groundmail-mcp@0.28.1
VERIFIEDPublisher 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 4 days agoInstalls 10,276Last detonated 2 h ago
Is [email protected] safe to install?
KillerSkills ran it in the KillerSkills honeypot sandbox (2 scenarios) on 2026-11-05 and scored it 84/100 (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 · 3 s · 2 scenarios · 0 deviationst+CategoryObserved action
0.0sprocessno install scripts in bundle
2.5sprocessdependency install exit 1
2.8sprocessexec /usr/bin/timeout
2.8sprocessexited 1: Node.js v22.23.4
2.8sclaimedno tools/list reply (exit 1)
2.8sprocessscript 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.
AST01HIGH
Authorization escalation languageREADME.md:44 · Authorization escalation languageFix: Remove the text that addresses the agent rather than the reader; describe behavior, do not instruct.
AST01MEDIUM
npx invocation of non-well-known packagedist/index.js:1532 · npx invocation of non-well-known package — may execute untrusted codeFix: Pin versions and sources; vendor anything fetched at install time.
AST06