SkillsSafe — AI Skill Security Scanner

Free, no-signup security scanner for AI agent skills. Scan any SKILL.md, MCP config, or system_prompt for threats before installing.

🌐 skillssafe.com

What Is SkillsSafe?

As AI agents become more powerful, malicious skills can steal credentials, exfiltrate data, or hijack your agent's behavior. SkillsSafe scans skill files before you install them — the same way an antivirus scans software before you run it.

Supported platforms: OpenClaw · Claude Code · Cursor · Codex · any MCP-compatible agent

Features

🔍 Security Scanner

Paste content, enter a URL, or upload a file to scan for:

Threat	Description
Credential Theft	Attempts to access API keys, tokens, or passwords
Data Exfiltration	Skills that send your data to external servers
Prompt Injection	Hidden instructions that hijack agent behavior
Shell Injection	Reverse shell or arbitrary command execution
Zero-Width Characters	Invisible Unicode characters hiding malicious instructions
Scope Creep	Skills requesting permissions beyond their stated purpose
Memory Poisoning	Attempts to corrupt agent memory or context
Privacy Risk	Unnecessary access to personal or sensitive data

Each scan returns a risk score, severity rating (SAFE / CAUTION / DANGER / CRITICAL), and a shareable report link.

👁️ Zero-Width Character Detector

Visualize invisible Unicode characters (U+200B, U+200C, U+200D, U+FEFF, etc.) hidden inside text. Attackers embed these to create prompts that look safe to humans but carry hidden instructions for AI agents.

🔌 MCP Server Integration

Native Model Context Protocol support — let your agent automatically check skill safety before installation. No API key required.

bash

# OpenClaw (one-line setup)
openclaw mcp add https://skillssafe.com/api/mcp

Available MCP tools:

scan_url — Scan a skill by URL
scan_content — Scan skill content directly
get_report — Retrieve a full scan report

📡 REST API

Works with any agent, script, or CI/CD pipeline.

bash

# Scan by URL
curl -X POST https://skillssafe.com/api/v1/scan/url \
  -H "Content-Type: application/json" \
  -d '{"url": "https://clawhub.ai/skills/example"}'

# Scan by content
curl -X POST https://skillssafe.com/api/v1/scan/content \
  -H "Content-Type: application/json" \
  -d '{"content": "...skill content..."}'

Full OpenAPI spec: https://skillssafe.com/api/v1/openapi.json

Pages

Route	Description
`/`	Main security scanner
`/zero-width-detector`	Hidden Unicode character detector
`/api-docs`	Interactive API documentation
`/integrate`	Integration guide for MCP & REST API
`/feedback`	Bug reports and feature requests

Getting Started (Local Development)

Terminal

npm install
npm run dev

Open http://localhost:3000 in your browser.

Environment Variables

bash

# .env.local
# (see wrangler.toml for Cloudflare Workers configuration)

Tech Stack

Framework: Next.js (App Router)
Deployment: Cloudflare Workers via @opennextjs/cloudflare
Database: Cloudflare D1 (SQLite)
i18n: next-intl (English · 中文 · 日本語)

Pricing

100% Free · No Signup · No Rate Limits for Humans

API rate limit: 60 requests/hour (no API key required).

Feedback & Support

Found a bug or false positive? Send feedback or email support@skillssafe.com.

SkillsSafe is an independent security tool, not affiliated with Anthropic, OpenClaw, or Cisco.