42Floors

42Floors was a commercial real estate (CRE) search engine that made it easy to search for office space, coworking, and commercial listings across major U.S. markets. Founded in 2011 and part of Y Combinator's Winter 2012 batch, it was backed by Andreessen Horowitz (a16z) and other investors and grew a nationwide catalog of hundreds of thousands of listings. The company was acquired by flexible-office provider Knotel in July 2018, and later by real estate software company Yardi in 2021, which folded the 42Floors listing service into its CommercialEdge network of marketplaces (CommercialCafe, CommercialSearch, Point2, PropertyShark). 42Floors no longer operates as an independent brand: its 42floors.com domain now redirects to commercialcafe.com, and it exposes no public developer program, API, or documentation. This profile is retained in the API Evangelist network as an a16z portfolio-company lead with no active API surface to enrich.

42Floors is profiled on the APIs.io network. Tagged areas include Company, Commercial Real Estate, Real Estate, PropTech, and Marketplace.

🌐 Visit website 📡 Source on GitHub

6.8/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5

0 APIs

CompanyCommercial Real EstateReal EstatePropTechMarketplaceSearchOffice SpaceY CombinatorAcquired

Kin Score

Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5

Composite quality — 6.8/100 · minimal

Contract Quality 0.0 / 25

Developer Ergonomics 0.0 / 20

Commercial Clarity 0.0 / 20

Operational Transparency 0.0 / 13

Governance 0.0 / 12

Discoverability 6.8 / 10

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 15

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 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/42floors: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

Source (apis.yml)

aid: 42floors
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/42floors.png
name: 42Floors
description: '42Floors was a commercial real estate (CRE) search engine that made it easy to search for office space, coworking,
  and commercial listings across major U.S. markets. Founded in 2011 and part of Y Combinator''s Winter 2012 batch, it was
  backed by Andreessen Horowitz (a16z) and other investors and grew a nationwide catalog of hundreds of thousands of listings.
  The company was acquired by flexible-office provider Knotel in July 2018, and later by real estate software company Yardi
  in 2021, which folded the 42Floors listing service into its CommercialEdge network of marketplaces (CommercialCafe, CommercialSearch,
  Point2, PropertyShark). 42Floors no longer operates as an independent brand: its 42floors.com domain now redirects to commercialcafe.com,
  and it exposes no public developer program, API, or documentation. This profile is retained in the API Evangelist network
  as an a16z portfolio-company lead with no active API surface to enrich.'
url: https://raw.githubusercontent.com/api-evangelist/42floors/refs/heads/main/apis.yml
x-type: company
x-source: a16z-portfolio
x-tier: stub
x-tier-reason: portfolio-lead
x-status: acquired
x-status-detail: Acquired by Knotel (2018), then Yardi (2021); folded into CommercialEdge / CommercialCafe. 42floors.com 301-redirects
  to commercialcafe.com. No public API or developer surface.
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-17'
tags:
- Company
- Commercial Real Estate
- Real Estate
- PropTech
- Marketplace
- Search
- Office Space
- Y Combinator
- Acquired
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence