Skills/npm/groundmail-mcp

groundmail-mcp@0.20.1

VERIFIED

Publisher claims: "Groundmail MCP server: send transactional email, manage domains, templates, webhooks and suppressions from Claude, Cursor, ChatGPT and other MCP clients" Observed in sandbox: no network, touches nothing outside the project, writes no memory.

Registry npm (MCP server)Publisher groundmail · joined 0 days agoInstalls 6,671Last detonated 7 h ago
$claude mcp add groundmail-mcp -- npx -y groundmail-mcp
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Is [email protected] safe to install?

KillerSkills ran it in the KillerSkills honeypot sandbox (2 scenarios) on 2026-11-01 and scored it 87/100 (Verified). It did what it claims and nothing else we could detect: no undeclared network egress, no credential reads, no persistent instruction writes. Summary: no network, touches nothing outside the project, writes no memory.

Behavior trace

Honeypot run · 1 s · 2 scenarios · 0 deviations
t+CategoryObserved action
0.0sprocessno install scripts in bundle
1.1sprocessdependency install exit 1
1.2sprocessexec /usr/bin/timeout
1.2sprocessexited 1: Node.js v22.23.4
1.2sclaimedno tools/list reply (exit 1)
1.2sprocessscript backend runs setup only

Static findings

CRITICAL
Prompt injectionREADME.md:44 · Prompt injection — known jailbreak technique referenceFix: Keep SKILL.md to visible, descriptive text. Remove comments and encoded text that address the agent.
AST01
MEDIUM
npx invocation of non-well-known packagedist/index.js:1246 · npx invocation of non-well-known package — may execute untrusted codeFix: Pin versions and sources; vendor anything fetched at install time.
AST06
HIGH
Authorization escalation languageREADME.md:44 · Authorization escalation languageFix: Remove the text that addresses the agent rather than the reader; describe behavior, do not instruct.
AST01