The HORIZ音s株式会社 (The HORIZONs Co., Ltd., Hiratsuka, Kanagawa) operates HORIZON SHIELD, a buyer-side, agent-native fair-price verification service for Japanese construction and renovation estimates, built by a 30-year master carpenter on the open JCCDB dataset (95,403 items, CC BY 4.0). Its flagship KIRA server at mcp.horizonshield.dev is a free, anonymous remote MCP server (15 tools, 5 prompts) and A2A agent that audits a quoted price against fair ranges, flags overcharge tactics, and issues SHA-256 receipts anchored to Bitcoin via OpenTimestamps; a FairPriceAttestation tool bridges to Google's AP2 Cart Mandate. Around it sit a public MCP Verification Gate (the family's one OpenAPI, plus MCP and A2A) that measures other people's MCP servers against an A2A Conduct Extension the company authors, the JIDEC append-only verification ledger with an RFC 9727 api-catalog, the Yakumo verified-contractor directory MCP, a WebMCP intake server and a femtech source registry — every card JWS-signed, every surface unauthenticated by design, and paid for by buyers rather than contractors.
HORIZON SHIELD publishes 28 API contracts indexed on the APIs.io network, including Badge API, Changes API, Check API, and 25 more. Tagged areas include Construction, Renovation, Cost Estimation, Fair Pricing, and Consumer Protection.
HORIZON SHIELD’s developer surface includes documentation, API reference, getting-started guide, engineering blog, support, pricing, authentication, and 34 more developer resources.
Regulatory Posture applies to this provider. Its tags matched the
Government & Public Sector regime, so
Regulatory Posture carries 15 points of the composite.
If this regime is wrong for your business, say so on your
provider repo — the
applicability map is public and we will correct it.
Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for
this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero:
never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and
several others — scorable at all.
The six quality facets above are damped to 85 points between them,
because the conditional facet above carries the other
15. That is why each facet's contribution is shown against a damped
maximum: raising a quality facet moves the composite by 85% of its nominal
weight, not 100%. The full arithmetic is at apis.io/rating/.
Show this score on your site.
It updates itself when the score changes. Paste this where you link to your API docs:
<a href="https://apis.io/providers/horizonshield-dev/"><img src="https://apis.io/badge/horizonshield-dev/card.svg" alt="HORIZON SHIELD on APIs.io — Kin Score by API Evangelist"></a>
Other styles, a README pill and a shields.io endpoint are on the badge page.
Raise your score.
Agent readiness — checks not met, largest first (exact, from this profile):
Idempotency+9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
Request/Response Examples+7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
Delegated User Identity+6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented)
The Kin Score Market layer reads a provider inside its market:
its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted:
not part of the Kin Score or agent readiness.
Registered MCP server and declares compatibility are report only — not weighted.
Undeclared means we found nothing we can read, so there is no number: we never infer integrations.
Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.
Remote Model Context Protocol server at https://mcp.horizonshield.dev/ (Streamable HTTP, POST only, protocol 2025-06-18, serverInfo horizon-shield 1.0.9, listed on registry.mode...
Agent2Agent surface of the same service: a JWS-signed agent card at https://mcp.horizonshield.dev/.well-known/agent-card.json (protocolVersion 0.3.0 with 1.0-style supportedInte...
Append-only, Bitcoin-anchored (OpenTimestamps) public ledger of the verification process at https://ledger.horizonshield.dev: an index of anchored entries, per-entry raw bytes a...
Remote MCP server at https://hearing.horizonshield.dev/mcp (serverInfo HORIZON SHIELD YAKUMO 2.3.1, protocol 2025-06-18) exposing six read-only tools over the Yakumo mall, where...
A second public MCP endpoint at https://web.horizonshield.dev/mcp (serverInfo hs-webmcp 1.0.4, protocol 2025-06-18; server.json published at shield.the-horizons-innovation.com/s...
A separate product line by the same company: a neutral, verifiable registry of femtech information sources exposed as a remote MCP server at https://femtech.horizonshield.dev/mc...
HORIZON SHIELD operates a FAMILY of remote MCP servers on subdomains of horizonshield.dev (the apex resolves to nothing; see well-known/). The flagship is https://mcp.horizonshi...
Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.
aid: horizonshield-dev
name: HORIZON SHIELD
description: The HORIZ音s株式会社 (The HORIZONs Co., Ltd., Hiratsuka, Kanagawa) operates HORIZON SHIELD, a buyer-side, agent-native
fair-price verification service for Japanese construction and renovation estimates, built by a 30-year master carpenter
on the open JCCDB dataset (95,403 items, CC BY 4.0). Its flagship KIRA server at mcp.horizonshield.dev is a free, anonymous
remote MCP server (15 tools, 5 prompts) and A2A agent that audits a quoted price against fair ranges, flags overcharge tactics,
and issues SHA-256 receipts anchored to Bitcoin via OpenTimestamps; a FairPriceAttestation tool bridges to Google's AP2
Cart Mandate. Around it sit a public MCP Verification Gate (the family's one OpenAPI, plus MCP and A2A) that measures other
people's MCP servers against an A2A Conduct Extension the company authors, the JIDEC append-only verification ledger with
an RFC 9727 api-catalog, the Yakumo verified-contractor directory MCP, a WebMCP intake server and a femtech source registry
— every card JWS-signed, every surface unauthenticated by design, and paid for by buyers rather than contractors.
url: https://raw.githubusercontent.com/api-evangelist/horizonshield-dev/refs/heads/main/apis.yml
image: https://shield.the-horizons-innovation.com/horizon_shield_logo_512.png
x-type: company
x-source: harvest:a2a-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-09-19 (local-v3; was a2a-registry harvest stub)
x-identity-note: The registrable domain horizonshield.dev has no A/AAAA record on any public resolver (checked 1.1.1.1, 8.8.8.8,
9.9.9.9 on 2026-09-19) and carries only MCP-registry and a2aregistry verification TXT records; every service runs on a subdomain
and the company website is https://shield.the-horizons-innovation.com/ (the provider.url in its own agent cards). Unrelated
to the cybersecurity products at horizonshield.org / horizonshield.ai, as the provider's own JSON-LD states.
specificationVersion: '0.20'
created: '2026-09-19'
modified: '2026-09-19'
tags:
- Construction
- Renovation
- Cost Estimation
- Fair Pricing
- Consumer Protection
- Verification
- Transparency Ledger
- Open Data
- MCP
- A2A
- AP2
- Agents
- Agent-Native
- Japan
tags_raw:
- Construction
- Renovation
- Cost Estimation
- Fair Pricing
- Consumer Protection
- Verification
- Transparency Ledger
- Open Data
- MCP
- A2A
- AP2
- Agents
- agent-native
- Japan
apis:
- aid: horizonshield-dev:horizon-shield-kira-mcp-server
name: HORIZON SHIELD KIRA MCP Server
description: 'Remote Model Context Protocol server at https://mcp.horizonshield.dev/ (Streamable HTTP, POST only, protocol
2025-06-18, serverInfo horizon-shield 1.0.9, listed on registry.modelcontextprotocol.io as dev.horizonshield/horizon-shield).
Anonymous: initialize, tools/list (15 tools with inputSchema, outputSchema and read-only annotations) and prompts/list
(5) need no key. Tools return fair min/avg/max price ranges and an overcharge danger threshold for 61 Japanese work categories,
audit a quoted JPY price, scan estimate wording for known high-pressure tactics, issue SHA-256 tamper-evident receipts
with a public verify URL, verify such receipts fail-closed, create an AP2 FairPriceAttestation (the one ledger-appending
tool), and look up verification-passed contractors on Yakumo. Also installable as a Claude Code plugin and a Gemini CLI
extension that connect to the same URL.'
humanURL: https://github.com/ogasurfproject-jpg/horizon-shield#readme
baseURL: https://mcp.horizonshield.dev
tags:
- MCP
- Agent-Native
- Cost Estimation
- Fair Pricing
- AP2
tags_raw:
- MCP
- agent-native
- Cost Estimation
- Fair Pricing
- AP2
properties:
- type: MCPServer
url: mcp/horizonshield-dev-mcp.yml
- type: MCPServer
name: KIRA MCP endpoint (Streamable HTTP, POST)
url: https://mcp.horizonshield.dev/
- type: ToolCrosswalk
url: mcp/horizonshield-dev-tool-crosswalk.yml
- type: Documentation
url: https://github.com/ogasurfproject-jpg/horizon-shield#readme
- type: GettingStarted
url: https://github.com/ogasurfproject-jpg/horizon-shield/blob/main/plugin/README.md
- aid: horizonshield-dev:horizon-shield-kira-a2a-agent
name: HORIZON SHIELD KIRA A2A Agent
description: 'Agent2Agent surface of the same service: a JWS-signed agent card at https://mcp.horizonshield.dev/.well-known/agent-card.json
(protocolVersion 0.3.0 with 1.0-style supportedInterfaces, JSONRPC, version 1.0.0) declaring three skills — a borderless
estimate-integrity audit, a Japan property acquisition and renovation intake routed to a licensed real-estate agent, and
fail-closed verification of a signed integrity claim — plus the provider-authored A2A Conduct Extension disclosing who
pays the agent (buyer; no referral, listing or success fee). message/send on the same JSON-RPC URL as the MCP server returned
a completed Task; streaming and push notifications are declared unsupported.'
humanURL: https://shield.the-horizons-innovation.com/
baseURL: https://mcp.horizonshield.dev
tags:
- A2A
- Agent-Native
- Verification
tags_raw:
- A2A
- agent-native
- Verification
properties:
- type: AgentCard
url: a2a/horizonshield-dev-a2a.yml
- type: AgentCard
name: A2A Agent Card (provider-hosted, JWS-signed)
url: https://mcp.horizonshield.dev/.well-known/agent-card.json
- aid: horizonshield-dev:jidec-verification-ledger-api
name: JIDEC Verification Ledger API
description: 'Append-only, Bitcoin-anchored (OpenTimestamps) public ledger of the verification process at https://ledger.horizonshield.dev:
an index of anchored entries, per-entry raw bytes and .ots proofs, citation resolution (/cite/{citation}), executable
verification recipes (/verify/{n}), anchored verification paths and replay, a witness intake for third-party conduct walks,
and agreement records. Discovery is an RFC 9727 api-catalog served as application/linkset+json, an RFC 9116 security.txt,
an llms.txt verification guide and a JWS-signed A2A card; a read-only MCP twin (4 tools) runs at https://jidec.horizonshield.dev/mcp.
The service states it is SCITT-shaped but not a conformant SCITT transparency service.'
humanURL: https://ledger.horizonshield.dev/llms.txt
baseURL: https://ledger.horizonshield.dev
tags:
- Transparency Ledger
- Verification
- Open Data
- MCP
- A2A
properties:
- type: APICatalog
url: well-known/horizonshield-dev-api-catalog.json
- type: APICatalog
name: RFC 9727 API catalog (provider-hosted linkset)
url: https://ledger.horizonshield.dev/.well-known/api-catalog
- type: LLMsTxt
url: llms/horizonshield-dev-jidec-llms.txt
- type: Documentation
url: https://ledger.horizonshield.dev/llms.txt
- type: AgentCard
name: JIDEC A2A Agent Card (provider-hosted, JWS-signed; graded in a2a/)
url: https://ledger.horizonshield.dev/.well-known/agent-card.json
- type: MCPServer
name: JIDEC read-only MCP endpoint
url: https://jidec.horizonshield.dev/mcp
- aid: horizonshield-dev:yakumo-verified-contractor-mcp
name: Yakumo Verified-Contractor Directory MCP
description: 'Remote MCP server at https://hearing.horizonshield.dev/mcp (serverInfo HORIZON SHIELD YAKUMO 2.3.1, protocol
2025-06-18) exposing six read-only tools over the Yakumo mall, where only contractors that pass the KIRA fair-price audit
are listed: list verified stores by area and trade, fetch a member profile by number, find a contractor from a free-text
need, mall overview, how verification works, and check a named contractor (returns "not measured" rather than a judgement
for non-members). Returns integrity scores and tiers, never prices; pending stores are returned separately; zero matches
are returned as zero. Its A2A card discloses paid_by seller / listing_fee true — the one seller-funded surface in the
family.'
humanURL: https://shield.the-horizons-innovation.com/yakumo/
baseURL: https://hearing.horizonshield.dev/mcp
tags:
- MCP
- Construction
- Renovation
- Verification
properties:
- type: MCPServer
name: Yakumo MCP endpoint (Streamable HTTP, POST)
url: https://hearing.horizonshield.dev/mcp
- type: AgentCard
name: Yakumo A2A Agent Card (provider-hosted; graded in a2a/)
url: https://hearing.horizonshield.dev/.well-known/agent-card.json
- type: Pricing
url: https://shield.the-horizons-innovation.com/yakumo/plans/
- aid: horizonshield-dev:webmcp-intake-server
name: HORIZON SHIELD WebMCP Intake Server
description: 'A second public MCP endpoint at https://web.horizonshield.dev/mcp (serverInfo hs-webmcp 1.0.4, protocol 2025-06-18;
server.json published at shield.the-horizons-innovation.com/server-webmcp.json) acting as an intake desk for external
LLMs and agents: route_request, run_full_audit (audit + tactics scan + awareness draft in one call), intake_estimate (bridges
a homeowner quote to the internal KIRA audit and a free EHN third-party check), scan_tactics and draft_broadcast. All
five tools are annotated read-only and idempotent.'
humanURL: https://shield.the-horizons-innovation.com/llms.txt
baseURL: https://web.horizonshield.dev/mcp
tags:
- MCP
- Agent-Native
- Cost Estimation
tags_raw:
- MCP
- agent-native
- Cost Estimation
properties:
- type: MCPServer
name: WebMCP intake endpoint (Streamable HTTP, POST)
url: https://web.horizonshield.dev/mcp
- aid: horizonshield-dev:femtech-source-registry-mcp
name: HORIZON SHIELD Femtech Source Registry MCP
description: 'A separate product line by the same company: a neutral, verifiable registry of femtech information sources
exposed as a remote MCP server at https://femtech.horizonshield.dev/mcp (hs-femtech-mcp 0.4.1) with nine tools (register
a source after machine checks of five conditions, list and fetch entries, third-party hash verification, neutral topic
and product-category explainers, how-to-verify, agent card, check a source) and a JWS-signed A2A card at /.well-known/agent-card.json.
Explicitly makes no diagnosis or efficacy claims. Source is public at github.com/ogasurfproject-jpg/hs-femtech-mcp.'
humanURL: https://github.com/ogasurfproject-jpg/hs-femtech-mcp
baseURL: https://femtech.horizonshield.dev/mcp
tags:
- MCP
- A2A
- Verification
properties:
- type: MCPServer
name: Femtech registry MCP endpoint
url: https://femtech.horizonshield.dev/mcp
- type: AgentCard
name: Femtech registry A2A Agent Card (provider-hosted, JWS-signed; graded in a2a/)
url: https://femtech.horizonshield.dev/.well-known/agent-card.json
- aid: horizonshield-dev:horizonshield-dev-badge-api
name: HORIZON SHIELD Badge API
description: The Badge API from HORIZON SHIELD — 2 operation(s) for badge.
humanURL: https://github.com/ogasurfproject-jpg/horizon-shield#readme
baseURL: https://mcp.horizonshield.dev
tags:
- Badge
properties:
- type: OpenAPI
url: openapi/horizonshield-dev-badge-api-openapi.yml
- type: APIReference
url: https://gate.horizonshield.dev/spec
- type: Documentation
url: https://github.com/ogasurfproject-jpg/mcp-conduct#readme
- type: AgentCard
url: https://gate.horizonshield.dev/.well-known/agent-card.json
- type: ChangeLog
url: https://gate.horizonshield.dev/feed.xml
- aid: horizonshield-dev:horizonshield-dev-changes-api
name: HORIZON SHIELD Changes API
description: The Changes API from HORIZON SHIELD — 1 operation(s) for changes.
humanURL: https://github.com/ogasurfproject-jpg/horizon-shield#readme
baseURL: https://mcp.horizonshield.dev
tags:
- Changes
properties:
- type: OpenAPI
url: openapi/horizonshield-dev-changes-api-openapi.yml
- type: APIReference
url: https://gate.horizonshield.dev/spec
- type: Documentation
url: https://github.com/ogasurfproject-jpg/mcp-conduct#readme
- type: AgentCard
url: https://gate.horizonshield.dev/.well-known/agent-card.json
- type: ChangeLog
url: https://gate.horizonshield.dev/feed.xml
- aid: horizonshield-dev:horizonshield-dev-check-api
name: HORIZON SHIELD Check API
description: The Check API from HORIZON SHIELD — 1 operation(s) for check.
humanURL: https://github.com/ogasurfproject-jpg/horizon-shield#readme
baseURL: https://mcp.horizonshield.dev
tags:
- Check
properties:
- type: OpenAPI
url: openapi/horizonshield-dev-check-api-openapi.yml
- type: APIReference
url: https://gate.horizonshield.dev/spec
- type: Documentation
url: https://github.com/ogasurfproject-jpg/mcp-conduct#readme
- type: AgentCard
url: https://gate.horizonshield.dev/.well-known/agent-card.json
- type: ChangeLog
url: https://gate.horizonshield.dev/feed.xml
- aid: horizonshield-dev:horizonshield-dev-e-api
name: HORIZON SHIELD E API
description: The E API from HORIZON SHIELD — 1 operation(s) for e.
humanURL: https://github.com/ogasurfproject-jpg/horizon-shield#readme
baseURL: https://mcp.horizonshield.dev
tags:
- E
properties:
- type: OpenAPI
url: openapi/horizonshield-dev-e-api-openapi.yml
- type: APIReference
url: https://gate.horizonshield.dev/spec
- type: Documentation
url: https://github.com/ogasurfproject-jpg/mcp-conduct#readme
- type: AgentCard
url: https://gate.horizonshield.dev/.well-known/agent-card.json
- type: ChangeLog
url: https://gate.horizonshield.dev/feed.xml
- aid: horizonshield-dev:horizonshield-dev-embed-api
name: HORIZON SHIELD Embed API
description: The Embed API from HORIZON SHIELD — 1 operation(s) for embed.
humanURL: https://github.com/ogasurfproject-jpg/horizon-shield#readme
baseURL: https://mcp.horizonshield.dev
tags:
- Embed
properties:
- type: OpenAPI
url: openapi/horizonshield-dev-embed-api-openapi.yml
- type: APIReference
url: https://gate.horizonshield.dev/spec
- type: Documentation
url: https://github.com/ogasurfproject-jpg/mcp-conduct#readme
- type: AgentCard
url: https://gate.horizonshield.dev/.well-known/agent-card.json
- type: ChangeLog
url: https://gate.horizonshield.dev/feed.xml
- aid: horizonshield-dev:horizonshield-dev-ext-api
name: HORIZON SHIELD Ext API
description: The Ext API from HORIZON SHIELD — 1 operation(s) for ext.
humanURL: https://github.com/ogasurfproject-jpg/horizon-shield#readme
baseURL: https://mcp.horizonshield.dev
tags:
- Ext
properties:
- type: OpenAPI
url: openapi/horizonshield-dev-ext-api-openapi.yml
- type: APIReference
url: https://gate.horizonshield.dev/spec
- type: Documentation
url: https://github.com/ogasurfproject-jpg/mcp-conduct#readme
- type: AgentCard
url: https://gate.horizonshield.dev/.well-known/agent-card.json
- type: ChangeLog
url: https://gate.horizonshield.dev/feed.xml
- aid: horizonshield-dev:horizonshield-dev-feed-xml-api
name: HORIZON SHIELD Feed.xml API
description: The Feed.xml API from HORIZON SHIELD — 1 operation(s) for feed.xml.
humanURL: https://github.com/ogasurfproject-jpg/horizon-shield#readme
baseURL: https://mcp.horizonshield.dev
tags:
- Feed.xml
properties:
- type: OpenAPI
url: openapi/horizonshield-dev-feed-xml-api-openapi.yml
- type: APIReference
url: https://gate.horizonshield.dev/spec
- type: Documentation
url: https://github.com/ogasurfproject-jpg/mcp-conduct#readme
- type: AgentCard
url: https://gate.horizonshield.dev/.well-known/agent-card.json
- type: ChangeLog
url: https://gate.horizonshield.dev/feed.xml
- aid: horizonshield-dev:horizonshield-dev-health-api
name: HORIZON SHIELD Health API
description: The Health API from HORIZON SHIELD — 1 operation(s) for health.
humanURL: https://github.com/ogasurfproject-jpg/horizon-shield#readme
baseURL: https://mcp.horizonshield.dev
tags:
- Health
properties:
- type: OpenAPI
url: openapi/horizonshield-dev-health-api-openapi.yml
- type: APIReference
url: https://gate.horizonshield.dev/spec
- type: Documentation
url: https://github.com/ogasurfproject-jpg/mcp-conduct#readme
- type: AgentCard
url: https://gate.horizonshield.dev/.well-known/agent-card.json
- type: ChangeLog
url: https://gate.horizonshield.dev/feed.xml
- aid: horizonshield-dev:horizonshield-dev-history-api
name: HORIZON SHIELD History API
description: The History API from HORIZON SHIELD — 1 operation(s) for history.
humanURL: https://github.com/ogasurfproject-jpg/horizon-shield#readme
baseURL: https://mcp.horizonshield.dev
tags:
- History
properties:
- type: OpenAPI
url: openapi/horizonshield-dev-history-api-openapi.yml
- type: APIReference
url: https://gate.horizonshield.dev/spec
- type: Documentation
url: https://github.com/ogasurfproject-jpg/mcp-conduct#readme
- type: AgentCard
url: https://gate.horizonshield.dev/.well-known/agent-card.json
- type: ChangeLog
url: https://gate.horizonshield.dev/feed.xml
- aid: horizonshield-dev:horizonshield-dev-mcp-api
name: HORIZON SHIELD MCP API
description: The Mcp API from HORIZON SHIELD — 1 operation(s) for mcp.
humanURL: https://github.com/ogasurfproject-jpg/horizon-shield#readme
baseURL: https://mcp.horizonshield.dev
tags:
- MCP
tags_raw:
- Mcp
properties:
- type: OpenAPI
url: openapi/horizonshield-dev-mcp-api-openapi.yml
- type: APIReference
url: https://gate.horizonshield.dev/spec
- type: Documentation
url: https://github.com/ogasurfproject-jpg/mcp-conduct#readme
- type: AgentCard
url: https://gate.horizonshield.dev/.well-known/agent-card.json
- type: ChangeLog
url: https://gate.horizonshield.dev/feed.xml
- aid: horizonshield-dev:horizonshield-dev-mould-api
name: HORIZON SHIELD Mould API
description: The Mould API from HORIZON SHIELD — 1 operation(s) for mould.
humanURL: https://github.com/ogasurfproject-jpg/horizon-shield#readme
baseURL: https://mcp.horizonshield.dev
tags:
- Mould
properties:
- type: OpenAPI
url: openapi/horizonshield-dev-mould-api-openapi.yml
- type: APIReference
url: https://gate.horizonshield.dev/spec
- type: Documentation
url: https://github.com/ogasurfproject-jpg/mcp-conduct#readme
- type: AgentCard
url: https://gate.horizonshield.dev/.well-known/agent-card.json
- type: ChangeLog
url: https://gate.horizonshield.dev/feed.xml
- aid: horizonshield-dev:horizonshield-dev-nenrin-api
name: HORIZON SHIELD Nenrin API
description: The Nenrin API from HORIZON SHIELD — 1 operation(s) for nenrin.
humanURL: https://github.com/ogasurfproject-jpg/horizon-shield#readme
baseURL: https://mcp.horizonshield.dev
tags:
- Nenrin
properties:
- type: OpenAPI
url: openapi/horizonshield-dev-nenrin-api-openapi.yml
- type: APIReference
url: https://gate.horizonshield.dev/spec
- type: Documentation
url: https://github.com/ogasurfproject-jpg/mcp-conduct#readme
- type: AgentCard
url: https://gate.horizonshield.dev/.well-known/agent-card.json
- type: ChangeLog
url: https://gate.horizonshield.dev/feed.xml
- aid: horizonshield-dev:horizonshield-dev-recompute-api
name: HORIZON SHIELD Recompute API
description: The Recompute API from HORIZON SHIELD — 1 operation(s) for recompute.
humanURL: https://github.com/ogasurfproject-jpg/horizon-shield#readme
baseURL: https://mcp.horizonshield.dev
tags:
- Recompute
properties:
- type: OpenAPI
url: openapi/horizonshield-dev-recompute-api-openapi.yml
- type: APIReference
url: https://gate.horizonshield.dev/spec
- type: Documentation
url: https://github.com/ogasurfproject-jpg/mcp-conduct#readme
- type: AgentCard
url: https://gate.horizonshield.dev/.well-known/agent-card.json
- type: ChangeLog
url: https://gate.horizonshield.dev/feed.xml
- aid: horizonshield-dev:horizonshield-dev-register-api
name: HORIZON SHIELD Register API
description: The Register API from HORIZON SHIELD — 2 operation(s) for register.
humanURL: https://github.com/ogasurfproject-jpg/horizon-shield#readme
baseURL: https://mcp.horizonshield.dev
tags:
- Register
properties:
- type: OpenAPI
url: openapi/horizonshield-dev-register-api-openapi.yml
- type: APIReference
url: https://gate.horizonshield.dev/spec
- type: Documentation
url: https://github.com/ogasurfproject-jpg/mcp-conduct#readme
- type: AgentCard
url: https://gate.horizonshield.dev/.well-known/agent-card.json
- type: ChangeLog
url: https://gate.horizonshield.dev/feed.xml
- aid: horizonshield-dev:horizonshield-dev-self-api
name: HORIZON SHIELD Self API
description: The Self API from HORIZON SHIELD — 1 operation(s) for self.
humanURL: https://github.com/ogasurfproject-jpg/horizon-shield#readme
baseURL: https://mcp.horizonshield.dev
tags:
- Self
properties:
- type: OpenAPI
url: openapi/horizonshield-dev-self-api-openapi.yml
- type: APIReference
url: https://gate.horizonshield.dev/spec
- type: Documentation
url: https://github.com/ogasurfproject-jpg/mcp-conduct#readme
- type: AgentCard
url: https://gate.horizonshield.dev/.well-known/agent-card.json
- type: ChangeLog
url: https://gate.horizonshield.dev/feed.xml
- aid: horizonshield-dev:horizonshield-dev-sitemap-xml-api
name: HORIZON SHIELD Sitemap.xml API
description: The Sitemap.xml API from HORIZON SHIELD — 1 operation(s) for sitemap.xml.
humanURL: https://github.com/ogasurfproject-jpg/horizon-shield#readme
baseURL: https://mcp.horizonshield.dev
tags:
- Sitemap.xml
properties:
- type: OpenAPI
url: openapi/horizonshield-dev-sitemap-xml-api-openapi.yml
- type: APIReference
url: https://gate.horizonshield.dev/spec
- type: Documentation
url: https://github.com/ogasurfproject-jpg/mcp-conduct#readme
- type: AgentCard
url: https://gate.horizonshield.dev/.well-known/agent-card.json
- type: ChangeLog
url: https://gate.horizonshield.dev/feed.xml
- aid: horizonshield-dev:horizonshield-dev-spec-api
name: HORIZON SHIELD Spec API
description: The Spec API from HORIZON SHIELD — 1 operation(s) for spec.
humanURL: https://github.com/ogasurfproject-jpg/horizon-shield#readme
baseURL: https://mcp.horizonshield.dev
tags:
- Spec
properties:
- type: OpenAPI
url: openapi/horizonshield-dev-spec-api-openapi.yml
- type: APIReference
url: https://gate.horizonshield.dev/spec
- type: Documentation
url: https://github.com/ogasurfproject-jpg/mcp-conduct#readme
- type: AgentCard
url: https://gate.horizonshield.dev/.well-known/agent-card.json
- type: ChangeLog
url: https://gate.horizonshield.dev/feed.xml
- aid: horizonshield-dev:horizonshield-dev-sweep-api
name: HORIZON SHIELD Sweep API
description: The Sweep API from HORIZON SHIELD — 1 operation(s) for sweep.
humanURL: https://github.com/ogasurfproject-jpg/horizon-shield#readme
baseURL: https://mcp.horizonshield.dev
tags:
- Sweep
properties:
- type: OpenAPI
url: openapi/horizonshield-dev-sweep-api-openapi.yml
- type: APIReference
url: https://gate.horizonshield.dev/spec
- type: Documentation
url: https://github.com/ogasurfproject-jpg/mcp-conduct#readme
- type: AgentCard
url: https://gate.horizonshield.dev/.well-known/agent-card.json
- type: ChangeLog
url: https://gate.horizonshield.dev/feed.xml
- aid: horizonshield-dev:horizonshield-dev-verified-json-api
name: HORIZON SHIELD Verified.json API
description: The Verified.json API from HORIZON SHIELD — 1 operation(s) for verified.json.
humanURL: https://github.com/ogasurfproject-jpg/horizon-shield#readme
baseURL: https://mcp.horizonshield.dev
tags:
- Verified.json
properties:
- type: OpenAPI
url: openapi/horizonshield-dev-verified-json-api-openapi.yml
- type: APIReference
url: https://gate.horizonshield.dev/spec
- type: Documentation
url: https://github.com/ogasurfproject-jpg/mcp-conduct#readme
- type: AgentCard
url: https://gate.horizonshield.dev/.well-known/agent-card.json
- type: ChangeLog
url: https://gate.horizonshield.dev/feed.xml
- aid: horizonshield-dev:horizonshield-dev-verify-event-api
name: HORIZON SHIELD Verify Event API
description: The Verify Event API from HORIZON SHIELD — 1 operation(s) for verify event.
humanURL: https://github.com/ogasurfproject-jpg/horizon-shield#readme
baseURL: https://mcp.horizonshield.dev
tags:
- Verify Event
properties:
- type: OpenAPI
url: openapi/horizonshield-dev-verify-event-api-openapi.yml
- type: APIReference
url: https://gate.horizonshield.dev/spec
- type: Documentation
url: https://github.com/ogasurfproject-jpg/mcp-conduct#readme
- type: AgentCard
url: https://gate.horizonshield.dev/.well-known/agent-card.json
- type: ChangeLog
url: https://gate.horizonshield.dev/feed.xml
- aid: horizonshield-dev:horizonshield-dev-watchlist-api
name: HORIZON SHIELD Watchlist API
description: The Watchlist API from HORIZON SHIELD — 1 operation(s) for watchlist.
humanURL: https://github.com/ogasurfproject-jpg/horizon-shield#readme
baseURL: https://mcp.horizonshield.dev
tags:
- Watchlist
properties:
- type: OpenAPI
url: openapi/horizonshield-dev-watchlist-api-openapi.yml
- type: APIReference
url: https://gate.horizonshield.dev/spec
- type: Documentation
url: https://github.com/ogasurfproject-jpg/mcp-conduct#readme
- type: AgentCard
url: https://gate.horizonshield.dev/.well-known/agent-card.json
- type: ChangeLog
url: https://gate.horizonshield.dev/feed.xml
- aid: horizonshield-dev:horizonshield-dev-well-known-api
name: HORIZON SHIELD .well Known API
description: The .well Known API from HORIZON SHIELD — 2 operation(s) for .well known.
humanURL: https://github.com/ogasurfproject-jpg/horizon-shield#readme
baseURL: https://mcp.horizonshield.dev
tags:
- .well Known
properties:
- type: OpenAPI
url: openapi/horizonshield-dev-well-known-api-openapi.yml
- type: APIReference
url: https://gate.horizonshield.dev/spec
- type: Documentation
url: https://github.com/ogasurfproject-jpg/mcp-conduct#readme
- type: AgentCard
url: https://gate.horizonshield.dev/.well-known/agent-card.json
- type: ChangeLog
url: https://gate.horizonshield.dev/feed.xml
maintainers:
- FN: Kin Lane
email: kin@apievangelist.com
- FN: APIs.json
email: info@apis.io
common:
- type: Overlay
url: overlays/horizonshield-dev-mcp-conduct-register-overlay.yaml
- type: MCPServer
url: https://gate.horizonshield.dev/mcp
- type: DomainSecurity
url: security/horizonshield-dev-domain-security.yml
- type: AgenticAccess
url: agentic-access/horizonshield-dev-agentic-access.yml
- type: Website
url: https://shield.the-horizons-innovation.com/
- type: Documentation
url: https://github.com/ogasurfproject-jpg/horizon-shield#readme
- type: APIReference
url: https://gate.horizonshield.dev/openapi.json
- type: GettingStarted
url: https://github.com/ogasurfproject-jpg/horizon-shield/blob/main/plugin/README.md
- type: GitHubOrganization
url: https://github.com/ogasurfproject-jpg
- type: Blog
url: https://shield.the-horizons-innovation.com/blog/
- type: Support
url: https://shield.the-horizons-innovation.com/faq/
- type: Leadership
url: https://shield.the-horizons-innovation.com/about-founder.html
- type: Pricing
url: https://shield.the-horizons-innovation.com/yakumo/plans/
- type: TermsOfService
url: https://shield.the-horizons-innovation.com/tos
- type: PrivacyPolicy
url: https://shield.the-horizons-innovation.com/privacy
- type: LLMsTxt
url: llms/horizonshield-dev-llms.txt
- type: LLMsTxt
name: llms.txt (provider-hosted)
url: https://shield.the-horizons-innovation.com/llms.txt
- type: AgentCard
url: a2a/horizonshield-dev-a2a.yml
- type: MCPServer
url: mcp/horizonshield-dev-mcp.yml
- type: ToolCrosswalk
url: mcp/horizonshield-dev-tool-crosswalk.yml
- type: WellKnown
url: well-known/horizonshield-dev-well-known.yml
- type: APICatalog
url: well-known/horizonshield-dev-api-catalog.json
- type: SecurityTxt
url: well-known/horizonshield-dev-security.txt
- type: Security
url: security/horizonshield-dev-vulnerability-disclosure.yml
- type: VulnerabilityDisclosure
url: security/horizonshield-dev-vulnerability-disclosure.yml
- type: Authentication
url: authentication/horizonshield-dev-authentication.yml
- type: Conventions
url: conventions/horizonshield-dev-conventions.yml
- type: ErrorCatalog
url: errors/horizonshield-dev-problem-types.yml
- type: Lifecycle
url: lifecycle/horizonshield-dev-lifecycle.yml
- type: ChangeLog
url: changelog/horizonshield-dev-changelog.yml
- type: Conformance
url: conformance/horizonshield-dev-conformance.yml
- type: Packages
url: packages/horizonshield-dev-packages.yml
- type: SDKs
url: packages/horizonshield-dev-packages.yml
- type: CLI
url: cli/horizonshield-dev-cli.yml
- type: AgentSkill
url: skills/_index.yml
- type: AgentSkill
name: horizon-shield (provider-published SKILL.md)
url: skills/horizonshield-dev-horizon-shield.md
- type: AgentSkill
name: conduct-witness (provider-published SKILL.md)
url: skills/horizonshield-dev-conduct-witness.md
- type: Plans
url: plans/horizonshield-dev-plans-pricing.yml
- type: RateLimits
url: rate-limits/horizonshield-dev-rate-limits.yml
- type: DataModel
url: data-model/horizonshield-dev-data-model.yml
- type: AITransparency
url: https://shield.the-horizons-innovation.com/index_en.html
x-enrichment:
date: '2026-09-19'
status: enriched
artifacts_added: 46
pass: local-v3
x-legal-name: The HORIZ音s株式会社
x-a2a:
verified: true
probed: '2026-09-26'
url: https://mcp.horizonshield.dev/.well-known/agent-card.json
grade: conformant
protocol_version: '1.0'
control: 404
HORIZON SHIELD API — frequently asked questions
Does HORIZON SHIELD have an API?
Yes. APIs.io lists 28 APIs from HORIZON SHIELD, including HORIZON SHIELD KIRA MCP Server, HORIZON SHIELD KIRA A2A Agent and JIDEC Verification Ledger API, and 25 more.
Is there an OpenAPI specification for the HORIZON SHIELD API?
Yes. APIs.io indexes 22 OpenAPI specifications for HORIZON SHIELD, each linked for download from this page.
How do I authenticate with the HORIZON SHIELD API?
HORIZON SHIELD uses bearer-token authentication (0 schemes). The details are profiled on APIs.io as Horizonshield Dev Authentication.
How much does the HORIZON SHIELD API cost?
APIs.io lists 7 pricing plans for HORIZON SHIELD, with each plan's price, limits and inclusions under Pricing Plans on this page.
Does HORIZON SHIELD have an MCP server?
Yes. APIs.io lists 6 MCP servers for HORIZON SHIELD: HORIZON SHIELD operates a FAMILY of remote MCP servers on subdomains of horizonshield.dev (the apex resolves to nothing; see well-known/). The flagship is https://mcp.horizonshield.dev/ — POST-only St
Is the HORIZON SHIELD API ready for AI agents?
HORIZON SHIELD has a Kin Score of 56.1 out of 100 (strong) and an Agent Readiness score of 37.5 (agent-ready), scored by API Evangelist on 2026-10-31.
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