#what-agents-can-do">Tools</a> | <a href="#safety-model">Safety</a> | <a href="docs/TOOLS.md">Tool Reference</a> | <a href="https://github.com/borealstack/proton-drive-cli-mcp/releases/latest">Latest Release</a> </p>

---

Why This Exists

AI agents can already run shell commands, but Drive operations should not depend on prompt-crafted command lines. This server exposes Proton Drive as typed MCP tools while delegating the sensitive parts to Proton's official proton-drive CLI.

| What you get | How it works | | --- | --- | | Proton-supported Drive behavior | Calls the official Proton Drive CLI instead of reimplementing auth or encrypted Drive APIs. | | Structured MCP tools | Agents can list, upload, download, share, trash, and inspect Drive paths through schemas. | | Safer mutation flow | Destructive or account-changing tools require confirm: true. | | Low-friction setup | Runs from npm with npx, and can install the official CLI into a managed user-local directory with SHA-512 verification. | | Lower normal token use | Folder lists and background job status responses are bounded by default; full files still use upload/download or text helpers. |

[!NOTE] This project is an independent interoperability wrapper. It is not affiliated with Proton AG.

Install

Add the server to an MCP client as a local stdio server:

{
  "mcpServers": {
    "proton-drive": {
      "command": "npx",
      "args": ["-y", "@borealstack/proton-drive-cli-mcp"],
      "env": {}
    }
  }
}

The command is a stdio server. If you run it directly in a terminal, no prompt or banner is expected; it waits for MCP JSON-RPC messages on stdin.

Client Shortcuts

| Client | Setup | | --- | --- | | Claude Code | claude mcp add --transport stdio proton-drive -- npx -y @borealstack/proton-drive-cli-mcp | | Claude Desktop | Use the JSON config above, or install the MCPB bundle. | | Codex | Use the plugin metadata in plugins/proton-drive-cli-mcp. | | VS Code | code --add-mcp "{\"name\":\"proton-drive\",\"command\":\"npx\",\"args\":[\"-y\",\"@borealstack/proton-drive-cli-mcp\"]}" | | npm | npx -y @borealstack/proton-drive-cli-mcp |

First Run

Start with diagnosis. The server will report whether the official CLI is found, whether the managed install path exists, which version is available, and whether the CLI can access /my-files.

Call proton_drive_diagnose

If the CLI is missing, run setup:

Call proton_drive_setup with installIfMissing=true

If authentication is missing, start the browser login flow:

Call proton_drive_auth_login
Finish Proton sign-in in the browser
Call proton_drive_diagnose again

[!TIP] The server does not request or store Proton credentials. Login, session storage, and encrypted Drive behavior remain delegated to Proton's official CLI.

Requirements

Node.js 22+ for the published package.
Bun 1.3+ for repository development and Bun test coverage.
The official Proton Drive CLI, or network access to Proton's CLI download

index for managed install.

Browser access for the official Proton login flow.

The CLI is resolved in this order:

PROTON_DRIVE_CLI_PATH
The managed user-local install path
proton-drive or proton-drive.exe in the current directory or common download paths
proton-drive on PATH
Managed install from Proton's CLI download index

Useful environment switches:

| Variable | Effect | | --- | --- | | PROTON_DRIVE_CLI_PATH | Use an explicit Proton Drive CLI binary. | | PROTON_DRIVE_CLI_AUTO_INSTALL=0 | Disable managed CLI installation. | | PROTON_DRIVE_CLI_INSTALL_DIR | Override the managed install directory. | | PROTON_DRIVE_CLI_MANAGE_PATH=0 | Skip managed PATH updates. | | PROTON_DRIVE_AUTH_STATUS_CACHE_MS | Tune successful auth-status caching. | | PROTON_DRIVE_VERSION_CACHE_MS | Tune CLI version caching. |

What Agents Can Do

| Area | Tools | | --- | --- | | Setup and auth | proton_drive_diagnose, proton_drive_setup, proton_drive_auth_status, proton_drive_auth_login, proton_drive_auth_login_status, proton_drive_auth_login_cancel, proton_drive_auth_logout | | CLI metadata | proton_drive_cli_install, proton_drive_cli_version, proton_drive_cli_help | | Files | proton_drive_list, proton_drive_info, proton_drive_create_folder, proton_drive_upload, proton_drive_download | | Long-running work | proton_drive_list_async, proton_drive_upload_async, proton_drive_download_async, proton_drive_job_status, proton_drive_job_cancel | | Small text files | proton_drive_read_text, proton_drive_write_text | | Mutations | proton_drive_rename, proton_drive_copy, proton_drive_move, proton_drive_trash, proton_drive_restore, proton_drive_delete, proton_drive_empty_trash | | Sharing | proton_drive_sharing_status, proton_drive_sharing_invite, proton_drive_sharing_remove, proton_drive_sharing_set_url, proton_drive_sharing_remove_url | | Invitations | proton_drive_invitation_list, proton_drive_invitation_accept, proton_drive_invitation_reject |

Full schemas and examples are in docs/TOOLS.md.

Common Agent Workflows

List the top 20 items in /my-files/Reports.

Uses proton_drive_list with bounded output and pagination metadata.

Upload these local files to /my-files/Reports, then poll until done.

Uses proton_drive_upload_async followed by proton_drive_job_status.

Read /my-files/Notes/todo.txt, update the text, and write it back.

Uses proton_drive_read_text and proton_drive_write_text for small UTF-8 files. Full binary or large-file work should use proton_drive_download and proton_drive_upload.

Safety Model

This project is designed so the MCP layer can orchestrate Drive work without becoming a credential broker.

| Guardrail | Behavior | | --- | --- | | Credential handling | Proton login and session storage stay inside the official CLI. | | Destructive actions | Delete, empty trash, logout, sharing removal, and invitation decisions require confirm: true. | | Public-link passwords | Custom passwords are not exposed through MCP arguments because CLI arguments can be visible to local process inspection. | | Output size | List tools are bounded; background JSON output is summarized with byte counts and truncation metadata. | | Provenance | npm publishes with provenance; release assets include checksums and Sigstore-backed attestations. |

[!IMPORTANT] proton_drive_delete and proton_drive_empty_trash are permanent operations. Prefer proton_drive_trash first unless the user explicitly asks to delete.

Release Channels

| Channel | Artifact | | --- | --- | | npm | @borealstack/proton-drive-cli-mcp | | GitHub release | latest release assets | | MCP Registry manifest | server.json | | Claude Desktop | proton-drive-cli-mcp.mcpb | | Codex plugin | plugins/proton-drive-cli-mcp |

Release assets include:

npm package tarball
MCPB bundle
SHA256SUMS
Sigstore JSON attestation bundle

Develop Locally

bun install
bun run typecheck
bun test
bun run build
npm test

Run the development server through Bun:

{
  "mcpServers": {
    "proton-drive-dev": {
      "command": "bun",
      "args": ["run", "<path-to-repo>/src/index.ts"],
      "env": {}
    }
  }
}

Run real-account smoke checks only when you intentionally want to touch a logged-in Proton Drive account. Keep generated smoke artifacts local and out of git.

Project Map

| Path | Purpose | | --- | --- | | src/index.ts | stdio MCP server entry point | | src/server.ts | MCP tool registration surface | | src/cli.ts | shared Proton Drive CLI behavior | | src/installer.ts | managed official CLI download and checksum verification | | docs/TOOLS.md | tool inputs, outputs, and examples | | server.json | MCP Registry metadata | | mcpb/manifest.json | Claude MCPB metadata | | plugins/proton-drive-cli-mcp | Codex plugin package |

References

Help Discovery

If this project helps you connect Proton Drive to an MCP client, star the repository so other users can find the maintained official-CLI wrapper: borealstack/proton-drive-cli-mcp.

Proton Drive CLI MCP

Why This Exists

Install

Client Shortcuts

First Run

Requirements

What Agents Can Do

Common Agent Workflows

Safety Model

Release Channels

Develop Locally

Project Map

References

Help Discovery

Score

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Proton Drive CLI MCP FAQ

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