# api_fuzzer

A execute tool on the Hexstrike Ai MCP server.

Agent View of the PolicyLayer registry record for `api_fuzzer`. HTML page: https://policylayer.com/tools/hexstrike-ai/api-fuzzer

## Facts

- Tool: `api_fuzzer`
- Server: Hexstrike Ai (`0x4m4/hexstrike-ai`) — https://policylayer.com/tools/hexstrike-ai.md
- Homepage: https://github.com/0x4m4/hexstrike-ai
- 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": "api_fuzzer",
    "arguments": {}
  }
}
```

## Why api_fuzzer is rated High

API fuzzing involves sending malformed or unexpected inputs to API endpoints to discover vulnerabilities. Despite the empty description, the tool name clearly indicates active execution of fuzzing attacks against external targets. On this pentesting-focused server, it would autonomously execute offensive probing operations.

From the tool's own definition: "Tool name 'api_fuzzer' on a server explicitly described as running 150+ cybersecurity tools for automated pentesting and vulnerability discovery."

## Use case

AI agents invoke api_fuzzer to trigger actions in Hexstrike Ai. 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 Hexstrike Ai:

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

## Other tools on Hexstrike Ai (149)

- `clear_cache` — Destructive — https://policylayer.com/tools/hexstrike-ai/clear-cache.md
- `delete_file` — Destructive — https://policylayer.com/tools/hexstrike-ai/delete-file.md
- `advanced_payload_generation` — Execute — https://policylayer.com/tools/hexstrike-ai/advanced-payload-generation.md
- `ai_generate_attack_suite` — Execute — https://policylayer.com/tools/hexstrike-ai/ai-generate-attack-suite.md
- `ai_generate_payload` — Execute — https://policylayer.com/tools/hexstrike-ai/ai-generate-payload.md
- `ai_reconnaissance_workflow` — Execute — https://policylayer.com/tools/hexstrike-ai/ai-reconnaissance-workflow.md
- `ai_test_payload` — Execute — https://policylayer.com/tools/hexstrike-ai/ai-test-payload.md
- `ai_vulnerability_assessment` — Execute — https://policylayer.com/tools/hexstrike-ai/ai-vulnerability-assessment.md
- `amass_scan` — Execute — https://policylayer.com/tools/hexstrike-ai/amass-scan.md
- `angr_symbolic_execution` — Execute — https://policylayer.com/tools/hexstrike-ai/angr-symbolic-execution.md
- `arjun_parameter_discovery` — Execute — https://policylayer.com/tools/hexstrike-ai/arjun-parameter-discovery.md
- `arjun_scan` — Execute — https://policylayer.com/tools/hexstrike-ai/arjun-scan.md
- `arp_scan_discovery` — Execute — https://policylayer.com/tools/hexstrike-ai/arp-scan-discovery.md
- `autorecon_comprehensive` — Execute — https://policylayer.com/tools/hexstrike-ai/autorecon-comprehensive.md
- `autorecon_scan` — Execute — https://policylayer.com/tools/hexstrike-ai/autorecon-scan.md
- `binwalk_analyze` — Execute — https://policylayer.com/tools/hexstrike-ai/binwalk-analyze.md
- `browser_agent_inspect` — Execute — https://policylayer.com/tools/hexstrike-ai/browser-agent-inspect.md
- `bugbounty_authentication_bypass_testing` — Execute — https://policylayer.com/tools/hexstrike-ai/bugbounty-authentication-bypass-testing.md
- `bugbounty_business_logic_testing` — Execute — https://policylayer.com/tools/hexstrike-ai/bugbounty-business-logic-testing.md
- `bugbounty_comprehensive_assessment` — Execute — https://policylayer.com/tools/hexstrike-ai/bugbounty-comprehensive-assessment.md
- `bugbounty_file_upload_testing` — Execute — https://policylayer.com/tools/hexstrike-ai/bugbounty-file-upload-testing.md
- `bugbounty_osint_gathering` — Execute — https://policylayer.com/tools/hexstrike-ai/bugbounty-osint-gathering.md
- `bugbounty_reconnaissance_workflow` — Execute — https://policylayer.com/tools/hexstrike-ai/bugbounty-reconnaissance-workflow.md
- `bugbounty_vulnerability_hunting` — Execute — https://policylayer.com/tools/hexstrike-ai/bugbounty-vulnerability-hunting.md
- `burpsuite_alternative_scan` — Execute — https://policylayer.com/tools/hexstrike-ai/burpsuite-alternative-scan.md
- `burpsuite_scan` — Execute — https://policylayer.com/tools/hexstrike-ai/burpsuite-scan.md
- `checkov_iac_scan` — Execute — https://policylayer.com/tools/hexstrike-ai/checkov-iac-scan.md
- `clair_vulnerability_scan` — Execute — https://policylayer.com/tools/hexstrike-ai/clair-vulnerability-scan.md
- `comprehensive_api_audit` — Execute — https://policylayer.com/tools/hexstrike-ai/comprehensive-api-audit.md
- `create_attack_chain_ai` — Execute — https://policylayer.com/tools/hexstrike-ai/create-attack-chain-ai.md
- …and 119 more: https://policylayer.com/tools/hexstrike-ai.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=hexstrike-ai · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/hexstrike-ai