4DBIM

4DBIM is the product brand of Beijing Yunjianxin Technology Co., Ltd. (北京云建信科技有限公司), a Beijing construction-technology company founded in 2015 that commercializes Tsinghua University 4D-BIM and BIM-FM research as a full-lifecycle Building Information Modeling platform for infrastructure. Its 4DBIM Cloud data centre combines a lightweight BIM+GIS graphics engine, multi-source model fusion and IoT ingestion on a microservice architecture, packaged as Power4D (construction management), Wonder4D (operations and maintenance), Skill4D (3D work instructions) and Smart4D (smart precast beam yards), plus a BIM consulting practice. It targets municipal and "national lifeline" infrastructure — metro, bridge, highway, tunnel and utility corridors — and has raised about USD 13.7M through a Series B. The 4DBIM Cloud page markets an "API开放平台" (API open platform), but 4DBIM publishes no developer portal, API reference or machine-readable contract, and www.4dbim.ren is an HTTP-only marketing site.

4DBIM is profiled on the APIs.io network. Tagged areas include Company, Construction, Construction Technology, Building Information Modeling, and BIM.

4DBIM’s developer surface includes support, engineering blog, and 3 more developer resources.

🌐 Visit website 📡 Source on GitHub

5.3/100 minimal ▬ flat Agent 3/100 human only Full breakdown ↓
scored 2026-09-25 · rubric v0.23.0

0 APIs

Company Construction Construction Technology Building Information Modeling BIM Digital Twin Infrastructure Engineering IoT Software-as-a-Service China

Kin Score

Kin Score How this is scored →
scored 2026-09-25 · rubric v0.23.0

Composite quality — 5.3/100 · minimal

Contract Quality 0.0 / 21

Developer Ergonomics 1.0 / 17

Access Clarity 0.0 / 17

Operational Transparency 0.0 / 11

Contract Governance 0.0 / 10

Discoverability 4.7 / 9

Regulatory Posture 0.9 / 15

Agent readiness — 3/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

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/.

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 github.com/api-evangelist/4dbim: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Pricing Plans 1

Published pricing tiers and plan structures.

4Dbim Plans Pricing

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

4Dbim Rate Limits

0 limits

RATE LIMITS

Security Posture 1

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

4Dbim Domain Security

no transport/DNS hardening detected

SECURITY

Resources

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: 4dbim
name: 4DBIM
description: 4DBIM is the product brand of Beijing Yunjianxin Technology Co., Ltd. (北京云建信科技有限公司), a Beijing construction-technology
  company founded in 2015 that commercializes Tsinghua University 4D-BIM and BIM-FM research as a full-lifecycle Building
  Information Modeling platform for infrastructure. Its 4DBIM Cloud data centre combines a lightweight BIM+GIS graphics engine,
  multi-source model fusion and IoT ingestion on a microservice architecture, packaged as Power4D (construction management),
  Wonder4D (operations and maintenance), Skill4D (3D work instructions) and Smart4D (smart precast beam yards), plus a BIM
  consulting practice. It targets municipal and "national lifeline" infrastructure — metro, bridge, highway, tunnel and utility
  corridors — and has raised about USD 13.7M through a Series B. The 4DBIM Cloud page markets an "API开放平台" (API open platform),
  but 4DBIM publishes no developer portal, API reference or machine-readable contract, and www.4dbim.ren is an HTTP-only marketing
  site.
url: https://raw.githubusercontent.com/api-evangelist/4dbim/refs/heads/main/apis.yml
image: http://www.4dbim.ren/images/logo.png
x-type: company
x-source: harvest:secondary-market
x-tier: profiled
x-tier-reason: 'enrichment pass 2026-09-05: full STEP 0b contract discovery run against every known host; no public API surface,
  developer portal or machine-readable contract found'
specificationVersion: '0.20'
created: '2026-09-05'
modified: '2026-09-05'
tags:
- Company
- Construction
- Construction Technology
- Building Information Modeling
- BIM
- Digital Twin
- Infrastructure
- Engineering
- IoT
- Software-as-a-Service
- China
tags_raw:
- Company
- Construction
- Construction Technology
- Building Information Modeling
- BIM
- Digital Twin
- Infrastructure
- Engineering
- Internet of Things
- SaaS
- China
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: http://www.4dbim.ren/zh
- type: Support
  url: http://www.4dbim.ren/zh/about/contact
- type: Blog
  url: http://www.4dbim.ren/zh/news
- type: DomainSecurity
  url: security/4dbim-domain-security.yml
- type: LLMsTxt
  url: llms/4dbim-llms.txt
x-enrichment:
  date: '2026-09-05'
  status: minimal
  artifacts_added: 5
  pass: local-v3
x-coverage:
  state: gated
  reason: sales-gate
  detail: The 4DBIM Cloud product page markets an "API开放平台" (API open platform) as a platform capability but links to no reference
    and no specification, and the site has no /docs, /developers, /pricing, login or sign-up path at all — the only route
    offered anywhere on www.4dbim.ren is the business-cooperation address market@4dbim.ren on the contact page.
  evidence:
  - url: http://www.4dbim.ren/zh/products/cloud
    status: 200
  - url: http://www.4dbim.ren/zh/about/contact
    status: 200
  - url: http://www.4dbim.ren/openapi.json
    status: 404
  - url: http://www.4dbim.ren/swagger.json
    status: 404
  - url: http://www.4dbim.ren/api-docs
    status: 404
  - url: http://www.4dbim.ren/.well-known/api-catalog
    status: 404
  - url: http://www.4dbim.ren/.well-known/agent-card.json
    status: 404
  - url: http://www.4dbim.ren/llms.txt
    status: 404
  - url: http://www.4dbim.cn/.well-known/api-catalog
    status: 403
  checked: '2026-09-05'

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