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mcp-guardian

Security and governance proxy for MCP infrastructure. Enforces YAML-configurable policies (blocklists, rate limits, token budgets), tracks real token costs via tiktoken, monitors server health with live JSON-RPC probes. Features include OAuth 2.1/OIDC with RBAC, web dashboard with Prometheus metrics, payload normalization against encoding bypasses, semantic shell AST analysis, mTLS zero-trust networking, circuit breakers, and a formal STRIDE threat model. 168 tests across 16 suites. Install: npm install -g @mcp-guardian/server

Prometheus npm
Unscored visibility — 1/3 applicable dimensions scored
○ Schema Quality — Protocol — Reliability ○ Docs & Maintenance ✓ Security Hygiene — Schema Interpretability
Schema Quality
42% weight
Protocol Compliance
N/A
Local server
Reliability
N/A
Local server
Docs & Maintenance
25% weight
Security Hygiene
95
33% weight
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