SkillTotal

Is Hackmd MCP server safe?

No malicious indicators - review capabilities before installing
Notable — review in context (capabilities are not malware):
  • npm prepare hook
  • MCP tool surface detected

hackmd-mcp is an AI npm_package analyzed by SkillTotal's deterministic static scanner. The scan found no malicious indicators, though 2 risky constructs are reported for review. It can: install time execution and mcp tools detected — capabilities are what the code can do, not a verdict on intent. Risk score 0/100 (low).

hackmd-mcp 1.5.7

npm_package · https://github.com/yuna0x0/hackmd-mcp
LOW
0
/ 100 risk score
Snapshot · scanned Aug 5, 2026 · hackmd-mcp@1.5.7 · engine 0.38.1 / ruleset 42

Automated static-analysis result. It can contain false positives and false negatives, and is not a claim about the intent of Hackmd MCP server's authors. Report a false positive.

Capabilities — what this component can do (not a risk score):
install time executionmcp tools detected

Behavioral traits

How this component maps to the CSA agentic threat model. Descriptive — it never affects the risk score.

Tool surface
Tool Usage
Supply-chain provenance risk
General Protections / Supply Chain

Findings (2)

MEDIUMnpm prepare hookST-INSTALL-NPM-PREPARE

package.json has a 'prepare' script (runs on git/local installs and before publishing).

"prepare": "pnpm run build",

Why it matters: Usually a build step, but confirm it doesn't fetch or run remote code.

Fix: Usually a legitimate build step; confirm it only builds and does not fetch or execute remote code.

LOWMCP tool surface detectedST-MCP-DETECTED

An MCP tool surface (manifest or tool definitions) was found.

Why it matters: Just context — review which tools it offers and their permissions.

Fix: Review the declared MCP tools and their permissions.

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How we determine this: deterministic static analysis (regex + AST), evidence-anchored, no code execution. Methodology →