HORIZON SHIELD: Construction Estimate Auditor for Japan (KIRA)

io.github.ogasurfproject-jpgPublished by GitHub account ogasurfproject-jpgv1.0.4Updated Nov 2, 2026

Agent intake desk for property renovation. Read only, CORS open, fail closed, receipts recompute.

VerifiedStreamable HTTPWeb executableFinanceBusiness & Commerce

Overview

AI-generated overview

Remote MCP server that lets an assistant check whether a Japanese construction or renovation quote is fairly priced against an open cost database.

What you can do
  • Audit a homeowner's quote: pass a work type and optional price in JPY to get a fair-price verdict and what to ask the contractor
  • Look up verified overcharge tactics for a work type, with pointers to primary sources
  • Run intake, tactic scan and broadcast draft in one bundled call
  • Generate awareness drafts (long-form and short) with backlinks to explanatory pages
  • Read reference resources and templates on the dataset, work categories, price ranges and the free review board
When to use it
Useful when a user asks whether a Japanese building or renovation quote is reasonable, wants to know common overcharge patterns for a trade, or needs a draft warning post about a pricing issue. It is Japan- and JPY-specific and read-only.
Requirements
A remote streamable HTTP endpoint; no API key is required. The README suggests connecting through the mcp-remote bridge via npx, which needs Node.js locally. Data covers Japan and JPY only.
Before you install
Verdicts are advisory and the server says it does not give a bare too-high or too-low answer; treat them as guidance, not a professional appraisal. Broadcast output is a draft only and is not auto-posted, so a person must review and publish it. Quote details a user supplies are sent to the operator's endpoint.

Installation

In SourceWeft

  1. Open HORIZON SHIELD: Construction Estimate Auditor for Japan (KIRA) in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/io.github.ogasurfproject-jpg%2Fhorizon-shield-webmcp/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "horizon-shield-construction-estimate-aud": {
      "type": "http",
      "url": "https://web.horizonshield.dev/mcp"
    }
  }
}

README

HORIZON SHIELD — Construction Estimate Auditor for Japan (KIRA)

A Model Context Protocol (MCP) server that lets an AI agent check whether a Japanese construction or renovation quote is fair — auditing it against an open 95,403-item cost database, flagging known overcharge tactics, and returning a verifiable, tamper-evident result. Neutral third party. No referral fees. No auto-posting.

WebMCP Intake (KIRA) is the public intake desk of HORIZON SHIELD. A homeowner commissioning construction work cannot reliably tell whether a quote is honest — a textbook credence-good problem. This server makes a neutral, third-party fair-price audit callable as a tool, so an agent can check a number instead of trusting it.

  • Protocol: Model Context Protocol (MCP), streamable HTTP
  • Endpoint: https://web.horizonshield.dev/mcp
  • Access: read-only, no API key required
  • Data region: Japan (JPY) — built on the open JCCDB dataset (95,403 line items) + 61 curated work categories
  • Supervision: 30 years of construction field experience (Toshikatsu Oga, ORCID 0009-0000-9180-903X)
  • Operator: THE HORIZONS INC — independent, takes no referral fees or kickbacks from contractors

What it does

Give it a work type (e.g. 外壁塗装 / exterior wall painting) and, optionally, the quoted price in JPY. It returns a fair-price verdict, flags known overcharge tactics with primary-source citations, and can draft public awareness content — all from verifiable first-party data, never guessed numbers. It never pressures, never auto-posts, and never gives a bare "too high / too low"; it hands you what to ask the contractor.

Tools

ToolWhat it does
orchestrateStart here. One call runs intake + tactic-scan + broadcast-draft together and returns a single bundle. The fastest way to see the whole server.
intake_estimateBridges a homeowner's quote (work + price in JPY) to the KIRA fair-price audit; returns a verdict plus a path to a free third-party check (EHN).
scan_tacticsReturns verified overcharge tactics for a given work type, with pointers to primary sources (Japan Consumer Affairs Agency, NCAC, the EHN case board). Awareness, not a price verdict.
draft_broadcastGenerates awareness drafts (long-form for note, short for X) with real backlinks. Verifiable first-party prices only; draft only — the operator finalizes. No auto-posting.

Try it (example prompts)

Once connected, ask your agent:

  • 外壁塗装の見積もりが120万円。適正か診断して → runs intake_estimate
  • Is a ¥1,200,000 exterior-wall-painting quote fair for a Japanese house? → intake_estimate
  • シロアリ駆除でよくある過剰請求の手口を教えて → scan_tactics
  • Run the full HORIZON SHIELD check on 屋根塗装, quoted ¥900,000 → orchestrate

Resources & prompts

Resources: about-horizon-shield, jccdb-dataset-info (95,403 items, license + citation), souba-categories (61 work categories), souba-sources (fair-price sources + regional multipliers), ehn-info (free anonymous estimate-review board). Resource templates: souba://category/{query} (category search), souba://price/{work} (fair price range: min / avg / max). Prompts: diagnose_my_estimate, how_to_read_an_estimate.

Connecting

This is a remote MCP server — point any MCP client at the endpoint:

json
{  "mcpServers": {    "horizon-shield-intake": {      "command": "npx",      "args": ["-y", "mcp-remote", "https://web.horizonshield.dev/mcp"]    }  }}

Why trust it

  • Neutral third party. Takes no referral fees or send-off rewards from contractors.
  • Verifiable. Fair prices are returned as tamper-evident records with a SHA-256 hash, under a Pre-Transaction Knowledge Anchoring model (a third party records the fair price before the contractor's quote).
  • Open data. Built on the public JCCDB dataset (95,403 line items) plus 61 curated categories with maintained price ranges and red flags.
  • No pressure, no auto-posting. It returns what to ask, points to primary sources, and never publishes on its own.

Version numbering, and a correction

The version in server.json, which is what the MCP registry publishes, and the version this server reports in serverInfo were two different numbers for most of this server's life.

2026-08-03   serverInfo 0.5.02026-08-09   serverInfo 0.5.0, server.json 0.4.12026-08-09   server.json published to the registry as 1.0.22026-09-04   serverInfo 0.6.0, server.json and the registry still 1.0.2

Measured on 2026-09-04 against the live endpoint: serverInfo.version came back 0.6.0 while the registry said 1.0.2. The other four servers in this repository keep the two numbers equal, so this one was the exception rather than the rule, and the exception was written down nowhere.

Registry versions cannot go backwards, so 0.6.0 could not be published to correct it. Both numbers were moved forward to 1.0.3 instead, and the period during which they disagreed is recorded here rather than removed. Found by a full sweep of every server in this repository, prompted by the same class of drift on hs-verify-gate (PR #17) and hs-hearing (PR #18), where the code was ahead of the registry rather than behind it.

Links

Keywords

construction estimate, renovation quote, home improvement, fair price, overcharge detection, cost verification, contractor quote, price benchmark, Japan, JCCDB, 見積もり, 外壁塗装, 屋根塗装, リフォーム, 過剰請求, 相場, 適正価格, consumer protection, credence good.

Source: workers/hs-webmcp/README.md at commit 21012e4

Tools

5

route_request

一文で聞けば、正しい窓口に繋ぐ

Check whether a construction or renovation quote in JAPAN is fairly priced, against the open JCCDB (526,128 records: line items and observations) and Bitcoin-anchored verification records. Single entry point: pass one sentence. USE WHEN: the user has a quote or a price for building/renovation work in Japan and wants to know if it is reasonable; or wants to check a HORIZON SHIELD receipt or a jidec: citation; or asks about overcharging tactics used by contractors; or is looking for a verified contractor. DO NOT USE WHEN: the work is outside Japan; the question is not about construction or renovation; the user has already signed or paid and needs consumer-protection help; or there is an active emergency (gas smell, collapse, water not stopping). In those cases this tool does not answer - it returns the appropriate outside destination instead, and says so. Every reply carries verify (a URL that checks the answer) and limits (what the answer does NOT prove). Routing is a deterministic keyword table, not an LLM, so the same input always routes the same way. Examples: "is 800,000 yen high for exterior wall painting?" / "is jidec:entry:9 genuine?" / "how do I refuse a door-to-door sales pitch?" 日本の建設・リフォーム見積もりが適正かを確認する単一入口。日本語の一文で渡してよい。適正診断・台帳(JIDEC)の記録検証・過剰請求の手口・検証済み加盟店の4方向へ決定的に振り分ける。日本国外/建設以外/契約後の紛争/緊急時は**答えずに適切な外部の窓口を返す。**返り値には必ず verify(検証URL)と limits(証明していないこと)が入る。

Parametersaskrefworkamount

run_full_audit

集客→診断→発信 一括実行

1回の呼び出しで HORIZON SHIELD の集客→診断→注意喚起→発信を一気通貫で回す司令塔。work(と任意の quoted_price)を渡すと、内部で intake(KIRA適正診断)・scan_tactics(検証済み手口+一次ソース)・draft_broadcast(発信下書き+被リンク)を順に実行し、結果を1つに束ねて返す。価格は検証可能な一次データのみ。発信は下書きで自動投稿しない。 / One-call orchestrator returning audit + tactics + broadcast draft. Verifiable first-party prices only. Drafts only, no auto-posting. USE WHEN: the caller wants all three steps (audit, tactics, broadcast draft) for one named work item in a single call and will act on the combined result. DO NOT USE WHEN: only one step is needed. Call intake_estimate for a verdict on a specific quote, scan_tactics for the documented overcharge tactics, or draft_broadcast for publishable text. If the request is still a free-form question with no work item, call ask first. This tool never posts anything.

Parametersworkrequiredquoted_price

intake_estimate

見積もり適正診断(KIRA)

施主の建設・リフォーム見積もりを受け付け、HORIZON SHIELD KIRA(内部・中立)の適正価格診断へ橋渡しする集客窓口。工事名と業者提示額を渡すと、適正かどうかの判定と、無料の第三者チェック(EHN)への導線を返す。価格の断定はせず、確認すべき点を渡す。 / Intake desk: bridges a homeowner quote to the KIRA fair-price audit and returns the verdict plus a free third-party check (EHN) path. USE WHEN: a homeowner has a specific quoted price for a named construction or renovation work item in Japan and wants to know whether that price is reasonable. DO NOT USE WHEN: there is no price yet (call ask), the caller wants the known overcharge tactics rather than a verdict on their own quote (call scan_tactics), or the caller wants publishable text (call draft_broadcast). Returns a verdict and a free third-party check path. It does not draft or post.

Parametersworkrequiredquoted_pricerequired

scan_tactics

過剰請求の手口スキャン

ある工事・キーワードに関する『過剰請求の手口』を、HORIZON SHIELD(大賀俊勝30年監修)の検証済みデータ(内部KIRA)から返し、一次ソース(国民生活センター/消費者庁/EHN実例ボード)の在処を添える。価格判定ではなく注意喚起。推測で新事例を断定しない。 / Returns verified overcharge tactics and points to primary sources. Awareness, not a price verdict. USE WHEN: the caller wants the documented overcharge tactics for a work type or keyword, together with their primary sources. DO NOT USE WHEN: the caller has their own quote and wants a verdict on it (call intake_estimate), or wants publishable text (call draft_broadcast). This returns awareness material and never a price verdict on a specific quote.

Parametersworkrequired

draft_broadcast

注意喚起の発信下書き

ある工事の過剰請求への注意喚起を発信する下書き(note用長文・X用短文)を生成し、HORIZON SHIELDの該当解説ページ(実在URL)への被リンクを添える。価格はKIRA(検証可能SHA-256付き)の一次データのみ。推測の数字は入れない。下書きであり公開前に運営者が最終版にする(自動投稿しない)。 / Generates broadcast DRAFTS with backlinks. Verifiable first-party prices only. Draft; operator finalizes. No auto-posting. USE WHEN: the operator wants note/X draft text warning about overcharging for a given work type. DO NOT USE WHEN: the caller wants a verdict on a specific quote (call intake_estimate) or the tactic list itself (call scan_tactics). Output is a DRAFT for a human to finalise. This tool never posts.

Parametersworkrequired

Version history

1
  1. v1.0.4LatestSep 16, 2026

Score

100% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts
  • DescriptionRequired15 pts
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  • Documentation15 pts
  • License10 pts