# MCP-Gatekeeper

> MCP-Gatekeeper — sudo-hrmn-mcp-gatekeeper. Use this tool when you need to protect MCP clients from security threats and ensure policy compliance. The MCP-Gatekeeper enforces security policies, scans for potential threats, and requires human approval to prevent tool poisoning, prompt injection, and unauthorized schema changes. It is ideal for use cases requiring robust runtime security and control over MCP client interactions.

Canonical page: https://skillsregistry.net/skills/sudo-hrmn-mcp-gatekeeper  
JSON: https://api.skillsregistry.net/v1/skills/sudo-hrmn-mcp-gatekeeper

## Description

Runtime security gateway and FastMCP server that protects MCP clients from tool poisoning, prompt injection, and unauthorized tool schema changes through policy enforcement, fail-closed scanning, and human approval gates.

## Trust

- **Trust score (0–1):** 0.67
- **Verification tier:** scanned
- **Last scanned:** 2026-09-04

## Facts

- **Version:** 1.0.0
- **Skill type:** atomic
- **Execution layer:** mcp-remote
- **Runtime environment:** api
- **Category:** ai-ml
- **Updated:** 2026-09-04

## Source

- **Source listing:** [Glama](https://glama.ai/mcp/servers/ef9lvfs7nc)
- **Repository:** <https://github.com/sudo-hrmn/MCP-Gatekeeper>

## Use it

Resolve this record through the SkillsRegistry MCP server (no auth, read-only):

```
claude mcp add --transport http --scope user skillsregistry https://api.skillsregistry.net/mcp
```

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_skill",
    "arguments": {
      "slug": "sudo-hrmn-mcp-gatekeeper"
    }
  }
}
```

REST: `GET https://api.skillsregistry.net/v1/skills/sudo-hrmn-mcp-gatekeeper` · pull for local use: `GET https://api.skillsregistry.net/v1/skills/sudo-hrmn-mcp-gatekeeper/pull`

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SkillsRegistry indexes agent skills from public registries and GitHub. Skills we have analysed are scanned with Circle-IR and scored on six dimensions; each listing states its scan coverage. More: https://skillsregistry.net/llms.txt