construction-cost-data

MCP serverDev tools

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

Available today. Use it from your connected AI after setup.

No other account needed.

Add ahel to your AI once: Claude, ChatGPT, Cursor, Claude Code or Codex. Then ask it to use this.

Then ask your AI: use construction-cost-data to search jccdb items

Install construction-cost-data

The server’s own address, for the clients that take one directly. Or connect ahel once and every client you use reads it from one address, with the account kept on ahel rather than in each client’s config.

Claude Code
claude mcp add --transport http --scope user construction-cost-data 'https://ccdb.horizonshield.dev/mcp'
Run it once in your project, then open /mcp to approve any sign-in the server asks for.
Claude Desktop
https://ccdb.horizonshield.dev/mcp
Add a custom connector in Settings, paste this address, and approve the sign-in.
Cursor
cursor://anysphere.cursor-deeplink/mcp/install?name=construction-cost-data&config=eyJ1cmwiOiJodHRwczovL2NjZGIuaG9yaXpvbnNoaWVsZC5kZXYvbWNwIn0=
Open the link and Cursor adds the server at that address.
ChatGPT
https://ccdb.horizonshield.dev/mcp
In Settings, enable Developer mode, create an MCP app, and paste this address. Your plan and workspace must allow custom apps.
Codex
codex mcp add construction-cost-data --url 'https://ccdb.horizonshield.dev/mcp'
Run it once, then sign in with codex mcp login construction-cost-data if the server asks for an account.

From the project's README

As published by ogasurfproject-jpg/horizon-shield in README.md. This repository publishes several servers, so only the opening is shown here.

Verifiable construction estimate auditing for AI agents

Don't trust the estimate. Verify it.

An MCP server that lets AI agents check whether a Japanese construction or renovation estimate is fair, against open data, and returns a result anyone can verify against Bitcoin (OpenTimestamps). No account, no key.

[](https://github.com/ogasurfproject-jpg/hor

Shortened here. Read the whole README on GitHub.

Tools it offers (15)

What this server listed when ahel dialed its public endpoint in Oct 2026, with no key and no account of yours. The names are the server’s own.

search_jccdb_items
get_jccdb_observations
get_jccdb_labor_rate
compare_jccdb_regions
get_jccdb_work_unit_price
get_jccdb_index_series
get_us_construction_prices
get_jccdb_coverage
get_us_prevailing_wage
get_us_permits
get_us_area_factor
get_us_price_chain
get_us_import_landed_cost
get_us_trade_margins
get_us_contract_discounts

Signals

GitHub stars: 1
Forks: 1
Last commit: Oct 2026

Advanced

Delivery: construction-cost-data MCP server → your ahel connector (mcp.ahel.ai) → your AI.
Item type: mcp-server
Key: io-github-ogasurfproject-jpg-construction-cost-data
Source: github.com/ogasurfproject-jpg/horizon-shield
Hosted endpoint: https://ccdb.horizonshield.dev/mcp

github.com/ogasurfproject-jpg/horizon-shield

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