Authorization & Policy Engine MCP Servers — ToolHive, Cedar for Agents, Cerbos, Permit.io, OPA, and More

Authorization and policy engine MCP servers reviewed: ToolHive (1.8K stars, Go, v0.28.1 CIMD auth+JWT RFC 7523), IBM ContextForge (3.7K stars, v1.0.1 GA), Cedar for Agents (25 stars, Rust, schema-generator v0.5.0), Cerbos (4.4K stars, v0.53.0), Microsoft Agent Governance Toolkit (1.6K stars, OWASP Agentic Top 10), Sondera coding agent hooks (207 stars, Cedar for Claude Code/Cursor), Permit.io, ScopeBlind, Oso Cloud MCP. Rating: 4.0/5.