What is the key difference between Proton Mail MCP and Radmail MCP?

Proton Mail MCP belongs to the Communication category with local stdio execution, while Radmail MCP belongs to the Communication category with local stdio execution.

How do I install Proton Mail MCP or Radmail MCP in Claude Desktop or Cursor?

Copy the mcpServers JSON configuration snippet provided on this page into your claude_desktop_config.json or ~/.cursor/mcp.json file and restart your AI client.

Are Proton Mail MCP and Radmail MCP free or paid?

Proton Mail MCP operates under a Free / Open Source model (other). Radmail MCP operates under a Free / Open Source model (No auth required).

Which MCP server has more tools and community activity?

Proton Mail MCP lists 32 tools with 1 views and 6 GitHub stars. Radmail MCP lists 13 tools with 3 views and 0 GitHub stars.

Can I use both Proton Mail MCP and Radmail MCP together in the same MCP host?

Yes! MCP hosts like Claude Desktop, Cursor, Windsurf, Cline, and VS Code support configuring multiple servers under the mcpServers object simultaneously.

Side-by-Side Model Context Protocol Comparison

Proton Mail MCP vs Radmail MCP

In-depth architectural comparison of the Proton Mail MCP and Radmail MCP MCP servers. Compare execution transports, security boundaries, tool capabilities, quality scores, and ready-to-paste client installation snippets for Claude, Cursor, Windsurf, and VS Code.

At a Glance & Executive Verdict

Proton Mail MCP

Communication · Local stdio

Quality: 59/100 (Good) | Auth: other

Radmail MCP

Communication · Local stdio

Quality: 61/100 (Good) | Auth: No auth required

Verdict Summary: Choose Proton Mail MCP if you need specialized Communication tools running via a local process. Choose Radmail MCP if your workspace requires Communication integration with local subprocess execution. Both servers can be configured concurrently in your client's mcpServers manifest.

Which MCP Server Should You Choose?

Choose Proton Mail MCP when:

You need dedicated capabilities in the Communication domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: other (Free / Open Source).
You have access to required keys: PROTONMAIL_USERNAME, PROTONMAIL_PASSWORD.
Primary tools included: send_email, reply_email, reply_all_email.

Explore Proton Mail MCP Details

Choose Radmail MCP when:

You need dedicated capabilities in the Communication domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: No auth required (Free / Open Source).
You have access to required keys: RADMAIL_API_KEY, RADMAIL_API_URL.
Primary tools included: triage, triage_inbox, list_right_now.

Feature & Specification Comparison

Specification	Proton Mail MCP sethbang Communication	Radmail MCP radmail-ai Communication
Summary
Category & Scope	Communication	Communication
Quality signal

Tools & Capabilities Breakdown

Proton Mail MCP Tools (32)

send_email

Send an email using Proton Mail SMTP.

reply_email

Reply to a message with proper threading headers (In-Reply-To, References). Includes the quoted original message with attribution by default.

reply_all_email

Reply to all original recipients (sender + TO + CC), excluding the authenticated user. Same threading + quoting semantics as `reply_email`. Use this instead of `reply_email` + `replyAll: true` for clarity. Self-exclusion covers the whole recipient set including the primary `To`: replying-all to a m…

forward_email

Forward a message to new recipients. Original attachments are carried forward by default. Unlike reply, a forward does **not** set `In-Reply-To`/`References` — it starts its own conversation and leaves the original message's `\Answered` flag untouched.

save_draft

Save an email as a draft without sending it. The draft is placed in the user's `\Drafts` special-use folder (resolved at runtime; falls back to literal `Drafts` if no annotation). Returns the draft UID when available.

Ready-to-Paste Client Configurations

Paste either (or both) of these JSON server blocks into your client config file (e.g. claude_desktop_config.json or ~/.cursor/mcp.json).

Proton Mail MCP Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "sethbang-proton-mail-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "proton-mail-mcp"
      ],
      "env": {
        "PROTONMAIL_USERNAME": "YOUR_PROTONMAIL_USERNAME_HERE",
        "PROTONMAIL_PASSWORD": "YOUR_PROTONMAIL_PASSWORD_HERE"
      }
    }
  }
}

Radmail MCP Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "radmail-ai-radmail-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "radmail-mcp"
      ],
      "env": {
        "RADMAIL_API_KEY": "YOUR_RADMAIL_API_KEY_HERE",
        "RADMAIL_API_URL": "YOUR_RADMAIL_API_URL_HERE"
      }
    }
  }
}

Frequently Asked Questions

Proton Mail MCP is categorized under Communication and uses a local stdio subprocess. In contrast, Radmail MCP belongs to Communication using local stdio subprocess. Select Proton Mail MCP when you need capabilities focused on communication and Radmail MCP when you require tools for communication.

More alternatives to Proton Mail MCP More alternatives to Radmail MCP Communication category hub Canonical compare URL