Mcp Server — Rego Policies for OPA

8 open-source Rego policies encoding benchmarks/cis/mcp_server policies. Apache 2.0, Rego v1, ready to load into OPA or Enterprise OPA.

What this is

8 Rego policy files encoding benchmarks/cis/mcp_server policies, part of the Rego Policy Libraries — a standalone, dependency-free collection of Open Policy Agent policies for published security and compliance standards. No orchestrator, no agent, no vendor runtime.

Load and query it

git clone https://github.com/ynotbhatc/rego_policy_libraries.git
opa eval -d rego_policy_libraries/benchmarks/cis/mcp_server -f pretty 'data'

Or load into a running OPA:

for f in rego_policy_libraries/benchmarks/cis/mcp_server/*.rego; do
  curl -X PUT --data-binary @"$f" "$OPA/v1/policies/$(basename $f .rego)"
done

Two ways to use these policies

Gating a change of state — evaluate a proposed action before it proceeds, and refuse it if it violates the standard. Measuring state — evaluate collected facts about an environment against the standard to produce compliance evidence. The same policy content serves both; only the integration differs.

Policy modules

authn_authz.rego cis_mcp_server.authn_authz
cis_mcp_server_main.rego cis_mcp_server.main
client_host_config.rego cis_mcp_server.client_host_config
governance_versioning.rego cis_mcp_server.governance_versioning
observability_audit.rego cis_mcp_server.observability_audit
resource_limits_caching.rego cis_mcp_server.resource_limits_caching
server_config.rego cis_mcp_server.server_config
transport_connectivity.rego cis_mcp_server.transport_connectivity

Contributing