Limbo Labs (limbolabs.com) website screenshot

Limbo Labs (limbolabs.com)

Limbo Labs was, in its own words, "a small technical team in san francisco" whose products were to "begin launching in july 2010". The company surfaced in the 500 Global portfolio listing and was added to the API Evangelist network as a lead. Enrichment found no company to enrich: limbolabs.com carried a single-page placeholder from 2010 through roughly 2015 and never grew past it — an Internet Archive enumeration of the domain returns only eleven distinct captured URLs, all of them the one landing page plus its stylesheets, jQuery and four images. No product, developer portal, API reference, OpenAPI or Swagger document, SDK or machine-readable specification was ever published or archived. By 2018 the domain served a JavaScript-wall parking page, and it now redirects to an Afternic "for sale" lander, so the brand is retired. The website URL carried on the inbound 500 Global portfolio record, readyforzero.com, is a mis-joined row: it belongs to ReadyForZero, a separate 500 Global personal-finance company, and it no longer resolves. This profile is retained as a historical, defunct-provider record with no active API surface.

Limbo Labs (limbolabs.com) is profiled on the APIs.io network. Tagged areas include Company, Defunct, Startup, San Francisco, and Venture Backed.

🌐 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
CompanyDefunctStartupSan FranciscoVenture BackedSoftware

Kin Score

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/limbo-labs: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

Security Posture 1

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

Limbo Labs Domain Security

TLSv1.3

SECURITY

Resources

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

Lifecycle
Lifecycle

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Company 1

The organization behind the API

Website
Website

Source (apis.yml)

apis.yml Raw ↑ 
aid: limbo-labs
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/limbo-labs.png
name: Limbo Labs (limbolabs.com)
description: 'Limbo Labs was, in its own words, "a small technical team in san francisco" whose products were to "begin launching
  in july 2010". The company surfaced in the 500 Global portfolio listing and was added to the API Evangelist network as a
  lead. Enrichment found no company to enrich: limbolabs.com carried a single-page placeholder from 2010 through roughly 2015
  and never grew past it — an Internet Archive enumeration of the domain returns only eleven distinct captured URLs, all of
  them the one landing page plus its stylesheets, jQuery and four images. No product, developer portal, API reference, OpenAPI
  or Swagger document, SDK or machine-readable specification was ever published or archived. By 2018 the domain served a JavaScript-wall
  parking page, and it now redirects to an Afternic "for sale" lander, so the brand is retired. The website URL carried on
  the inbound 500 Global portfolio record, readyforzero.com, is a mis-joined row: it belongs to ReadyForZero, a separate 500
  Global personal-finance company, and it no longer resolves. This profile is retained as a historical, defunct-provider record
  with no active API surface.'
url: https://raw.githubusercontent.com/api-evangelist/limbo-labs/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- 500-global
x-tier: historical
x-tier-reason: defunct-no-api-surface
x-status: defunct
x-status-note: limbolabs.com redirects to an Afternic domain-sale lander; no successor company or acquirer was identified.
x-headquarters: San Francisco, California, United States
x-api-surface: none
x-enrichment-note: Inbound portfolio record listed https://readyforzero.com as the website; that domain is NXDOMAIN and belongs
  to a different 500 Global company (ReadyForZero). Corrected to the company's own historical domain, limbolabs.com.
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-19'
tags:
- Company
- Defunct
- Startup
- San Francisco
- Venture Backed
- Software
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://limbolabs.com
- type: Lifecycle
  url: lifecycle/limbo-labs-lifecycle.yml
- type: DomainSecurity
  url: security/limbo-labs-domain-security.yml
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence