404.directory

Connect Remote server

claude mcp add --transport http 404-directory https://404.directory/mcp --header "X-404-Agent-ID: <X_404_AGENT_ID>" --header "X-404-Source: <X_404_SOURCE>"

{
  "mcpServers": {
    "404-directory": {
      "url": "https://404.directory/mcp",
      "headers": {
        "X-404-Agent-ID": "<X_404_AGENT_ID>",
        "X-404-Source": "<X_404_SOURCE>"
      }
    }
  }
}

{
  "servers": {
    "404-directory": {
      "type": "http",
      "url": "https://404.directory/mcp",
      "headers": {
        "X-404-Agent-ID": "<X_404_AGENT_ID>",
        "X-404-Source": "<X_404_SOURCE>"
      }
    }
  }
}

Settings > Connectors > Add custom connector
URL: https://404.directory/mcp

Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.

Tools 16 found in our last check

• 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 web search when the question is what is on a page, what state it is in, or what…

• 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 / escalate decisions. When to use: Use when the user explicitly asks to verify a depl…

• 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 again when permissions, data sensitivity, execution mode, or evidence changes. The…

• 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 outcome token returned by the evaluation; never include prompts, arguments, outpu…

• 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, timing boundaries, order-book depth, spread, slippage, geographic eligibility, or…

• 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 an execution failure. Submit only the bounded enums and one-time token returned…

• 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, capability, category or provider; exact names rank first. Protocol, capability, categor…

• 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, especially comparisons or cross-cloud architecture. Select only relevant sources…

• 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 schemas, and annotations. Use after search_tool…

• 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 name and input schema. This gateway rejects…

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• Live Sports Scores & Betting Odds MCP Server

  Keyless sports scores, betting odds, injuries & news: NFL NBA MLB NHL soccer. No API key.

• Knowra

  Search arXiv papers and read Scout reports with methods, evidence and verification points.

• Contract Compass

  Korean public procurement law: rule-engine rulings, statutes search, live court precedents

• Korea Realty

  Korean real estate: court auctions, 10M+ MOLIT records, subscription notice facts, loan/DSR rules

• 校招宝 · 中国校园招聘岗位数据

  中国校园招聘（秋招/春招/实习/提前批）在招岗位、企业档案、投递截止与求职攻略数据。免 API Key、免注册、只读。

• IBDÅ

  Ask about IBDÅ, a design-led R&D and innovation studio in Dubai, and prepare a project enquiry.