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'