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 API contracts indexed 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.

The Ninety.io catalog on APIs.io includes 1 Spectral governance ruleset.

Ninety.io’s developer surface includes engineering blog, documentation, API reference, getting-started guide, support, pricing, signup flow, and 28 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

57.2/100 strong ▬ flat Agent 24/100 agent aware Front door AI 3/6 light Heartbeat 100/100 alive saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessFreemiumSelf serve⚡ Free to try

1 published contract 4 Agent Skills

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

What this lets a business do 3

Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →

Project & Portfolio Management

BC-900

Milestones

POST /v1/milestones

Strategic Management

BC-100

Rocks

Financial Planning & Analysis

BC-230

Scorecard

POST /v1/scorecard/kpis/query POST /v1/scorecard/kpis/{kpiId}/scores

Kin Score

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

Composite quality — 57.2/100 · strong

Contract Quality 8.4 / 19

Developer Ergonomics 7.4 / 15

Access Clarity 12.8 / 15

Operational Transparency 3.6 / 10

Contract Governance 1.6 / 9

Discoverability 5.5 / 8

Regulatory Posture 4.4 / 15

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

Pagination 0 / 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 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.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

Show this score on your site.

It updates itself when the score changes. Paste this where you link to your API docs:

<a href="https://apis.io/providers/ninetyio/"><img src="https://apis.io/badge/ninetyio/card.svg" alt="Ninety.io on APIs.io — Kin Score by API Evangelist"></a>

Other styles, a README pill and a shields.io endpoint are on the badge page.

Raise your score.

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

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
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)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented)

8 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 44.7 — up to +13.8 composite points
Developer Ergonomics scores 49.4 — up to +10.1 composite points
Contract Governance scores 18.2 — up to +9.8 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/ninetyio/apis.yml: open an issue on github.com/api-evangelist/ninetyio 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 →

Standards implemented 1

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

OpenAPI

measured — observed by APIs.io (published)

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 7

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

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 7

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

Agent Skills 4

Packaged agent skills for driving this provider's APIs from an AI assistant.

Manage Ninety Issues

AGENT SKILL

Manage Ninety Rocks and Milestones

AGENT SKILL

Manage Ninety To-Dos

AGENT SKILL

Update Ninety Scorecard

AGENT SKILL

Ninety.io API pricing

Prices published by Ninety.io, read 2026-10-28 from www.ninety.io/ninety-pricing.

Plan	Price
Free	$0 USD/ user/ month Includes: V/TO®, Accountability Chart®, Baseline & Org Fit Assessments, EOS Toolbox™, Knowledge Portal (Read O
Essentials	$12 USD/ user/ month Includes: Everything in Free plus L10 Meetings, Scorecard, Rocks, To-Dos, Issues, Mobile App, integrations
Accelerate	$14 USD/ user/ month Includes: Everything in Essentials plus Insights, Custom Meetings, Quarterly & Annual Meetings/Reviews, People
Thrive	$16 USD/ user/ month Includes: Everything in Accelerate plus Maz AI, Knowledge Portal creation, Process documentation, Custom Asses

Plan details, limits and sources →

Billed by: user · FinOps profile →

Pricing Plans 2

Published pricing tiers and plan structures.

Ninetyio Plans Pricing

4 plans

PLANS

Ninetyio Price Estimates

0 plans

PLANS

Service Levels 1

Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.

Ninety.io

SLA

FinOps 1

Cost, billing, and metering signals for API financial operations.

Ninetyio Finops

FINOPS

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Ninety.io API Rules

54 rules · 47 errors 4 warnings 3 info

SPECTRAL

OpenAPI Overlays 1

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

Ninetyio Openapi Overlay

3 actions · update · ninetyio-openapi-original.json

DERIVED

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 · 15 acting · 15 human-in-the-loop

25 operations · 15 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 4

Pricing, plans, and the legal terms of use

Plans

Pricing

TermsOfService

PrivacyPolicy

Company 4

The organization behind the API

Blog

BlogRSS

Website

Blog

Other 2

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

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: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Freemium · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-06'
  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: '2026-10-06'
tags:
- Company
- EOS
- Entrepreneurial Operating System
- Business Management
- Meetings
- Productivity
- Scorecards
- Team Management
- Goal Tracking
tags_raw:
- 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:
  - Scorecards
  tags_raw:
  - 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: Plans
  url: plans/ninetyio-plans-pricing.yml
- url: https://www.ninety.io/eos/blog
  type: Blog
- url: https://www.ninety.io/eos/blog/rss.xml
  type: BlogRSS
- type: CapabilityMap
  url: capabilities/ninetyio-capability-edges.yml
  name: Ninety.io Business Capability Map
- 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

Ninety.io API — frequently asked questions

Does Ninety.io have an API?

Yes. APIs.io lists 7 APIs from Ninety.io, including Ninety.io Issues API, Ninety.io Milestones API and Ninety.io Rocks API, and 4 more.

Is there an OpenAPI specification for the Ninety.io API?

Yes. APIs.io indexes 7 OpenAPI specifications for Ninety.io, each linked for download from this page.

How do I authenticate with the Ninety.io API?

Ninety.io uses bearer-token authentication (http · 1 scheme). The details are profiled on APIs.io as Ninetyio Authentication.

How much does the Ninety.io API cost?

Ninety.io publishes its prices; its Free plan is $0 USD/ user/ month as of 2026-10-28. APIs.io lists 4 pricing plans for Ninety.io, with each plan's price, limits and inclusions under Pricing on this page.

Is the Ninety.io API ready for AI agents?

Ninety.io has a Kin Score of 57.2 out of 100 (strong) and an Agent Readiness score of 24.3 (agent-aware), scored by API Evangelist on 2026-11-06.

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for providers

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

Call it yourself

curl for this page

This provider

curl "https://apis.io/api/v1/providers/ninetyio"

All providers

curl "https://apis.io/api/v1/providers?limit=25"

Every operation they expose

curl "https://apis.io/api/v1/providers/ninetyio/operations?limit=25"

How their score was established

curl "https://apis.io/api/v1/providers/ninetyio/evidence"

Calls without X-API-Key need no key. Calls with it need a paid plan — get a key.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.