Whatsapp (sjawhar) MCP Server
@sjawhar/whatsapp-mcp
npm
v2.4.0
Source verified
Published by sjawhar — publish provenance cryptographically ties this package to that repository. That is proof of origin, not an official vendor package.
Security-hardened WhatsApp MCP server built with Baileys
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 − 1.2 = 99. What the published surface and source actually contain:
| Points | What was found | Category |
|---|---|---|
| −1.2 | Package runs install-time scripts MTC-SUP-010 | supply-chain |
2. Client adoption risk — 99 − 3 = 96. 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 |
|---|---|
| −3 | capability blast radius (moderate) — 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 2
medium Untrusted input can drive an external actionMTC-FLOW-005
Untrusted-input tools ([get_unread_messages, download_media]) co-exist with external-action tools ([send_message]). A prompt injection could cause unwanted external actions, though no direct sensitive-data leak path was found.
Evidence: untrusted [get_unread_messages, download_media] → sinks [send_message]
Fix: Require confirmation for state-changing/egress actions triggered after processing untrusted content.
Location: flow get_unread_messages → send_message
low Package runs install-time scripts (postinstall)MTC-SUP-010
"@sjawhar/whatsapp-mcp" executes postinstall script(s) at install time. An install hook runs at install time; most are routine build/setup, but review what it does before trusting it.
Evidence: npx --yes patch-package || true
Fix: Review the scripts; install with --ignore-scripts where possible and vet what they do.
Location: package @sjawhar/whatsapp-mcp
Tools 17
Each tool and what it can reach — statically extracted from the published source.
download_mediaingests untrusted inputget_unread_messagesingests untrusted inputsend_messagenetwork egressdelete_chatno sensitive capabilitydelete_messageno sensitive capabilityget_chatno sensitive capabilityget_message_contextno sensitive capabilityget_my_profileno sensitive capabilitylist_chatsno sensitive capabilitylist_messagesno sensitive capability
Show 7 more tools ↓
resolve_contactsno sensitive capabilitysearch_contactsno sensitive capabilitysearch_messagesno sensitive capabilitysend_fileno sensitive capabilitysync_contactsno sensitive capabilitytranscribe_voice_noteno sensitive capabilityupdate_contactno 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 (17 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 |
|---|---|---|---|---|
v2.4.0 latest |
A 96/100 | 2 | 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 @sjawhar/whatsapp-mcp --onlineOther implementations of Whatsapp 11
Independent packages implementing the same tool, scanned with the same engine. Compare all 12 side by side →
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