Quick Install

Copy the config for your editor. Some servers may need additional setup — check the README.

Add to claude_desktop_config.json:

{
  "mcpServers": {
    "mcp-guardrails": {
      "command": "uvx",
      "args": [
        "mcp-guardrails"
      ]
    }
  }
}

Or install with pip: pip install mcp-guardrails

README Excerpt

An **agentgateway ExtMcp guardrail sidecar** that wraps an ONNX-based PromptGuard-2 scanner (prompt-injection detection via the public, non-gated Guardrails-style rule engine (cross-call toxic-flow / loop detection) behind the agentgateway ExtMcp gRPC contract. The sidecar is **fail-closed by default**, listens on plaintext HTTP/2 (`h2c`) gRPC on `:9001`, and is driven

Tools (20)

AUDIT_LOG_PATHCheckRequestCheckResponseENABLE_AGENT_ALIGNMENTENABLE_PROMPTGUARDENABLE_REGEX_SCANNERFAILURE_MODEGUARDRAIL_DRY_RUNHF_HOMEHUMAN_REVIEW_MODEINVARIANT_RULES_MODULEINVARIANT_RULES_PATHINVARIANT_WINDOWLF_ALIGNMENT_API_BASELF_ALIGNMENT_API_KEYLF_ALIGNMENT_MODELLF_ONNX_FILELF_ONNX_MODELLF_PROMPTGUARD_BLOCK_THRESHOLDLISTEN_ADDR

mcp-guardrails

Quick Install

README Excerpt

Tools (20)

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