Is Protonmail Mcp Server safe to use?

Protonmail Mcp Server has no known CVEs as of the latest MCPpedia security scan. It does not require authentication, so any local process can connect — keep this in mind in shared environments. Licensed under MIT.

How do I install Protonmail Mcp Server?

Protonmail Mcp Server can be installed by cloning its GitHub repository and following the setup instructions in the README.

What AI clients work with Protonmail Mcp Server?

Protonmail Mcp Server is compatible with claude-desktop, cursor, claude-code. It uses stdio transport.

Is Protonmail Mcp Server actively maintained?

Protonmail Mcp Server is less actively maintained — last commit was 104 days ago. It has 1 GitHub stars.

Protonmail Mcp Server

Name: Protonmail Mcp Server
Author: TensorTemplar

by TensorTemplar

MCP server for protonmail written in rust

1 0 tools GitHub

No known CVEs

MIT license

Maintained

Last commit 104d ago

Works with most clients

Transport: stdio

0 tools

Grade F

Edit this pageView history

Communication Security

Step 1

Install in your client

Config is the same across clients — only the file and path differ.

Supported in Claude Desktopstdio · Node 18+

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "protonmail-mcp-server": {
      "command": "<see-readme>",
      "args": []
    }
  }
}

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Read me

What Protonmail Mcp Server does

Unofficial IMAP-backed MCP (Model Context Protocol) server for ProtonMail Bridge. Exposes mailbox operations as MCP tools so AI assistants can list, search, and retrieve mail through a local Bridge connection.

Test This Server

No automated test available for this server. Check the GitHub README for setup instructions.

Loading README…

Scored, not listed

Why this score

Five weighted categories — click any category to see the underlying evidence.

Score breakdown

31/100across 5 weighted dimensions

How we score →

0255075100

−69

Security

Maintenance

Efficiency

Documentation

Compatibility

Categoriesclick a row to see evidence

Security

OSV.dev

No known CVEs.

No package registry to scan.

Community

Reviews

Be the first to review

Have you used this server?

Share your experience — it helps other developers decide.

How easy was setup?Did it work reliably?How was the documentation?

Frequently Asked Questions

Is Protonmail Mcp Server safe to use?: Protonmail Mcp Server has no known CVEs as of the latest MCPpedia security scan. It does not require authentication, so any local process can connect — keep this in mind in shared environments. Licensed under MIT.
How do I install Protonmail Mcp Server?: Protonmail Mcp Server can be installed by cloning its GitHub repository and following the setup instructions in the README.
What AI clients work with Protonmail Mcp Server?: Protonmail Mcp Server is compatible with claude-desktop, cursor, claude-code. It uses stdio transport.
Is Protonmail Mcp Server actively maintained?: Protonmail Mcp Server is less actively maintained — last commit was 104 days ago. It has 1 GitHub stars.

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MCP Security Weekly

Get CVE alerts and security updates for Protonmail Mcp Server and similar servers.

Community

Discussion

Start a conversation

Ask a question, share a tip, or report an issue.

Has anyone used this with Cursor?How do you handle auth?Any alternatives?

Edit this pageView history

Communication Security

Step 1

Install in your client

Config is the same across clients — only the file and path differ.

Supported in Claude Desktopstdio · Node 18+

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "protonmail-mcp-server": {
      "command": "<see-readme>",
      "args": []
    }
  }
}

Are you the author?

Add this badge to your README to show your security score and help users find safe servers.

Embed in your READMEAbout badges →

[![MCPpedia Score](https://mcppedia.org/api/badge/protonmail-mcp-server)](https://mcppedia.org/s/protonmail-mcp-server)

Read me

What Protonmail Mcp Server does

Test This Server

No automated test available for this server. Check the GitHub README for setup instructions.

README

ProtonMail MCP Server

News

v2026.2.2 - Breaking Change

search_emails renamed to get_inbox_items - The old search_emails tool (which listed emails with optional date filtering) has been renamed to get_inbox_items to better reflect its purpose.

New search_emails with keyword search - A new search_emails tool now provides actual keyword-based searching with field selection:

{
  "mailbox": "INBOX",
  "query": "meeting notes",
  "fields": ["subject", "from"],
  "since_date": "2025-01-01T00:00:00Z",
  "limit": 30
}

Parameter	Required	Description
`query`	Yes	Search keywords
`fields`	No	Fields to search: `text` (anywhere), `subject`, `from`, `to`, `body`. Defaults to `text`.
`since_date`	No	ISO 8601 date filter
`mailbox`	No	Defaults to `INBOX`
`limit`	No	Defaults to 30

Quickstart

Install

Prebuilt binaries (recommended):

Linux:

curl -LO https://github.com/TensorTemplar/protonmail-mcp-server/releases/latest/download/protonmail-mcp-server-x86_64-unknown-linux-gnu.tar.gz
tar xzf protonmail-mcp-server-x86_64-unknown-linux-gnu.tar.gz
chmod +x protonmail-mcp-server
sudo mv protonmail-mcp-server /usr/local/bin/

macOS (Apple Silicon):

curl -LO https://github.com/TensorTemplar/protonmail-mcp-server/releases/latest/download/protonmail-mcp-server-aarch64-apple-darwin.tar.gz
tar xzf protonmail-mcp-server-aarch64-apple-darwin.tar.gz
chmod +x protonmail-mcp-server
sudo mv protonmail-mcp-server /usr/local/bin/

macOS (Intel):

curl -LO https://github.com/TensorTemplar/protonmail-mcp-server/releases/latest/download/protonmail-mcp-server-x86_64-apple-darwin.tar.gz
tar xzf protonmail-mcp-server-x86_64-apple-darwin.tar.gz
chmod +x protonmail-mcp-server
sudo mv protonmail-mcp-server /usr/local/bin/

Windows (PowerShell):

Invoke-WebRequest -Uri "https://github.com/TensorTemplar/protonmail-mcp-server/releases/latest/download/protonmail-mcp-server.exe-x86_64-pc-windows-msvc.zip" -OutFile "protonmail-mcp-server.zip"
Expand-Archive protonmail-mcp-server.zip -DestinationPath .

Via cargo:

# From crates.io
cargo install protonmail-mcp-server --features http

# Or from source
git clone https://github.com/TensorTemplar/protonmail-mcp-server
cd protonmail-mcp-server
cargo install --path . --features http

Verify Downloads (Optional)

All release binaries include SHA256 checksums signed with Sigstore.

Checksum verification:

# Download the checksums file
curl -LO https://github.com/TensorTemplar/protonmail-mcp-server/releases/latest/download/SHA256SUMS.txt

# Verify your downloaded binary (run in same directory as the .tar.gz/.zip)
sha256sum -c SHA256SUMS.txt --ignore-missing
# Expected output: protonmail-mcp-server-x86_64-unknown-linux-gnu.tar.gz: OK

Signature verification (requires cosign):

# Download the signature bundle
curl -LO https://github.com/TensorTemplar/protonmail-mcp-server/releases/latest/download/SHA256SUMS.txt.bundle

# Verify the checksums file was signed by this repo's GitHub Actions
cosign verify-blob \
  --certificate-identity-regexp "github.com/TensorTemplar/protonmail-mcp-server" \
  --certificate-oidc-issuer https://token.actions.githubusercontent.com \
  --bundle SHA256SUMS.txt.bundle \
  SHA256SUMS.txt
# Expected output: Verified OK

Configure and Run

# Set environment variables
export IMAP_HOST=127.0.0.1
export IMAP_PORT=1143
export IMAP_USERNAME=your@email.com
export IMAP_PASSWORD=your-bridge-password
export MCP_TRANSPORT=http
export MCP_AUTH_TOKEN=your-secret-token

# Run
protonmail-mcp-server

Or cop

... View full README on GitHub

Loading README…

Scored, not listed

Why this score

Five weighted categories — click any category to see the underlying evidence.

Score breakdown

31/100across 5 weighted dimensions

How we score →

0255075100

−69

Security

Maintenance

Efficiency

Documentation

Compatibility

Categoriesclick a row to see evidence

Security

OSV.dev

No known CVEs.

No package registry to scan.

Community

Reviews

Be the first to review

Have you used this server?

Share your experience — it helps other developers decide.

How easy was setup?Did it work reliably?How was the documentation?

Frequently Asked Questions

Is Protonmail Mcp Server safe to use?: Protonmail Mcp Server has no known CVEs as of the latest MCPpedia security scan. It does not require authentication, so any local process can connect — keep this in mind in shared environments. Licensed under MIT.
How do I install Protonmail Mcp Server?: Protonmail Mcp Server can be installed by cloning its GitHub repository and following the setup instructions in the README.
What AI clients work with Protonmail Mcp Server?: Protonmail Mcp Server is compatible with claude-desktop, cursor, claude-code. It uses stdio transport.
Is Protonmail Mcp Server actively maintained?: Protonmail Mcp Server is less actively maintained — last commit was 104 days ago. It has 1 GitHub stars.