Ninety.io

Ninety.io (Ninety) is a software platform for implementing the Entrepreneurial Operating System (EOS). It gives founders and leadership teams purpose-built tools for the Accountability Chart, the Vision/Traction Organizer (V/TO), quarterly Rocks, the weekly Scorecard, To-Dos, the Issues List, and EOS meeting rhythms such as the Level 10 meeting. Ninety exposes a REST Public API (v1) at api.public.ninety.io authenticated with per-user Personal Access Tokens, giving programmatic create/read/update/delete access to To-Dos, Issues, Rocks, Milestones, Scorecard measurables (KPIs, scores, notes), Teams, and Users.

Ninety.io publishes 7 APIs on the APIs.io network, including Issues API, Milestones API, Rocks API, and 4 more. Tagged areas include Company, EOS, Entrepreneurial Operating System, Business Management, and Meetings.

Ninety.io’s developer surface includes documentation, API reference, getting-started guide, support, engineering blog, pricing, signup flow, and 24 more developer resources.

🌐 Visit website 📡 Source on GitHub

47.0/100 developing ▬ flat Agent 24/100 agent aware saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

1 APIs

Company EOSEntrepreneurial Operating SystemBusiness Management Meetings Productivity Scorecard Team Management Goal Tracking

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 47.0/100 · developing

Contract Quality 11.1 / 23

Developer Ergonomics 8.9 / 18

Access Clarity 8.3 / 18

Operational Transparency 4.3 / 12

Contract Governance 0.5 / 11

Discoverability 6.8 / 9

Create-or-Update Ergonomics 3.3 / 10

Agent readiness — 24/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 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

Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

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 github.com/api-evangelist/ninetyio: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 7

Individual APIs this provider publishes, each with its own machine-readable definition.

Ninety.io Issues API

The Issues API from Ninety.io — 3 operation(s) for issues.

Ninety.io Milestones API

The Milestones API from Ninety.io — 2 operation(s) for milestones.

Ninety.io Rocks API

The Rocks API from Ninety.io — 3 operation(s) for rocks.

Ninety.io Scorecard API

The Scorecard API from Ninety.io — 5 operation(s) for scorecard.

Ninety.io Teams API

The Teams API from Ninety.io — 1 operation(s) for teams.

Ninety.io To-Dos API

The To-Dos API from Ninety.io — 3 operation(s) for to-dos.

Ninety.io Users API

The Users API from Ninety.io — 1 operation(s) for users.

Scroll for all 7

Open Collections 8

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

Ninety Public Issues API

OPEN COLLECTION

Ninety Public Issues Milestones API

OPEN COLLECTION

Ninety Public Issues Rocks API

OPEN COLLECTION

Ninety Public Issues Scorecard API

OPEN COLLECTION

Ninety Public Issues Teams API

OPEN COLLECTION

Ninety Public Issues To-Dos API

OPEN COLLECTION

Ninety Public Issues Users API

OPEN COLLECTION

Scroll for all 8

Arazzo Workflows 2

Multi-step API workflows described with the Arazzo specification.

Create a Ninety Rock with Milestones

Resolve a team, create a quarterly Rock, and attach a Milestone to it.

ARAZZO

Log and Solve a Ninety Issue

Resolve a team, create an Issue on its list, then mark it solved.

ARAZZO

Security Posture 3

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

Ninetyio Authentication

http · 1 scheme

SECURITY

Ninetyio Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Ninetyio Trust Center

trust center published

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Ninetyio Agentic Access

25 operations · 19 acting · 19 human-in-the-loop

25 operations · 19 acting

AGENTIC

Resources

Get Started 3

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

SignUp

SignUp

Login

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

X-MCPServerCandidate

LLMsTxt

AgentSkill

AgenticAccess

Design & Contract 7

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

Lifecycle

Conformance

DataModel

Arazzo

Arazzo

Scroll for all 7

Access & Security 3

Authentication, authorization, and security posture

TrustCenter

TrustCenter

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 6

Status, limits, changes, and where to get help

Support

HelpCenter

Community

Roadmap

StatusPage

ChangeLog

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 1

Properties that don't map to a standard resource type

Overlay

Overlay

Source (apis.yml)

aid: ninetyio
name: Ninety.io
description: Ninety.io (Ninety) is a software platform for implementing the Entrepreneurial Operating System (EOS). It gives
  founders and leadership teams purpose-built tools for the Accountability Chart, the Vision/Traction Organizer (V/TO), quarterly
  Rocks, the weekly Scorecard, To-Dos, the Issues List, and EOS meeting rhythms such as the Level 10 meeting. Ninety exposes
  a REST Public API (v1) at api.public.ninety.io authenticated with per-user Personal Access Tokens, giving programmatic create/read/update/delete
  access to To-Dos, Issues, Rocks, Milestones, Scorecard measurables (KPIs, scores, notes), Teams, and Users.
url: https://raw.githubusercontent.com/api-evangelist/ninetyio/refs/heads/main/apis.yml
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  generated: '2026-09-03'
  method: derived
image: https://www.ninety.io/hubfs/LI_Thumb_Home.jpg
x-type: company
x-source: vc-portfolio
x-backed-by:
- insight-partners
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-20'
tags:
- Company
- EOS
- Entrepreneurial Operating System
- Business Management
- Meetings
- Productivity
- Scorecard
- Team Management
- Goal Tracking
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
apis:
- aid: ninetyio:ninetyio-issues-api
  name: Ninety.io Issues API
  description: The Issues API from Ninety.io — 3 operation(s) for issues.
  humanURL: https://help.ninety.io/en/articles/15505694-api-reference-and-access
  baseURL: https://api.public.ninety.io/v1
  tags:
  - Issues
  properties:
  - type: OpenAPI
    url: openapi/ninetyio-issues-api-openapi.yml
  - type: APIReference
    url: https://api.public.ninety.io/v1/swagger/index.html
  - type: Documentation
    url: https://help.ninety.io/en/articles/15505694-api-reference-and-access
- aid: ninetyio:ninetyio-milestones-api
  name: Ninety.io Milestones API
  description: The Milestones API from Ninety.io — 2 operation(s) for milestones.
  humanURL: https://help.ninety.io/en/articles/15505694-api-reference-and-access
  baseURL: https://api.public.ninety.io/v1
  tags:
  - Milestones
  properties:
  - type: OpenAPI
    url: openapi/ninetyio-milestones-api-openapi.yml
  - type: APIReference
    url: https://api.public.ninety.io/v1/swagger/index.html
  - type: Documentation
    url: https://help.ninety.io/en/articles/15505694-api-reference-and-access
- aid: ninetyio:ninetyio-rocks-api
  name: Ninety.io Rocks API
  description: The Rocks API from Ninety.io — 3 operation(s) for rocks.
  humanURL: https://help.ninety.io/en/articles/15505694-api-reference-and-access
  baseURL: https://api.public.ninety.io/v1
  tags:
  - Rocks
  properties:
  - type: OpenAPI
    url: openapi/ninetyio-rocks-api-openapi.yml
  - type: APIReference
    url: https://api.public.ninety.io/v1/swagger/index.html
  - type: Documentation
    url: https://help.ninety.io/en/articles/15505694-api-reference-and-access
- aid: ninetyio:ninetyio-scorecard-api
  name: Ninety.io Scorecard API
  description: The Scorecard API from Ninety.io — 5 operation(s) for scorecard.
  humanURL: https://help.ninety.io/en/articles/15505694-api-reference-and-access
  baseURL: https://api.public.ninety.io/v1
  tags:
  - Scorecard
  properties:
  - type: OpenAPI
    url: openapi/ninetyio-scorecard-api-openapi.yml
  - type: APIReference
    url: https://api.public.ninety.io/v1/swagger/index.html
  - type: Documentation
    url: https://help.ninety.io/en/articles/15505694-api-reference-and-access
- aid: ninetyio:ninetyio-teams-api
  name: Ninety.io Teams API
  description: The Teams API from Ninety.io — 1 operation(s) for teams.
  humanURL: https://help.ninety.io/en/articles/15505694-api-reference-and-access
  baseURL: https://api.public.ninety.io/v1
  tags:
  - Team
  tags_raw:
  - Teams
  properties:
  - type: OpenAPI
    url: openapi/ninetyio-teams-api-openapi.yml
  - type: APIReference
    url: https://api.public.ninety.io/v1/swagger/index.html
  - type: Documentation
    url: https://help.ninety.io/en/articles/15505694-api-reference-and-access
- aid: ninetyio:ninetyio-to-dos-api
  name: Ninety.io To-Dos API
  description: The To-Dos API from Ninety.io — 3 operation(s) for to-dos.
  humanURL: https://help.ninety.io/en/articles/15505694-api-reference-and-access
  baseURL: https://api.public.ninety.io/v1
  tags:
  - To-Dos
  properties:
  - type: OpenAPI
    url: openapi/ninetyio-to-dos-api-openapi.yml
  - type: APIReference
    url: https://api.public.ninety.io/v1/swagger/index.html
  - type: Documentation
    url: https://help.ninety.io/en/articles/15505694-api-reference-and-access
- aid: ninetyio:ninetyio-users-api
  name: Ninety.io Users API
  description: The Users API from Ninety.io — 1 operation(s) for users.
  humanURL: https://help.ninety.io/en/articles/15505694-api-reference-and-access
  baseURL: https://api.public.ninety.io/v1
  tags:
  - User
  tags_raw:
  - Users
  properties:
  - type: OpenAPI
    url: openapi/ninetyio-users-api-openapi.yml
  - type: APIReference
    url: https://api.public.ninety.io/v1/swagger/index.html
  - type: Documentation
    url: https://help.ninety.io/en/articles/15505694-api-reference-and-access
common:
- type: Website
  url: https://www.ninety.io/
- type: Documentation
  url: https://help.ninety.io/en/articles/15505694-api-reference-and-access
- type: APIReference
  url: https://api.public.ninety.io/v1/swagger/index.html
- type: GettingStarted
  url: https://help.ninety.io/en/articles/15505694-api-reference-and-access
- type: Support
  url: https://help.ninety.io/
- type: HelpCenter
  url: https://help.ninety.io/
- type: Community
  url: https://community.ninety.io/
- type: Blog
  url: https://www.ninety.io/updates
- type: Roadmap
  url: https://www.ninety.io/product-updates
- type: Pricing
  url: https://www.ninety.io/pricing
- type: SignUp
  url: https://app.ninety.io/signup
- type: Login
  url: https://app.ninety.io/login
- type: TermsOfService
  url: https://www.ninety.io/terms
- type: PrivacyPolicy
  url: https://www.ninety.io/privacy-policy
- type: Integrations
  url: https://www.ninety.io/integrations
- type: StatusPage
  url: https://status.ninety.io/
- type: TrustCenter
  url: https://trust.ninety.io/
- type: Authentication
  url: authentication/ninetyio-authentication.yml
- type: Conventions
  url: conventions/ninetyio-conventions.yml
- type: ErrorCatalog
  url: errors/ninetyio-problem-types.yml
- type: Lifecycle
  url: lifecycle/ninetyio-lifecycle.yml
- type: Conformance
  url: conformance/ninetyio-conformance.yml
- type: DataModel
  url: data-model/ninetyio-data-model.yml
- type: ChangeLog
  url: changelog/ninetyio-changelog.yml
- type: X-MCPServerCandidate
  url: mcp/ninetyio-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- type: LLMsTxt
  url: llms/ninetyio-llms.txt
- type: Overlay
  url: overlays/ninetyio-openapi-overlay.yaml
- type: AgentSkill
  url: skills/_index.yml
- type: Arazzo
  name: Create a Ninety Rock with Milestones
  url: arazzo/ninetyio-create-rock-with-milestones.yml
- type: Arazzo
  name: Log and Solve a Ninety Issue
  url: arazzo/ninetyio-log-and-solve-issue.yml
- type: AgenticAccess
  url: agentic-access/ninetyio-agentic-access.yml
- type: DomainSecurity
  url: security/ninetyio-domain-security.yml
x-enrichment:
  date: '2026-07-20'
  status: enriched
  artifacts_added: 23
  pass: local-v1

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