# 404 Directory MCP server

Agent View of the PolicyLayer registry record for 404 Directory: identity, probed posture, risk grade, and all 11 tools classified. HTML page: https://policylayer.com/tools/404-directory

## Facts

- Server id: `MM-sheng/404-directory`
- Homepage: https://github.com/MM-sheng/404-directory
- Registry record: grade D, identity unverified
- Lifecycle: active
- Rate-limited: no
- Tools: 11
- Tool categories present: Execute, Read
- Tags: 404 directory, automation
- Record last modified: 2026-10-14T18:06:25.928Z

## Tools (11)

| Tool | Category | Risk | Record |
| --- | --- | --- | --- |
| `404_mcp` | Execute | High | https://policylayer.com/tools/404-directory/404-mcp.md |
| `invoke_registered_tool` | Execute | High | https://policylayer.com/tools/404-directory/invoke-registered-tool.md |
| `compare_tools` | Read | Low | https://policylayer.com/tools/404-directory/compare-tools.md |
| `get_capability_graph` | Read | Low | https://policylayer.com/tools/404-directory/get-capability-graph.md |
| `get_tool` | Read | Low | https://policylayer.com/tools/404-directory/get-tool.md |
| `get_trust_score` | Read | Low | https://policylayer.com/tools/404-directory/get-trust-score.md |
| `inspect_tool_server` | Read | Low | https://policylayer.com/tools/404-directory/inspect-tool-server.md |
| `list_capabilities` | Read | Low | https://policylayer.com/tools/404-directory/list-capabilities.md |
| `recommend_tools` | Read | Low | https://policylayer.com/tools/404-directory/recommend-tools.md |
| `search_official_docs` | Read | Low | https://policylayer.com/tools/404-directory/search-official-docs.md |
| `search_tools` | Read | Low | https://policylayer.com/tools/404-directory/search-tools.md |

## Tool descriptions

- `404_mcp` — 404.directory MCP Streamable HTTP endpoint. Discover and compare ecosystem tools, inspect approved remote MCP schemas, and invoke curated read-only third-party tools through a controlled gateway.
- `invoke_registered_tool` — Invoke exactly one approved read-only tool on an active, provider-verified, operator-curated public MCP server registered in 404.directory. First use search_tools to select a server, then inspect_tool_server to obtain the current tool na…
- `compare_tools` — Compare up to 5 ecosystem tools side-by-side (capabilities, trust dimensions, usage).
- `get_capability_graph` — Return a Capability Graph snapshot (nodes, shared-capability edges, capability index) for agent planning.
- `get_tool` — Fetch one registered ecosystem tool by id or slug, including trust profile and usage stats.
- `get_trust_score` — Return the machine-readable Trust Profile for a catalog tool (ownership, availability, compatibility, security, usage).
- `inspect_tool_server` — Live-inspect one active, provider-verified, operator-curated public MCP server from the 404.directory catalog. Returns only the remote read-only tools approved for gateway execution, including their current descriptions, JSON input schem…
- `list_capabilities` — List capabilities in the 404 catalog with tool counts. Use to explore the Capability Graph before searching.
- `recommend_tools` — Given one known tool, recommend similar catalog tools via the Capability Graph (shared capabilities + protocol/category affinity).
- `search_official_docs` — Search current first-party OpenAI, Microsoft Learn, AWS, and Cloudflare documentation in one call. Use this as the default documentation research tool for questions involving any of those providers, especially comparisons or cross-cloud …
- `search_tools` — Search the 404.directory ecosystem catalog by capability, protocol, category, or trust threshold. Use before choosing a third-party tool. Does not execute tools.

## Related servers

- UnClick (1662 tools) — https://policylayer.com/tools/io-github-malamutemayhem-unclick-mcp-server.md
- Apibase (1384 tools) — https://policylayer.com/tools/io-github-whiteknightonhorse-apibase.md
- Delx Mcp A2a (1068 tools) — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-a2a.md
- MCP Framework Personal (912 tools) — https://policylayer.com/tools/inggerman-mcps.md
- Hermoso (896 tools) — https://policylayer.com/tools/hermoso.md
- Nodebench (824 tools) — https://policylayer.com/tools/io-github-homenshum-nodebench.md
- Altium-MCP-Suite (817 tools) — https://policylayer.com/tools/altium-mcp-suite.md
- Eda Agent (777 tools) — https://policylayer.com/tools/eda-agent.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`

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Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=404-directory · API: https://policylayer.com/registry/api · Recommended policies for every tool: https://policylayer.com/policies/404-directory