Side-by-Side Model Context Protocol Comparison
Proton Mail MCP vs Winnr
In-depth architectural comparison of the Proton Mail MCP and Winnr 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: 63/100 (Good) | Auth: other
Winnr
Communication · Local stdio
Quality: 52/100 (Good) | Auth: No auth required
Verdict Summary: Choose Proton Mail MCP if you need specialized Communication tools running via a local process. Choose Winnr 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, READONLY, ALLOW_FILE_DOWNLOAD_DIR, ALLOW_EMPTY_FOLDER, RESTRICT_OUTBOUND_TO_SELF. - Primary tools included: send_email, reply_email, reply_all_email.
W
Choose Winnr 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:
WINNR_API_TOKEN. - Primary tools included: winnr_get_account, winnr_get_usage, winnr_list_jobs.
Feature & Specification Comparison
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
Winnr Configuration