About io.github.ogasurfproject-jpg/horizon-shield
io.github.ogasurfproject-jpg/horizon-shield is an MCP server published by ogasurfproject-jpg in the Developer Tools category: checks if a Japanese construction or renovation estimate is fair and flags overcharge risk.
The repository has 2 stars and 7 forks, with the last commit just now. Recent commit activity is the strongest signal that reported issues will get attention.
Install
git clone https://github.com/ogasurfproject-jpg/horizon-shieldThis server has no ConduID identity, so agent calls to it are not receipted. Pin the version you install and review the source before granting it credentials.
Tools (14)
audit_estimateGiven a work name and a quoted price in JPY, judges it as fair, a bit high, or overcharge risk, and returns the gap from the average.
Parameters not published.
check_red_flagsChecks whether wording in an estimate or sales pitch matches known overcharge or high pressure tactics (lump sum, today only discount, free inspection, door to door). Language agnostic.
Parameters not published.
create_ap2_fairness_attestationIssues a FairPriceAttestation shaped to attach to a Google AP2 (Agent Payments Protocol) Cart Mandate, so a fair price proof can ride alongside the payment authorization. Optional `quoted_price` adds a within / above / below verdict.
Parameters not published.
find_verified_contractorFinds verification-passed contractors on Yakumo, where listing depends only on passing the KIRA fairness audit and no referral or listing fee is taken. Scores and tiers, never prices; returns 0 honestly when nothing matches.
Parameters not published.
get_agent_cardReturns the A2A Agent Card URL and published skills for agent to agent discovery.
Parameters not published.
get_estimate_reading_guideReturns universal principles for judging whether any estimate is honest: the overhead ratio, how to treat lump sum entries, how to spot pressure tactics. Language agnostic.
Parameters not published.
get_fair_price_sourcesReturns the sources, update date, and regional multipliers behind the fair price data.
Parameters not published.
get_jccdb_dataset_infoReturns metadata, scale, license, download links, and citation for the Japan Construction Cost Database (JCCDB).
Parameters not published.
get_price_rangeReturns the fair price range (min, avg, max), the overcharge danger threshold, unit, price trend, and field notes for a Japanese construction or renovation job.
Parameters not published.
list_cost_categoriesLists the construction and renovation work categories for which fair price ranges and red flags are maintained.
Parameters not published.
Show all 14 tools
preview_reverse_estimateReturns only the direction of a rough estimate versus the average (for example about +20 percent), before a detailed breakdown exists.
Parameters not published.
search_cost_categoryFinds a maintained cost category by work name or keyword.
Parameters not published.
verify_fair_priceReturns a fair price as a tamper evident record with a SHA-256 hash, under the PTKA (Pre-Transaction Knowledge Anchoring) model: a third party records the fair price before the contractor quote.
Parameters not published.
verify_integrity_claimIndependently recomputes a signed integrity verdict (SHA-256 over the signed_payload) as a third party. Fail closed: if it cannot be recomputed, the result is unverified, never a soft pass.
Parameters not published.
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