Protonmail (barhatch) MCP Server
protonmail-mcp-server
npm
v1.0.1
Source verified
Published by barhatch — publish provenance cryptographically ties this package to that repository. That is proof of origin, not an official vendor package.
Professional ProtonMail MCP server with 23 tools for email management, folder operations, analytics, and seamless Proton Bridge integration.
The grade answers one question — how safe is this server for you to adopt — so it is computed in two auditable stages. Nothing below is an opinion or an LLM's guess; every line is a real term the deterministic engine applied, and the same input always yields the same number.
1. Threat score — 100 − 0 = 100. What the published surface and source actually contain:
The deterministic scan raised no scored threat in the surface it inspected — the threat score stayed at 100. Capability observations and advisory notes are recorded but never lower it.
2. Client adoption risk — 100 − 6 = 94. Three small, subtract-only factors that reflect your risk in adopting it — a clean scan proves less on a powerful, unverified or barely-inspectable package, so the grade says so plainly:
| Points | Adoption-risk factor |
|---|---|
| −6 | capability blast radius (high) — client exposure if the model is manipulated |
Capability observations and info notes are shown under Findings but never scored.
Open any row's finding below for the file, line and evidence behind a deduction.
Findings 1
high Sensitive-source and external-sink co-existMTC-FLOW-004
Tools that read sensitive data ([get_logs]) and tools that can send data out ([send_email]) are exposed together. An agent can move private data to the sink.
Evidence: sources [get_logs] → sinks [send_email]
Fix: Keep secret-reading and egress capabilities on separate, separately-approved servers.
Location: flow get_logs → send_email
Tools 25
Each tool and what it can reach — statically extracted from the published source.
get_logsreads sensitive datasend_emailnetwork egressadd_labelno sensitive capabilitybulk_add_labelno sensitive capabilitybulk_move_emailsno sensitive capabilityclear_cacheno sensitive capabilitycreate_folderno sensitive capabilitydelete_emailno sensitive capabilitydelete_folderno sensitive capabilityget_connection_statusno sensitive capability
Show 15 more tools ↓
get_contactsno sensitive capabilityget_email_analyticsno sensitive capabilityget_email_by_idno sensitive capabilityget_email_statsno sensitive capabilityget_emailsno sensitive capabilityget_foldersno sensitive capabilityget_volume_trendsno sensitive capabilitymark_email_readno sensitive capabilitymove_emailno sensitive capabilityrename_folderno sensitive capabilitysearch_emailsno sensitive capabilitysend_test_emailno sensitive capabilitystar_emailno sensitive capabilitysync_emailsno sensitive capabilitysync_foldersno sensitive capability
Toxic flows 1
Cross-tool combinations that form a data-exfiltration primitive (untrusted input → sensitive source → external sink).
What this scan could not see
- Tools were statically extracted from the published source (25 recovered), not enumerated from a running server. Tool-poisoning, Unicode-smuggling, capability and toxic-flow analysis ran on this inferred surface, but a mis-parsed registration could be missed or mis-attributed, so tool-derived findings are capped below “confirmed”. To grade the real runtime surface, scan the running server: --command "npx -y <package>".
Versions 1
Scan history per published version. The engine is deterministic — the same version always yields the same score, so a changed score means the package itself changed.
| Version | Score | Findings | Engine | Scanned |
|---|---|---|---|---|
v1.0.1 latest |
A 94/100 | 1 | 1.13.0 | 2026-09-07 |
Embed this score
Show this server's live Trust Score in your README, docs or website. The badge is served straight from the registry and updates automatically after every rescan — no API key needed. It links back to this page, so anyone who sees the grade can also read the findings behind it instead of taking a number on faith.
Verify this score yourself
The score above is reproducible: the same package version always yields the same result. Run it locally or over the free API — no account, no LLM, fully deterministic.
npx mcptrustchecker scan protonmail-mcp-server --onlineOther implementations of Protonmail 2
Independent packages implementing the same tool, scanned with the same engine. Compare all 3 side by side →
MCP server for Proton Mail via Proton Mail Bridge (IMAP/SMTP). Dual transport: stdio + streamable HTTP.
MCP server for ProtonMail via Proton Bridge (SMTP + IMAP)
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