# nyxstrike_h2csmuggler

A execute tool on the Nyxstrike MCP server.

Agent View of the PolicyLayer registry record for `nyxstrike_h2csmuggler`. HTML page: https://policylayer.com/tools/nyxstrike/nyxstrike-h2csmuggler

## Facts

- Tool: `nyxstrike_h2csmuggler`
- Server: Nyxstrike (`CommonHuman-Lab/nyxstrike`) — https://policylayer.com/tools/nyxstrike.md
- Homepage: https://github.com/CommonHuman-Lab/nyxstrike
- Risk category: Execute (High risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Rate-limited

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "nyxstrike_h2csmuggler",
    "arguments": {}
  }
}
```

## Why nyxstrike_h2csmuggler is rated High

H2C smuggling is an active attack technique that exploits HTTP/2 upgrade mechanisms to bypass security controls, proxy authentication, and access internal services. On an offensive security platform alongside tools like payload generation, aircrack, and vulnerability assessment, this tool almost certainly executes HTTP/2 smuggling attacks against targets.

From the tool's own definition: "Tool name 'nyxstrike_h2csmuggler' references h2csmuggler, a known HTTP/2 cleartext (h2c) request smuggling attack tool used in offensive security/penetration testing."

## Use case

AI agents invoke nyxstrike_h2csmuggler to trigger actions in Nyxstrike. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started.

## Recommended policy (PolicyLayer)

Verdict: **Rate-limited**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Nyxstrike:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "nyxstrike_h2csmuggler": {
      "limits": [
        {
          "counter": "nyxstrike_h2csmuggler_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}
```

## Other tools on Nyxstrike (220)

- `clear_cache` — Destructive — https://policylayer.com/tools/nyxstrike/clear-cache.md
- `delete_file` — Destructive — https://policylayer.com/tools/nyxstrike/delete-file.md
- `wordlist_delete` — Destructive — https://policylayer.com/tools/nyxstrike/wordlist-delete.md
- `advanced_payload_generation` — Execute — https://policylayer.com/tools/nyxstrike/advanced-payload-generation.md
- `ai_generate_attack_suite` — Execute — https://policylayer.com/tools/nyxstrike/ai-generate-attack-suite.md
- `ai_generate_payload` — Execute — https://policylayer.com/tools/nyxstrike/ai-generate-payload.md
- `ai_reconnaissance_workflow` — Execute — https://policylayer.com/tools/nyxstrike/ai-reconnaissance-workflow.md
- `ai_test_payload` — Execute — https://policylayer.com/tools/nyxstrike/ai-test-payload.md
- `ai_vulnerability_assessment` — Execute — https://policylayer.com/tools/nyxstrike/ai-vulnerability-assessment.md
- `airbase_ng` — Execute — https://policylayer.com/tools/nyxstrike/airbase-ng.md
- `aircrack_ng` — Execute — https://policylayer.com/tools/nyxstrike/aircrack-ng.md
- `aircrack_ng_analysis` — Execute — https://policylayer.com/tools/nyxstrike/aircrack-ng-analysis.md
- `airdecap_ng` — Execute — https://policylayer.com/tools/nyxstrike/airdecap-ng.md
- `aireplay_ng` — Execute — https://policylayer.com/tools/nyxstrike/aireplay-ng.md
- `airmon_ng` — Execute — https://policylayer.com/tools/nyxstrike/airmon-ng.md
- `airodump_ng` — Execute — https://policylayer.com/tools/nyxstrike/airodump-ng.md
- `amass_scan` — Execute — https://policylayer.com/tools/nyxstrike/amass-scan.md
- `analyze_session` — Execute — https://policylayer.com/tools/nyxstrike/analyze-session.md
- `anew_data_processing` — Execute — https://policylayer.com/tools/nyxstrike/anew-data-processing.md
- `angr_symbolic_execution` — Execute — https://policylayer.com/tools/nyxstrike/angr-symbolic-execution.md
- `api_fuzzer` — Execute — https://policylayer.com/tools/nyxstrike/api-fuzzer.md
- `api_schema_analyzer` — Execute — https://policylayer.com/tools/nyxstrike/api-schema-analyzer.md
- `arjun_parameter_discovery` — Execute — https://policylayer.com/tools/nyxstrike/arjun-parameter-discovery.md
- `arjun_scan` — Execute — https://policylayer.com/tools/nyxstrike/arjun-scan.md
- `arp_scan_discovery` — Execute — https://policylayer.com/tools/nyxstrike/arp-scan-discovery.md
- `autopsy_analysis` — Execute — https://policylayer.com/tools/nyxstrike/autopsy-analysis.md
- `autorecon_comprehensive` — Execute — https://policylayer.com/tools/nyxstrike/autorecon-comprehensive.md
- `autorecon_scan` — Execute — https://policylayer.com/tools/nyxstrike/autorecon-scan.md
- `bbot_scan` — Execute — https://policylayer.com/tools/nyxstrike/bbot-scan.md
- `bettercap_wifi` — Execute — https://policylayer.com/tools/nyxstrike/bettercap-wifi.md
- …and 190 more: https://policylayer.com/tools/nyxstrike.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=nyxstrike · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/nyxstrike