proton-pass-community-mcp is an MCP server for Proton Pass, with broad coverage of pass-cli operations.

It is an independent community project. It is not affiliated with or endorsed by Proton AG.

It is designed as a production-ready integration layer:

• typed tool inputs with zod
• stdio transport for MCP clients

Available Tools

The server exposes the following MCP tool surface:

| Tool | Purpose | | --------------------------------- | ------------------------------------------------ | | view_session_info | Session/account status from pass-cli info | | view_user_info | User account details from pass-cli user info | | check_status | Check user authentication status and CLI version | | inject | Inject secrets into template files | | run | Run commands with secret references resolved | | list_vaults | List vaults | | list_shares | List shares | | list_invites | List pending invitations | | view_settings | View current Proton Pass CLI settings | | list_vault_members | List members of a specific vault | | update_vault_member | Update a vault member role | | remove_vault_member | Remove a vault member | | list_items | List vault or share items, omitting contents | | search_items | Search items by title | | view_item | View item by URI or selectors | | create_vault | Create a vault | | update_vault | Update a vault name | | delete_vault | Delete a vault | | share_vault | Share a vault with a user | | transfer_vault | Transfer vault ownership | | create_login_item | Create a login item | | create_login_item_from_template | Create a login item from template payload | | create_note_item | Create a note item | | create_credit_card_item | Create a credit card item | | create_wifi_item | Create a WiFi item | | create_custom_item | Create a custom item from template payload | | create_identity_item | Create an identity item from template payload | | move_item | Move an item between vaults | | trash_item | Move an item to trash | | untrash_item | Restore an item from trash | | update_item | Update an item field set | | delete_item | Delete an item | | download_item_attachment | Download an item attachment | | list_item_members | List members of an item | | update_item_member | Update an item member role | | remove_item_member | Remove an item member | | create_item_alias | Create an alias item | | share_item | Share an item with a user | | generate_item_totp | Generate item TOTP codes | | generate_random_password | Generate a random password | | generate_passphrase | Generate a passphrase | | generate_totp | Generate TOTP from secret/URI | | score_password | Score password strength |

Coverage goal: provide comprehensive support for Proton Pass CLI workflows that fit MCP tool semantics. Intentionally excluded are CLI behaviors that are purely interactive or otherwise not a good fit for reliable MCP tool execution.

The search_items operation is additional functionality that is not provided by the base CLI.

Mutative tools currently require write gate opt-in (ALLOW_WRITE=1) and explicit per-call confirmation (confirm: true).

Proposed protocol-aligned confirmation policy (elicitation-first with fail-closed fallback) is documented in docs/TOOL_SCHEMA_PLAN.md.

Available Resources

The server also exposes static MCP resources for item-create template snapshots:

• pass://templates/item-create (catalog/index)
• pass://templates/item-create/login
• pass://templates/item-create/note
• pass://templates/item-create/credit-card
• pass://templates/item-create/wifi
• pass://templates/item-create/custom
• pass://templates/item-create/identity

Snapshot artifact source:

• docs/testing/item-create-templates.snapshot.json

These template resources are example well-formed payloads from pass-cli --get-template, not authoritative validation schemas.

Item Discovery Contract

list_items and search_items return token-efficient results. These operations do not contain the full contents or secrets of any items, thus preventing unnecessary leakage of sensitive data from the CLI to the host application or the LLM.

list_items and search_items both support MCP pagination:

• Input fields:
  • pageSize (optional, 1..250, default 100 for JSON output)
  • cursor (optional non-negative integer string offset, for example "100")
• Behavior:
  • Response includes items, pageSize, cursor, returned, total, and nextCursor.
  • Use nextCursor in a follow-up call to fetch the next page.

list_items also forwards filterType, filterState, and sortBy to pass-cli item list.

search_items semantics:

• title-only search (field: "title")
• matching modes: contains, prefix, exact
• optional caseSensitive

Requirements

[!NOTE] Currently, the server expects the user to handle authentication. If it's not able to authenticate, it will simply prompt the user to authenticate using one of the pass-cli methods.

• Node.js 24 (.nvmrc)
• pass-cli installed and authenticated
• MCP client capable of stdio transport

📌 Current Baseline Version of pass-cli used in development: v1.7.0

Run Locally

npm ci
npm run build
npm run dev

Install and Run via npm/npx

Install from npm or run directly with npx:

npm install --global proton-pass-community-mcp
proton-pass-community-mcp --allow-version-drift

or:

npx -y proton-pass-community-mcp --allow-version-drift

Release operations for maintainers are documented in docs/DEPLOYMENT.md.

Anonymized Demo Shell (Docker)

Use this when recording demos and you want a neutral workspace path in tooling metadata:

npm run demo:shell

This launches a container with the project mounted at /workspace/project.

To run a single command instead of an interactive shell:

npm run demo:shell -- npm run check

Notes:

• Shell prompt aliases/PS1 tweaks only change terminal display; they do not change real working-directory metadata emitted by tools.
• For true path anonymization in logs, run the host/tooling process from inside this containerized workspace.

MCP Client Configuration

Example MCP server config using npx package execution:

{
  "mcpServers": {
    "proton-pass-community-mcp": {
      "command": "npx",
      "args": ["-y", "proton-pass-community-mcp", "--allow-version-drift"]
    }
  }
}

If you are developing locally from source, use a direct local build path:

Example MCP server config using command-line args:

{
  "mcpServers": {
    "proton-pass-community-mcp": {
      "command": "node",
      "args": ["/absolute/path/to/proton-pass-community-mcp/dist/index.js", "--allow-version-drift"]
    }
  }
}

Example MCP server config using environment overrides:

{
  "mcpServers": {
    "proton-pass": {
      "command": "node",
      "args": ["/absolute/path/to/proton-pass-community-mcp/dist/index.js"],
      "env": {
        "PASS_CLI_BIN": "pass-cli",
        "PASS_CLI_ALLOW_VERSION_DRIFT": "true"
      }
    }
  }
}

Authentication Model

1. Authentication is user-managed outside MCP with pass-cli login.
2. On auth failure, tools return standardized AUTH_* errors and a retry instruction.
3. The MCP server does not collect credentials, OTP codes, or private keys.
4. Use check_status once as a session preflight (not per tool call); rely on AUTH_* fallback errors if the session later expires.
5. check_status compares your local CLI version against the development baseline and reports a version assessment for LLMs:
   • equal: exact semver match
   • compatible: semver differs but appears compatible by policy
   • possibly_incompatible: semver indicates potential drift, or version parsing/execution prevented a strict comparison
6. Version assessments are advisory. check_status is marked as an MCP error only when connectivity/authentication fails.
7. There is no MCP-specific API token auth layer in this server. Authentication methods are those supported by pass-cli in the server process environment.

Test Account Workflow

For disposable test-account usage in local development and CI (including account preflight checks and session isolation), see docs/testing/TEST_ACCOUNT_WORKFLOW.md.

Startup Flags

• --allow-version-drift: treat semver mismatch/version-parse uncertainty as compatible for check_status

Equivalent environment variable:

• PASS_CLI_ALLOW_VERSION_DRIFT=true|false (accepted truthy values: true, 1, yes, on; falsy: false, 0, no, off)
• If both are set, the CLI flag takes precedence.

Example:

npm run dev -- --allow-version-drift

Notes

• This is not an official Proton project.
• This project currently targets Proton Pass via pass-cli only.
• See ROADMAP.md for planned features.
• In addition to the MCP server, there is an agent skill file that is intended to be integrated with this MCP - however, it is currently only a draft.
• Developer runtime configuration and validation workflows are documented in CONTRIBUTING.md.
• Disposable account setup and contributor/CI guidance are documented in docs/testing/TEST_ACCOUNT_WORKFLOW.md.
• See CONTRIBUTING.md if you're interested in contributing to this project. Contributors are welcome.

LICENSE

GPL-3 © 2026 Really Him