ntfy

ntfy provides a simple HTTP‑based publish‑subscribe notification service that lets developers send push notifications to phones, desktops, or other devices via a straightforward REST API or command‑line tools. It is open‑source, self‑hostable, and offers both a hosted service at ntfy.sh and a Docker image for private deployments. Features include topic‑based messaging, message retention, access control, and integration with mobile apps for Android, iOS, and desktop platforms.

ntfy is profiled on the APIs.io network. Tagged areas include Notifications, Open Source, Self‑hostable, Pub‑Sub, and API.

ntfy’s developer surface includes changelog, engineering blog, documentation, and 10 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

15.4/100 emerging Agent 0/100 human only Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

0 APIs

NotificationsOpen SourceSelf‑hostablePub‑SubAPI

Kin Score

Kin Score How this is scored →
scored 2026-10-31 · rubric v0.25.0

Composite quality — 15.4/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 3.2 / 17

Access Clarity 1.8 / 17

Operational Transparency 4.7 / 11

Contract Governance 0.0 / 10

Discoverability 4.1 / 9

Regulatory Posture 1.5 / 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

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)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0

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
Access Clarity scores 10.5 — up to +17.9 composite points
Developer Ergonomics scores 19.0 — up to +16.2 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/ntfy/apis.yml: open an issue on github.com/api-evangelist/ntfy 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 →

Security Posture 1

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

Ntfy Domain Security

TLSv1.3

SECURITY

Resources

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

WellKnown

WellKnown

Build 2

SDKs, sample code, and the tooling you integrate with

SDKs

SDKs

Packages

Packages

Access & Security 2

Authentication, authorization, and security posture

SecurityTxt

SecurityTxt

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

StatusPage

StatusPage

ChangeLog

ChangeLog

Commercial 1

Pricing, plans, and the legal terms of use

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Blog

Blog

Website

Website

Other 2

Properties that don't map to a standard resource type

Vendors

Vendors

Hosts

Hosts

Source (apis.yml)

aid: ntfy
name: ntfy
image: https://ntfy.sh/static/img/ntfy.png
description: ntfy provides a simple HTTP‑based publish‑subscribe notification service that lets developers send push notifications
  to phones, desktops, or other devices via a straightforward REST API or command‑line tools. It is open‑source, self‑hostable,
  and offers both a hosted service at ntfy.sh and a Docker image for private deployments. Features include topic‑based messaging,
  message retention, access control, and integration with mobile apps for Android, iOS, and desktop platforms.
url: https://raw.githubusercontent.com/api-evangelist/ntfy/refs/heads/main/apis.yml
x-type: company
x-source: harvest:new-submission
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-27 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-26'
modified: '2026-10-26'
tags:
- Notifications
- Open Source
- Self‑hostable
- Pub‑Sub
- API
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: SecurityTxt
  url: well-known/ntfy-ntfy-security.txt
- type: WellKnown
  url: well-known/ntfy-well-known.yml
- type: Vendors
  url: vendors/ntfy-vendors.yml
- type: Hosts
  url: hosts/ntfy-hosts.yml
- type: SDKs
  url: packages/ntfy-packages.yml
- type: Packages
  url: packages/ntfy-packages.yml
- type: StatusPage
  url: https://ntfy.statuspage.io/
- type: PrivacyPolicy
  url: https://docs.ntfy.sh/privacy/
- type: ChangeLog
  url: https://docs.ntfy.sh/releases/
- type: Blog
  url: https://blog.ntfy.sh/
- type: Documentation
  url: https://docs.ntfy.sh/
- type: DomainSecurity
  url: security/ntfy-domain-security.yml
- type: Website
  url: https://ntfy.sh/
apis: []
x-submission-probe: 200 2026-10-25
x-coverage:
  state: unreadable
  reason: no-machine-readable-spec
  detail: No OpenAPI or other machine‑readable contract was found despite public documentation.
  evidence:
  - url: https://ntfy.sh/api-docs
    status: 200
  checked: '2026-10-27'
x-enrichment:
  date: '2026-10-27'
  status: enriched
  artifacts_added: 10
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

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