VulnFeed

VulnFeed — Dependency Vulnerability Monitoring for Claude Code

An MCP server that scans your project dependencies for known vulnerabilities, enriches with EPSS exploit probability scores, and recommends fix versions.

Free tier — 10 scans/day, 1 monitored project, no signup required. Single-CVE lookup and webhooks need a license key or x402.

Homepage: vulnfeed.novadyne.ai

Install

uvx vulnfeed-mcp

MCP client config

Add to your MCP client config (~/.claude/settings.json for Claude Code, claude_desktop_config.json for Claude Desktop):

Free tier (no signup, no API key):

{
  "mcpServers": {
    "vulnfeed": {
      "command": "uvx",
      "args": ["vulnfeed-mcp"]
    }
  }
}

Paid ($14/mo, unlimited scans + projects):

{
  "mcpServers": {
    "vulnfeed": {
      "command": "uvx",
      "args": ["vulnfeed-mcp"],
      "env": {
        "VULNFEED_API_KEY": "YOUR_LICENSE_KEY_HERE"
      }
    }
  }
}

Get a license key at vulnfeed.novadyne.ai.

x402 micropayments

VulnFeed also accepts x402 micropayments — AI agents can pay per scan with USDC on Base, no API key or signup needed. When the free tier limit is reached, the API returns HTTP 402 with payment requirements that x402-compatible clients handle automatically.

• $0.01 per scan
• $0.002 per CVE lookup
• $0.50 per project per 30 days of hourly webhook monitoring (renewable; the webhook receives an expiring event with the renew URL a day before)

Tools

Scanning

Tool	Description
scan_project	Auto-detect and scan all lockfiles in a directory
scan_lockfile	Scan a specific lockfile
check_package	Check a single package for vulnerabilities
lookup_cve	Detailed CVE info with EPSS + fix versions (license key or x402)

Monitoring

Tool	Description
monitor_project	Register for continuous monitoring (optional webhook_url for push alerts)
check_alerts	New vulns since last scan
set_webhook	Set, rotate or remove a project's webhook
update_deps	Update snapshot after upgrading packages
list_monitored	See all monitored projects
unmonitor_project	Remove from monitoring

Supported lockfiles

• package-lock.json (npm)
• yarn.lock (Yarn)
• pnpm-lock.yaml (pnpm)
• requirements.txt (pip)
• Pipfile.lock (Pipenv)
• go.sum / go.mod (Go)
• Cargo.lock (Rust)
• Gemfile.lock (Ruby)
• composer.lock (PHP)

How it works

1. Parses your lockfile to extract dependency names + versions
2. Queries OSV.dev (GitHub Advisories plus each ecosystem's security database) for known CVEs
3. Enriches with EPSS exploit probability scores
4. Filters noise — suppresses low-EPSS, non-critical CVEs by default
5. Sorts by exploitability — most likely to be exploited first
6. Returns fix versions from each advisory's affected-version ranges

Smart filtering

By default, VulnFeed suppresses low-priority CVEs (EPSS < 10% AND CVSS < 9.0). This cuts noise by ~80%.

Pass show_all=True to any scan tool to see everything.

Continuous monitoring

1. monitor_project — takes a baseline snapshot of current deps + known vulns
2. check_alerts — diffs against baseline, surfaces only new vulns
3. Either run check_alerts periodically, or pass webhook_url and let VulnFeed do it

With a webhook (a paid feature: a license key, or for agents x402 at $0.50 per project per 30-day term), VulnFeed re-scans the project every hour and POSTs new findings to your URL:

{
  "event": "vulnfeed.new_vulns",
  "delivery_id": "…", "project_id": "…", "project_name": "…", "sent_at": "…",
  "count": 1,
  "new_vulns": [{ "id": "GHSA-…", "package": "express", "version": "4.18.2", "severity": "HIGH",
                  "epss": { "score": 0.42 }, "fix_version": "4.19.2", "summary": "…" }],
  "alerts_url": "https://vulnfeed-api.novadyne.ai/vulnscan/alerts?project=…"
}

Every delivery carries X-VulnFeed-Signature: sha256=<hex>, the HMAC-SHA256 of the raw body under the webhook_secret returned once when the webhook was set. Verify it. Failed deliveries are retried on later sweeps for about a day, then dropped and counted. Rotate or remove the webhook with set_webhook.

License

MIT