DepHealth MCP

Dependency security & health auditing for AI agents — no account, no API key.

DepHealth is an MCP server that lets any AI agent (Claude Code, Claude Desktop, Cursor, …) answer two questions instantly:

• "Are this project's dependencies safe?" → audit_project

• "Should I add / upgrade to this package?" → check_package

Vulnerability data comes from Google's OSV.dev (738K+ advisories, 40+ ecosystems); package health signals (latest version, license, release recency, deprecation) come from deps.dev. Both are free public APIs — zero signup, zero keys, zero config.

Why this instead of Snyk/Socket MCP?

MCP servers are notorious for context bloat (some inject 50K+ tokens of schema). DepHealth exposes 2 tools, 1 resource, 1 prompt with compact structured outputs — advisories are capped at 5 per package, worst-severity first, with the fix version included.

Related MCP server: @4da/mcp-server

Install

Requires Python 3.11+ and uv.

git clone https://github.com/hasarahman/dephealth-mcp
cd dephealth-mcp && uv sync

Claude Code:

claude mcp add --scope user dephealth -- uv run --project /path/to/dephealth-mcp dephealth-mcp

Claude Desktop (claude_desktop_config.json):

{
  "mcpServers": {
    "dephealth": {
      "command": "uv",
      "args": ["run", "--project", "/path/to/dephealth-mcp", "dephealth-mcp"]
    }
  }
}

Tools

audit_project(path)

Scans every supported manifest directly in path — package.json, requirements.txt, pyproject.toml, go.mod, Cargo.toml — batch-queries OSV, and returns a structured report:

verdict: "1 of 2 checked dependencies have known vulnerabilities (worst severity: HIGH)."
vulnerable_packages:
  - lodash 4.17.20 (npm) — 5 advisories
      GHSA-35jh-r3h4-6jhm  CVE-2021-23337  HIGH  Command Injection  fixed_in: 4.17.21
      ...
unpinned_skipped: ["flask"]   # hygiene flag: deps with no resolvable version

Range specifiers (^4.17.20, >=2.0) are audited at their floor and marked version_is_range_floor: true.

check_package(ecosystem, name, version?)

The "should I add this?" tool. Omit version to check the latest release. Combines OSV advisories with deps.dev health signals and returns a verdict:

• avoid — CRITICAL/HIGH vulnerabilities in this version

• caution — lower-severity vulns, no release in 2+ years, or deprecated

• ok — clean and maintained

check_package("npm", "left-pad")
→ verdict: caution
  reasons: ["no release since 2018-04-09 (possibly unmaintained)",
            "latest version is marked deprecated"]

Resource & prompt

• dephealth://ecosystems — supported ecosystems and their manifest files

• security_review(project_path) — a guided prompt: audit, verify upgrade targets are clean, produce a prioritized remediation list

Development

uv run pytest        # in-process MCP client tests (hit the live free APIs)
uv run fastmcp dev src/dephealth_mcp/server.py   # interactive inspector

Built with FastMCP. MIT license.