HORIZON SHIELD Construction Cost Data: JCCDB (Japan) and USCCDB (United States)

io.github.ogasurfproject-jpgv1.0.0Updated Oct 2, 2026

Public construction cost data for Japan and the U.S., each row with its source URL and licence.

VerifiedStreamable HTTPWeb executableBusiness & CommerceData & Analytics

Overview

AI-generated overview

Remote MCP server giving assistants public construction cost data for Japan (JCCDB) and the United States (USCCDB), each row with source URL and licence.

What it does
Exposes read-only lookup tools over public construction cost datasets. Japan tools cover line items, source-cited observations, MLIT public-works design labor rates by prefecture and trade, regional comparisons, work unit prices, cost index series, and a coverage check. U.S. tools cover public prices across layers, Davis-Bacon prevailing wages, Census permits, DoD area cost factors, price chains from landed import to contractor, trade margins, and contract discounts. Every row carries its source URL and licence; computed values are flagged and failed lookups return fetch_failed rather than empty results.
When to use it
Use it when an assistant needs cited reference figures on Japanese or U.S. construction costs: checking public-works unit prices, labor rates, prevailing wages, permits, indexes, or import and margin chains. It is reference data, not a renovation quote, so treat outputs as inputs to further analysis.
Requirements
A remote Streamable HTTP endpoint at No API key, authentication, environment variables, or headers are declared, and no local package is needed; network access to the endpoint is required.
Before you install
The server is read-only and asks for no credentials, so no secrets are transmitted. Values it computes are marked computed:true and should be distinguished from cited source rows. Public-works unit prices, statistics, and chain estimates are reference data, not renovation quotes, and should not be presented as binding prices. The README notes the data tools were moved from another server and may still answer there.

Installation

In SourceWeft

  1. Open HORIZON SHIELD Construction Cost Data: JCCDB (Japan) and USCCDB (United States) 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.

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "construction-cost-data": {
      "type": "http",
      "url": "https://ccdb.horizonshield.dev/mcp"
    }
  }
}

README

HORIZON SHIELD Construction Cost Data (JCCDB + USCCDB)

An MCP server (Streamable HTTP, stateless, no key) for public construction cost data:

Endpoint: https://ccdb.horizonshield.dev/mcp

ToolWhat it returns
search_jccdb_itemsJCCDB line items by name, with evidence URLs
get_jccdb_observationsWhere and when an item appears in public documents, with its price or the reason it is not public
get_jccdb_labor_rateMLIT public-works design labor rates by prefecture and trade
compare_jccdb_regionsLatest value per region for the same item, spec and unit
get_jccdb_work_unit_pricePublic-works unit prices for work items, with composition rows
get_jccdb_index_seriesConstruction cost index series with year-over-year change
get_jccdb_coverageWhat exists and what does not, before answering
get_us_construction_pricesU.S. public data across layers (wages, bids, equipment, indexes, permits, cost limits)
get_us_prevailing_wageDavis-Bacon base and fringe by state, county and trade
get_us_permitsCensus building permits and city permit valuations
get_us_area_factorDoD Area Cost Factors and USACE state adjustments
get_us_price_chainA material's price from landed import cost to wholesale, retail and contractor
get_us_import_landed_costLanded import cost by HS code and partner country
get_us_trade_marginsWholesale and retail gross margins and the BEA margin structure
get_us_contract_discountsPublic contract discounts off list price

Every row carries its source URL and licence. Values this service computes are marked computed:true. A lookup that could not be made comes back as fetch_failed:true, never as zero rows. Public-works unit prices, statistics and chain estimates are reference data, not renovation quotes.

To check whether a Japanese renovation quote is fair, use the HORIZON SHIELD server: https://mcp.horizonshield.dev/mcp. The two servers were one until 2026-10-02; the data tools moved here so each server does one job. The moved tools still answer on the old server for now, with a pointer here.

The tool definitions are generated from what the old server served (build/build_worker.py, build/data_tools.json), so names, descriptions and schemas did not change in the move. Test, offline: node test/ccdb.test.mjs.

Source: workers/hs-ccdb-mcp/README.md at commit 7e74b2e

Tools

0
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Version history

1
  1. v1.0.0LatestOct 2, 2026