Den

Den (den.archi) is a Korean AEC (architecture, engineering and construction) knowledge-curation system delivered as a remote MCP server. It gives AI agents normative and practical AEC knowledge with citations: Korean national construction standards (KDS and KCS), KS standards, building-related laws and their annexed tables, plus structural, construction, MEP, materials and planning know-how. Each clause and number carries its source and applicability conditions, facts are separated from interpretations, and content Den does not hold is explicitly marked as not held. Its tools cover standard/clause lookup, term definitions, causal explanations, construction sequences, method comparisons, site conditions, floor-plan code review and concept linking. It connects to Claude and ChatGPT as a custom connector and is offered as a free beta by application (support@den.archi).

Den is listed with 1 API on the APIs.io network. Tagged areas include Company, Architecture, Construction, AEC, and Building Codes.

Den’s developer surface includes authentication, getting-started guide, signup flow, and 16 more developer resources.

28.8/100 thin Agent 25/100 agent aware Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →
AccessFreeSelf serve⚡ Free to try
1 API 1 MCP Servers
CompanyArchitectureConstructionAECBuilding CodesStandardsKnowledge BaseMCPAI AgentsSouth Korea

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0
Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) 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. Kin Score badge preview for Den It updates itself when the score changes. Paste this where you link to your API docs:
<a href="https://apis.io/providers/den-archi/"><img src="https://apis.io/badge/den-archi/card.svg" alt="Den 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):
  • Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document
  • Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
  • 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)
  • Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
  • A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
  • Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
7 more unmet checks in the Agent Readiness table above.
Kin Score — facets with the most composite points still available (weight × headroom):
Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from the provider profile at artifacts.apis.io/den-archi/apis.yml: open an issue on github.com/api-evangelist/den-archi to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Standards implemented 3

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.

measured — observed by APIs.io (documented)
measured — observed by APIs.io (verified)
measured — observed by APIs.io (published)

APIs 1

Individual APIs this provider publishes, each with its own machine-readable definition.

Den MCP Server

Remote MCP server (Streamable HTTP, OAuth) that gives AI agents cited Korean AEC knowledge -- KDS/KCS construction standards, KS standards, building laws and annexed tables, and...

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

Den MCP Server

Remote MCP server at mcp.den.archi over streamable HTTP requiring OAuth; 13 tools listed.

MCP SERVER

Den API pricing

Prices published by Den.

PlanPrice
Free beta 무료 베타

Plan details, limits and sources →

Pricing Plans 1

Published pricing tiers and plan structures.

Rate Limits 1

Documented rate limits and quota policies.

Den Archi Rate Limits

0 limits

RATE LIMITS

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Den Archi Authentication

3 schemes

SECURITY

Den Archi Domain Security

TLSv1.3 · DMARC

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Den Archi Scopes

1 scope

1 scopes

SCOPES

Resources

Get Started 2

Portal, sign-up, and the first successful call

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

Design & Contract 3

Pagination, idempotency, versioning, errors, and events

Build 3

SDKs, sample code, and the tooling you integrate with

Access & Security 3

Authentication, authorization, and security posture

Commercial 3

Pricing, plans, and the legal terms of use

Company 1

The organization behind the API

Other 2

Properties that don't map to a standard resource type

Source (apis.yml)

apis.yml Raw ↑
aid: den-archi
name: Den
description: 'Den (den.archi) is a Korean AEC (architecture, engineering and construction) knowledge-curation system delivered
  as a remote MCP server. It gives AI agents normative and practical AEC knowledge with citations: Korean national construction
  standards (KDS and KCS), KS standards, building-related laws and their annexed tables, plus structural, construction, MEP,
  materials and planning know-how. Each clause and number carries its source and applicability conditions, facts are separated
  from interpretations, and content Den does not hold is explicitly marked as not held. Its tools cover standard/clause lookup,
  term definitions, causal explanations, construction sequences, method comparisons, site conditions, floor-plan code review
  and concept linking. It connects to Claude and ChatGPT as a custom connector and is offered as a free beta by application
  (support@den.archi).'
url: https://artifacts.apis.io/den-archi/apis.yml
accessModel:
  pricing: free
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Free · Self-serve signup
  confidence: high
  probe_state: covered
  source:
  - plans
  - authentication
  - scopes
  - security
  generated: '2026-11-06'
  method: derived
image: https://den.archi/assets/logo/og.png
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-05 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-11-05'
modified: '2026-11-05'
tags:
- Company
- Architecture
- Construction
- AEC
- Building Codes
- Standards
- Knowledge Base
- MCP
- AI Agents
- South Korea
tags_raw:
- Company
- Architecture
- Construction
- AEC
- Building Codes
- Standards
- Knowledge Base
- MCP
- AI Agents
- Korea
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Plans
  url: plans/den-archi-plans-pricing.yml
- type: Conventions
  url: conventions/den-archi-conventions.yml
- type: Authentication
  url: authentication/den-archi-authentication.yml
- type: OAuthScopes
  url: scopes/den-archi-scopes.yml
- type: Lifecycle
  url: lifecycle/den-archi-lifecycle.yml
- type: Conformance
  url: conformance/den-archi-conformance.yml
- type: MCPServer
  url: mcp/den-archi-mcp.yml
- type: WellKnown
  url: well-known/den-archi-well-known.yml
- type: Hosts
  url: hosts/den-archi-hosts.yml
- type: IntegrationEdges
  url: integrations/den-archi-integration-edges.yml
- type: Vendors
  url: vendors/den-archi-vendors.yml
- type: SDKs
  url: packages/den-archi-packages.yml
- type: Packages
  url: packages/den-archi-packages.yml
- type: DomainSecurity
  url: security/den-archi-domain-security.yml
- type: Website
  url: https://den.archi/
- type: GettingStarted
  url: https://den.archi/beta.html
- type: SignUp
  url: https://mcp.den.archi/signup?via=landing
- type: TermsOfService
  url: https://den.archi/terms.html
- type: PrivacyPolicy
  url: https://den.archi/privacy.html
apis:
- aid: den-archi:den-mcp-server
  name: Den MCP Server
  description: Remote MCP server (Streamable HTTP, OAuth) that gives AI agents cited Korean AEC knowledge -- KDS/KCS construction
    standards, KS standards, building laws and annexed tables, and structural, construction, MEP, materials and planning know-how.
    The den.archi homepage instructs users to register https://mcp.den.archi/mcp as a custom connector and authenticate with
    OAuth. No OpenAPI, AsyncAPI, GraphQL, gRPC or WSDL contract is published; the MCP tools/list is the machine-readable surface.
  humanURL: https://den.archi/
  baseURL: https://mcp.den.archi/mcp
  tags:
  - MCP
  - AEC
  - Building Codes
  properties:
  - type: GettingStarted
    url: https://den.archi/beta.html
  - type: SignUp
    url: https://mcp.den.archi/signup?via=landing
x-coverage:
  state: covered
  reason: identity-verified
  detail: 'Identity from the company''s own site: title "Den | AEC 전문 지식 큐레이팅 시스템", og:site_name "Den", footer "© 2026 Den";
    no legal entity is published (terms are a v0 beta draft). Free beta, no pricing page; support is by email only (support@den.archi).'
  evidence:
  - url: https://den.archi/
    status: 200
  - url: https://den.archi/beta.html
    status: 200
  - url: https://mcp.den.archi/signup?via=landing
    status: 200
  - url: https://den.archi/terms.html
    status: 200
  - url: https://den.archi/privacy.html
    status: 200
  - url: https://den.archi/assets/logo/og.png
    status: 200
  - url: https://mcp.den.archi/
    status: 200
x-enrichment:
  date: '2026-11-05'
  status: enriched
  artifacts_added: 19
  pass: modular-v1
  engine: identity=anthropic,contract=anthropic,surfaces=anthropic,docs=anthropic,regulatory=anthropic

Den API — frequently asked questions

Does Den have an API?

Yes. APIs.io lists 1 API from Den, including Den MCP Server.

How do I authenticate with the Den API?

Den documents its authentication (3 schemes). The details are profiled on APIs.io as Den Archi Authentication.

How much does the Den API cost?

Den publishes its prices; its Free beta plan is 무료 베타 as of 2026-11-05. APIs.io lists 1 pricing plan for Den, with each plan's price, limits and inclusions under Pricing on this page.

Does Den have an MCP server?

Yes. APIs.io lists 1 MCP server for Den: Remote MCP server at mcp.den.archi over streamable HTTP requiring OAuth; 13 tools listed.

Is the Den API ready for AI agents?

Den has a Kin Score of 28.8 out of 100 (thin) and an Agent Readiness score of 24.7 (agent-aware), scored by API Evangelist on 2026-11-06.

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for providers

9 MCP tools reach this
  • find_providersBrowse and filter every provider in the catalog.
  • get_provider_artifactsEvery artifact this provider publishes, grouped by type.
  • get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
  • get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
  • get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
  • get_provider_ratingPRO — composite, band, trend and facet scores.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This provider
curl "https://apis.io/api/v1/providers/den-archi"
All providers
curl "https://apis.io/api/v1/providers?limit=25"
Every operation they expose
curl "https://apis.io/api/v1/providers/den-archi/operations?limit=25"
How their score was established
curl "https://apis.io/api/v1/providers/den-archi/evidence"

Calls without X-API-Key need no key. Calls with it need a paid plan — get a key.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

A second provider on the same verified email joins the account you already have.