# MCPHammer

> Use this tool when you need to evaluate vulnerabilities in Model Context Protocol server implementations and demonstrate real-world attack vectors. MCPHammer provides a framework for testing vulnerabilities through various techniques, including prompt injection and command-and-control, and offers a web-based management console for coordination. It is particularly useful for offensive security research and penetration testing, accepting inputs such as server implementations and tool arguments, and producing outputs such as vulnerability assessments and exploit demonstrations.

Canonical page: https://skillsregistry.net/skills/praetorian-mcphammer  
JSON: https://api.skillsregistry.net/v1/skills/praetorian-mcphammer

## Description

MCPHammer is an offensive security research framework built by Praetorian for evaluating vulnerabilities in Model Context Protocol server implementations. It provides tools that demonstrate real-world attack vectors including prompt injection via text injection, command-and-control through tool argument scanning, arbitrary file download and execution, and data exfiltration through query interception. The framework includes a companion conversation-assistant component that demonstrates covert C2 channels using chained integrations with services like Slack, along with a web-based management console for coordinating multiple deployed instances.

## Trust

- **Trust score (0–1):** 0.00
- **Verification tier:** scanned
- **Last scanned:** 2026-09-28

## Facts

- **Version:** 1.0.0
- **Skill type:** atomic
- **Execution layer:** mcp-remote
- **Runtime environment:** api
- **Category:** devops-ci
- **Updated:** 2026-09-28

## Source

- **Source listing:** [PulseMCP](https://www.pulsemcp.com/servers/praetorian-mcphammer)
- **Repository:** <https://github.com/praetorian-inc/mcphammer>

## 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": "praetorian-mcphammer"
    }
  }
}
```

REST: `GET https://api.skillsregistry.net/v1/skills/praetorian-mcphammer` · pull for local use: `GET https://api.skillsregistry.net/v1/skills/praetorian-mcphammer/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