Oneforty

Oneforty was a Twitter application marketplace and app store founded by Laura Fitton in 2009, letting users discover, review, and purchase third-party apps and services built on the Twitter API. It raised roughly $1.9M (Flybridge Capital, Javelin Venture Partners, and angels including Dave McClure) and grew to thousands of listed apps before being acquired by HubSpot in 2011. The company is defunct — the oneforty.com domain now 301-redirects to hubspot.com and exposes no developer surface, API, documentation, or SDKs. Retained in the network as a historical portfolio-lead record only.

Oneforty is profiled on the APIs.io network. Tagged areas include Company, Twitter, App Marketplace, Social Media, and Developer Ecosystem.

🌐 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

CompanyTwitterApp MarketplaceSocial MediaDeveloper EcosystemAcquiredDefunct

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

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Resources

Company 1

The organization behind the API

Website

Website

Source (apis.yml)

aid: oneforty
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/oneforty.png
name: Oneforty
description: Oneforty was a Twitter application marketplace and app store founded by Laura Fitton in 2009, letting users discover,
  review, and purchase third-party apps and services built on the Twitter API. It raised roughly $1.9M (Flybridge Capital,
  Javelin Venture Partners, and angels including Dave McClure) and grew to thousands of listed apps before being acquired
  by HubSpot in 2011. The company is defunct — the oneforty.com domain now 301-redirects to hubspot.com and exposes no developer
  surface, API, documentation, or SDKs. Retained in the network as a historical portfolio-lead record only.
url: https://raw.githubusercontent.com/api-evangelist/oneforty/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- 500-global
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-20'
tags:
- Company
- Twitter
- App Marketplace
- Social Media
- Developer Ecosystem
- Acquired
- Defunct
x-status: defunct
x-acquired-by: hubspot
x-acquired-year: 2011
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://oneforty.com
x-enrichment:
  date: '2026-07-20'
  status: nochange
  artifacts_added: 0
  pass: local-v1
  note: Defunct company (Twitter app marketplace, acquired by HubSpot 2011); oneforty.com 301-redirects to hubspot.com; no
    API surface, docs, packages, well-known, or llms.txt.