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b612 (hakuto AI) MCP Server

by hakuto-0209 Your server? Claim it
not responding

b612 (hakuto AI) is listed as active in the registry but did not answer our last check. It exposes 8 tools.

Design-review copilot: industry design checkpoints, edge cases, and Japanese legal notes.

Uptime history 10 days of history · worst day 0%
10 days agonow
0.0%
Uptime 24h
0 of 92 checks
8
Tools
read from the server
43 ms
Response time
average over 24h
open, no key
Access
streamable-http

b612 (hakuto AI) does not always answer

Over the last week it answered 0.0% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.

Three servers free · no card

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 0 min ago.

run in your terminal
claude mcp add b612 --transport http https://mcp.hakuto-0209.com/mcp
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "b612": {
      "url": "https://mcp.hakuto-0209.com/mcp"
    }
  }
}
~/.codex/config.toml
[mcp_servers.b612]
url = "https://mcp.hakuto-0209.com/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "b612": {
      "url": "https://mcp.hakuto-0209.com/mcp"
    }
  }
}
.vscode/mcp.json
{
  "mcpServers": {
    "b612": {
      "url": "https://mcp.hakuto-0209.com/mcp"
    }
  }
}

Available tools 8

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

b612
b612_design
ホームページ・LP・UI・チラシを作る前に必ず引く。生成AIが出しがちで顧客に「AIくさい」と言われる形（注記の左に色の縦棒・器と同じ色の面・均一な3列カード・全部同じ角丸と影）の禁止事項と、カードは角張らせる・並びの間隔は親のgapで持つ・複雑なSVGは無料素材を使う、などの必須事項を返す。あわせて、放っておくと生成AIが出さない6つ（斜めの帯・斜めの文字・派手なCTA・追従CTA・写真の上の文字・飾りの浮遊）と、そのまま貼れるCSS/JSの一覧を返す。snippet に名前を渡すとその実装を全文返す。
b612_domain_preset
業種/ドメイン別の必須モデル・エッジケース・必須法令・アンチパターンを返す。対応ドメイン: accounting, ai-chat, ai-content-ops, android, beauty, blog, booking, chat, community, corporate, corporate-story, crm, ec, event, fukushi, game, healthcare, hr, instagram, inventory, ios, line, llmo, lms, lp, pos, project, rag, realestate, restaurant, retrogame, saas, seo, subscription, survey, task
b612_notes
利用者が hakuto の公式LINE に送ったメモを読み込む。「今日のメモをまとめて」「昨日のメモ見せて」「今週のアイデア整理して」などと言われたらこれを使う。days で遡る日数を指定する（既定は1＝今日ぶん）。返ってくるのは日付ごとに並べた生のメモ。要約・分類・タスク化は、この結果を読んで自分で行うこと。
b612_patterns
b612 の実戦ノウハウ（典型エラー・推測実装の傾向・過去に効いた意思決定）を返す。案件固有名は含まない公開版。全文は約88,000字あるため、既定は見出し索引のみを返す。query に検索語を渡すと一致した節だけを返す（推奨）。
b612_principles
b612 メソッドの思考の核（NO SPECULATION・実装前の3問自問・5原則・握りつぶし禁止）を返す。レビューや実装を始める前に読み、原則に沿って進めること。
b612_review_checklist
対象の種類に応じた b612 のレビュー観点を返す。返ってきた観点を使って呼び出し側の AI が実レビューを行う。対応: lp, hp, ec, api, saas, game, form, generic
b612_rules
コードに当てる検出ルール（ID・重大度・なぜ危険か・直し方）の一覧を返す。**呼び出し側の AI がこのルールを手元のコードに当てて検査する**（コードは b612 サーバーに送らない）。握りつぶし / 秘密の直書き / 0行更新の見逃し / タイマー多重起動 / 印刷崩れ / 破壊的SQL / XSS 等。ルールID: swallow-empty-catch, swallow-catch-comment-only, swallow-nullish-default, swallow-nullish-any, supabase-update-without-select, hardcoded-secret, console-log-secret, raf-loop-not-idempotent, setinterval-no-clear, top-level-sdk-client, next-force-dynamic, print-transform-scale, global-element-selector, img-no-dimensions, destructive-sql, bulk-update-no-where, dangerous-html, eval-use, mcp-stdout-log, line-postback-encode, dark-body-light-surface, print-white-text, last-child-visual, aspect-ratio-with-object-position, tap-target-too-small, leftover-min-height, overflow-hidden-full-height, empty-element-no-fallback, fail-open-secret-check, charge-before-persist, fetch-result-ignored
b612_update
b612 のアップデート。エージェント・法令ファイル・業種プリセット・雛形・参照ドキュメントを最新に更新する手順を返す。「b612 をアップデートして」「b612 を最新にして」と言われたらこれを使う。返ってきたコマンドを実行すると、手元と違うファイルだけが置き換わる（既存は .bak を残す）。新しい専門エージェントが増えたときや、法令が改正されたときに実行する。

Endpoints

URLTransportStateLatencyChecked
https://mcp.hakuto-0209.com/mcp streamable-http answering 43 ms 0 min ago

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b612 (hakuto AI) — questions

Answers built from our own checks of this server.

What can b612 (hakuto AI) do?
It exposes 8 tools, read directly from the server on our last check. Among them: b612_design, b612_domain_preset, b612_notes, b612_patterns, b612_principles, b612_review_checklist and 2 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →
Is b612 (hakuto AI) working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 0 of 92 checks got a reply (0.0%), average response time 43 ms. The bar chart above shows every period we have measured.
The registry lists b612 (hakuto AI) as active — why does it not respond?
The official MCP registry stores what the author submitted; it does not verify that the server still runs. We check the endpoint ourselves, and this one does not answer. Catalogues that copy the registry without checking will show it as working.
How do I connect b612 (hakuto AI)?
Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does b612 (hakuto AI) need an API key?
No. b612 (hakuto AI) completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 8 of them are readable on this page. This is what we observed, not what the docs claim.