io.github.petrovicistefan/mcp-security-guard
MCP Security Guard
Audit MCP servers for tool poisoning, rug pulls and supply-chain risk (OWASP MCP Top 10).
alive probed 2026-10-15
17tools
5.4ktokens in Claude Opus 5.5
5.6ktokens in Claude Code
2.7 %of a 200k context window
3.1ko200k_base estimate
241 msto initialize
28 msto list tools
- Run it
- npx -y mcp-security-guard@0.9.0 (stdio, probed in a container with the network off)
- Host
- npmjs.com
- Reports itself as
- mcp-security-guard 0.9.0
- Capabilities
- resources, tools
- Instructions
- 343 characters
- Claude count
- Claude Opus 5.5, measured 2026-10-15. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/petrovicistefan/mcp-security-guard
- Website
- https://github.com/petrovicistefan/mcp-security-guard#readme
- Registry
- active, updated 2026-10-09 · registry entry
- Reachable
- 1 of the last 1 probe
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| apply_fixes | 301 | 10 % |
| adversarial_test | 271 | 9 % |
| audit_server_tools | 240 | 8 % |
| check_supply_chain | 239 | 8 % |
| pin_context | 222 | 7 % |
Badge and feed
[](https://mcpcost.ulehla.dev/s/io.github.petrovicistefan/mcp-security-guard)
An entry for every probe that changed the result, the tool count or the token cost: Atom feed. Add it to a feed reader or a Slack RSS app to hear when the server stops answering or its tool set grows.