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MCP live MCP 2025-11-25 streamable-http

404.directory

io.github.mm-sheng/404-directory

Risk preflight for AI Agent tool actions and Polymarket settlement and execution checks.

Uptime
100.0%
3 direct probes · 30d
Response
3718ms
last probe
Tools
16
callable
Resources
0
readable
Prompts
4
available
Primary URL
https://404.directory/mcp

Tools · 16

understand_webpage

Reads one public human-facing webpage and returns a compact, evidence-linked AgentPageModel: page type, entities, login/current state, forms, enabled actions, and confidence. Prefer this over generic …

verify_web

Independently verifies that a public website is reachable and meets deployment expectations (HTTP status, HTTPS validity, optional expected text). Returns structured evidence for accept / retry / esca…

evaluate_tool_risk

Make a contextual allow, review, or block decision before an AI Agent installs or invokes a third-party tool registered in 404.directory. Use this immediately before installation or first use, and aga…

report_tool_outcome

Close the feedback loop for one prior evaluate_tool_risk receipt. Call after the Agent proceeds, changes tools, requests review, or aborts. Submit only the bounded action/result fields and one-time ou…

evaluate_prediction_market

Evaluate one specific Polymarket market before an AI Agent observes or contemplates buying or selling a Yes/No position. Use immediately before a decision when settlement wording, source ambiguity, ti…

report_prediction_market_outcome

Close the behavioral feedback loop for one prior evaluate_prediction_market receipt. Call after the Agent proceeds, reduces position size, changes side, waits, requests review, aborts, or encounters a…

search_tools

Find third-party catalog tools using short provider/capability keywords, for example 'official documentation' or 'OpenAI docs'. All meaningful query terms must match across name, description, capabili…

get_tool

Fetch one registered ecosystem tool by id or slug, including trust profile and usage stats.

compare_tools

Compare up to 5 ecosystem tools side-by-side (capabilities, trust dimensions, usage).

get_trust_score

Return the machine-readable Trust Profile for a catalog tool (ownership, availability, compatibility, security, usage).

recommend_tools

Given one known tool, recommend similar catalog tools via the Capability Graph (shared capabilities + protocol/category affinity).

list_capabilities

List capabilities in the 404 catalog with tool counts. Use to explore the Capability Graph before searching.

get_capability_graph

Return a Capability Graph snapshot (nodes, shared-capability edges, capability index) for agent planning.

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, e…

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 c…

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…

Prompts · 4

preflight-prediction-market

Evaluate one real Polymarket observation or contemplated Yes/No action for settlement, liquidity, eligibility, and execution risk.

research-official-docs

Answer a real technical question with current first-party OpenAI, Microsoft Learn, AWS, or Cloudflare sources.

verify-public-deployment

Check a concrete public deployment claim with structured HTTP, TLS, redirect, or exact-text evidence.

evaluate-agent-tool

Find an MCP tool for a real requirement, then make a contextual allow, review, or block decision before installation or invocation.

How to use

Add to your Claude Desktop / Cursor / Cline MCP config:

{
  "mcpServers": {
    "404.directory": {
      "url": "https://404.directory/mcp",
      "transport": "streamable-http"
    }
  }
}