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
50.0/100 developing ▬ flat Agent 65/100 agent native Full breakdown ↓
scored 2026-07-27 · rubric v0.5
AccessSelf serve
7 APIs 1 MCP Servers
CompanyEOSEntrepreneurial Operating SystemBusiness ManagementMeetingsProductivityScorecardTeam ManagementGoal Tracking

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 50.0/100 · developing
Contract Quality 12.9 / 25
Developer Ergonomics 11.7 / 20
Commercial Clarity 10.5 / 20
Operational Transparency 4.8 / 13
Governance 0.0 / 12
Discoverability 10.0 / 10
Agent readiness — 65/100 · agent native
Machine-Readable Contract 18 / 18
Agentic Access Contract 15 / 15
MCP Server 12 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 8 / 8
Request/Response Examples 0 / 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
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/ninetyio: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

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

Arazzo Workflows 3

Multi-step API workflows described with the Arazzo specification.

_Index

ARAZZO

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

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

ninetyio-mcp.yml

MCP SERVER

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
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

MCPServer
MCPServer
 LLMsTxt
LLMsTxt
 AgentSkill
AgentSkill
 AgenticAccess
AgenticAccess

Design & Contract 7

Pagination, idempotency, versioning, errors, and events

Conventions
Conventions
 ErrorCatalog
ErrorCatalog
 Lifecycle
Lifecycle
 Conformance
Conformance
 DataModel
DataModel
 Arazzo
Arazzo
 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
Support
 HelpCenter
HelpCenter
 Community
Community
 Roadmap
Roadmap
 StatusPage
StatusPage
 ChangeLog
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)

apis.yml Raw ↑ 
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
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  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: '0.20'
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:
  - 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:
  - 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: MCPServer
  url: mcp/ninetyio-mcp.yml
- 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