Scan My MCP
Audit MCPs for security vulnerabilities.
What it does
MCP servers hand tools and prompts directly to LLM agents — most have never been audited. scan-my-mcp connects to any MCP server, enumerates everything it exposes, and runs 6 security checks: secret exposure, auth enforcement, dangerous permissions, input validation, prompt injection, and context-window cost. Every finding includes the exact location and a fix. Try it instantly at mcpscanner.yxsh.in or install CLI tool for local MCPs.
Does the same job
all alternatives →- MSMCP-Shield – Detect security issues in MCP servers2025 · github.com · ▲134
I noticed the growing security concerns around MCP (https://news.ycombinator.com/item?id=43600192) and built an open source tool that can detect several patterns of tool poisoning attacks, exfiltration channels and cross-origin manipulations. MCP-Shield scans your installed servers (Cursor, Claude Desktop, etc.) and shows what each tool is trying to do at the instruction level, beyond just the API surface. It catches hidden instructions that try to read sensitive files, shadow other tools' behavior, or exfiltrate data. Example of what it detects: - Hidden instructions…
- MFMCPGod: Fine-grained control over MCP clients, servers, and tools2025 · github.com · ▲37
Hey everyone, I've wanted an easy way to control which mcp server tools are available to clients. So for example, I might want a gmail server to only expose the read tool (but not send, delete etc). I figured if I create a cli for spawning mcp servers, I could intercept the stdin, stdout, stderr etc and modify what the clients see when they are making calls to list tools, resources, and prompts. Well it worked! In the initial version you can easily add a server to claude with a safe list of tools: npx -y mcpgod add @modelcontextprotocol/server-everything --client claude --tools=echo,add…
- MSMCP Security Suite2025 · github.com · ▲36
Hi HN! We kept seeing devs get pwned through MCP tools in ways that security scanners completely miss. So we built an open-source analyzer to catch these attacks. Our first OSS by Mighty team. The problem: At Defcon, we saw MCP exploits with 100% success rate against Claude and Llama. Three attack patterns: Hidden Unicode in "error messages" - Paste a colleague's error into Claude, your SSH keys get exfiltrated Trusted tool updates - That database tool you've used for months? Last week's update added credential theft Tool redefinition - Malicious tool redefines "deploy to prod" to run…
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