Binary Thumbs

Binary Thumbs (operating name "Binary Thumb", Y Combinator Summer 2012) was a San Francisco startup founded in 2012 by Josh Leong, Michael Lin, and Matt Monson to reinvent the spreadsheet for touch devices. Its single product, Grid, was a collaborative grid-based spreadsheet and organizational app for iPad and iPhone that let people keep notes, pictures, people, and places in a freeform grid rather than rigid rows and columns. The company raised roughly $2.15M across a 2012 YC round and a 2013 seed, with participation from angel and institutional investors, and appears on the Andreessen Horowitz public investment list. Y Combinator now lists the company as inactive; Josh Leong led it as CEO from 2012 to 2016. Binary Thumb never shipped a public API, developer portal, or documentation surface -- it was a consumer iOS product company. Its lasting public technical footprint is the BinaryThumb GitHub organization and a handful of open-source React and JavaScript utility libraries published to npm.

Binary Thumbs is profiled on the APIs.io network. Tagged areas include Company, Inactive, Y Combinator, Productivity, and Spreadsheets.

📡 Profile data on GitHub

0.0/100 minimal ▬ flat Agent 0/100 human only Heartbeat 0/100 dormant library Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

0 APIs

Company Inactive Y Combinator Productivity Spreadsheets Mobile iOS Consumer Software Open Source Defunct

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 0.0/100 · minimal

Contract Quality 0.0 / 21

Developer Ergonomics 0.0 / 17

Access Clarity 0.0 / 17

Operational Transparency 0.0 / 11

Contract Governance 0.0 / 10

Discoverability 0.0 / 9

Regulatory Posture 0.0 / 15

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

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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Agent readiness — checks not met, largest first (exact, from this profile):

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document
MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey)
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes

13 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 0.0 — up to +25.0 composite points
Developer Ergonomics scores 0.0 — up to +20.0 composite points
Access Clarity scores 0.0 — up to +20.0 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from the provider profile at artifacts.apis.io/binary-thumbs/apis.yml: open an issue on github.com/api-evangelist/binary-thumbs to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Apple Accessory & Device Ecosystem (MFi, Matter, Apple partners)	undeclared	-	-	-
Mobile SDK Publishers (Play SDK Index, CocoaPods, ADA certification)	undeclared	-	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

Resources

Build 2

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Packages

Packages

Source (apis.yml)

aid: binary-thumbs
name: Binary Thumbs
description: Binary Thumbs (operating name "Binary Thumb", Y Combinator Summer 2012) was a San Francisco startup founded in
  2012 by Josh Leong, Michael Lin, and Matt Monson to reinvent the spreadsheet for touch devices. Its single product, Grid,
  was a collaborative grid-based spreadsheet and organizational app for iPad and iPhone that let people keep notes, pictures,
  people, and places in a freeform grid rather than rigid rows and columns. The company raised roughly $2.15M across a 2012
  YC round and a 2013 seed, with participation from angel and institutional investors, and appears on the Andreessen Horowitz
  public investment list. Y Combinator now lists the company as inactive; Josh Leong led it as CEO from 2012 to 2016. Binary
  Thumb never shipped a public API, developer portal, or documentation surface -- it was a consumer iOS product company. Its
  lasting public technical footprint is the BinaryThumb GitHub organization and a handful of open-source React and JavaScript
  utility libraries published to npm.
url: https://raw.githubusercontent.com/api-evangelist/binary-thumbs/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- a16z
x-tier: stub
x-tier-reason: portfolio-lead
x-status: defunct
x-status-source: https://www.ycombinator.com/companies/binary-thumb
x-status-note: 'Y Combinator lists the company (batch S12, product "Grid") as Inactive. The Grid iOS App Store listing returns
  404 and the historical binarythumb.com domain now serves unrelated affiliate/gambling SEO content, so it is NOT wired as
  a Website or DeveloperPortal property. No API surface exists: no OpenAPI, docs, auth, sandbox, changelog, status page, or
  event surface were found, so no artifact pointers are emitted for those types.'
x-founded: '2012'
x-founders:
- Josh Leong
- Michael Lin
- Matt Monson
x-location: San Francisco, CA, United States
x-yc-batch: S12
deliveryModel:
  model: library
  open_source: false
  commercial: false
  callable_host: false
  label: Library · distributed through package registries, no callable service
  confidence: low
  source:
  - none
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-11-06'
  method: derived
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-20'
image: https://github.com/BinaryThumb.png
tags:
- Company
- Inactive
- Y Combinator
- Productivity
- Spreadsheets
- Mobile
- iOS
- Consumer Software
- Open Source
- Defunct
tags_raw:
- Company
- Inactive
- Y Combinator
- Productivity
- Spreadsheets
- Mobile
- iOS
- Consumer Software
- Open Source
- Open-Source
- Defunct
apis: []
common:
- type: GitHubOrganization
  name: Binary Thumb on GitHub
  url: https://github.com/BinaryThumb
- type: Packages
  name: Binary Thumb open-source npm packages
  url: packages/binary-thumbs-packages.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-20'
  status: minimal
  artifacts_added: 1
  pass: local-v1

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