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

5.0/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-08-21 · rubric v0.12.0

0 APIs

Company Commercial Real Estate Real-Estate PropTech Marketplace Search Office Space Y Combinator Acquired

Kin Score

Kin Score How this is scored →
scored 2026-08-21 · rubric v0.12.0

Composite quality — 5.0/100 · minimal

Contract Quality 0.0 / 25

Developer Ergonomics 0.0 / 20

Access Clarity 0.0 / 20

Operational Transparency 0.0 / 13

Contract Governance 0.0 / 12

Discoverability 5.0 / 10

Agent readiness — 0/100 · 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 0 / 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

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: '0.23'
created: '2026-07-17'
modified: '2026-07-17'
tags:
- Company
- Commercial Real Estate
- Real-Estate
- PropTech
- Marketplace
- Search
- Office Space
- Y Combinator
- Acquired
tags_raw:
- 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

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/42floors"

All providers

curl "https://apis.io/api/v1/providers?limit=25"

Every operation they expose

curl "https://apis.io/api/v1/providers/42floors/operations?limit=25"

How their score was established

curl "https://apis.io/api/v1/providers/42floors/evidence"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no email required.

GitHub Google LinkedIn

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