OneSignal

OneSignal is a lifecycle customer engagement platform for mobile push, web push, email, SMS/RCS, in-app messaging and iOS Live Activities, orchestrated through Journeys, segments and a single REST API at api.onesignal.com. It reports 1.3 trillion messages a year across 200k apps and 1.5 billion monthly active users. The developer surface is a published OpenAPI 3.1 contract, a full set of first-party server and client SDKs, a hosted OAuth-authenticated MCP server, an A2A agent card and six provider-published Agent Skills.

OneSignal publishes 6 API contracts indexed on the APIs.io network, including Apps API, Notifications API, Players API, and 3 more. Tagged areas include Notification, Push, Email, SMS, and Mobile.

The OneSignal catalog on APIs.io includes 1 event-driven AsyncAPI specification.

OneSignal’s developer surface includes authentication, engineering blog, changelog, CLI, documentation, API reference, getting-started guide, and 40 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

74.7/100 exemplar ▬ flat Agent 75/100 agent native Front door AI 6/6 dominant saas Full breakdown ↓
scored 2026-10-17 · rubric v0.24.0

AccessFreemiumSelf serve⚡ Free to try

2 published contracts 1 MCP Servers

Notification Push Email SMS Mobile Push Notifications Web Push Customer Engagement Marketing Automation Live Activities RCS In-App Messaging JourneysLifecycle MarketingMCP Agent Ready A2A

What this lets a business do 1

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

Marketing Management

BC-400

Notifications

POST /notifications?c=sms POST /notifications DELETE /notifications/{notification_id}

What people ask OneSignal 5

The questions people put to an LLM, and the jobs they hand an agent, that OneSignal's APIs answer — each one linked to the operation that does it. Generated by API Evangelist

OneSignal Apps API List all apps in my OneSignal account “Which OneSignal apps does my organization have?” Create a new app “How do I create a new OneSignal app through the API?” View one app's details “What settings and platform configuration does a single app have?” Update an app's name or push configuration “How do I rename an existing app?”

OneSignal Notifications API See which subscriptions received a message “Which subscriptions were sent or clicked a particular message?” Export a message's audience activity as CSV “How do I download delivered, clicked and unsubscribed data for a message across push, email and SMS?” Send an email message “How do I send an email campaign to a segment through OneSignal?” Send a push notification “How do I send a push notification with an image and action buttons?”

OneSignal Templates API View a message template's content “What content and channel does one of my message templates hold?” Permanently delete a message template “Can I delete a template that's still used in a Journey?” Update a push, email or SMS template “Do template edits take effect immediately for API sends?” Browse an app's message templates “Which message templates exist in my app?”

OneSignal Players API Export subscriptions to a CSV file “How do I download all my subscription data as a CSV?” Export all user data to CSV (legacy endpoint) “Is there an older, faster alternative to paging through every user record?”

OneSignal Organizations API List an organization's audit log events “Who changed settings in my OneSignal organization last week?”

Kin Score

Kin Score How this is scored →
scored 2026-10-17 · rubric v0.24.0

Composite quality — 74.7/100 · exemplar

Contract Quality 11.7 / 19

Developer Ergonomics 12.2 / 15

Access Clarity 12.8 / 15

Operational Transparency 8.2 / 10

Contract Governance 0.4 / 9

Discoverability 5.6 / 8

Regulatory Posture 4.5 / 15

Create-or-Update Ergonomics 6.1 / 10

Agent readiness — 75/100 · agent native

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 6 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 6 / 6

Agent Skills 5 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 8 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 6 / 6

Protected Resource Metadata 5 / 5

Registration Without a Human 6 / 6

Agentic Commerce Well-Known Document 0 / 5

Regulatory Posture applies to this provider. Its tags matched the Telecommunications 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/.

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/onesignal: 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 →

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
Communications (CPaaS)	covered	35.2	-	1
Martech and Customer Data Platforms	covered	35.2	-	1

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.

Standards implemented 2

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.

RCS

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

WebSub

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

APIs 6

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

OneSignal Apps API

The Apps API from OneSignal — 21 operation(s) for apps.

OneSignal Notifications API

The Notifications API from OneSignal — 4 operation(s) for notifications.

OneSignal Players API

The Players API from OneSignal — 1 operation(s) for players.

OneSignal Templates API

The Templates API from OneSignal — 3 operation(s) for templates.

OneSignal MCP Server

OneSignal's hosted Model Context Protocol server at https://api.onesignal.com/mcp/oauth, connected over browser-based OAuth 2.1 with PKCE. Listed in the Cursor marketplace and C...

OneSignal Organizations API

The Organizations API from OneSignal — 1 operation(s) for organizations.

Open Collections 6

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

API Collection

OPEN COLLECTION

OneSignal Apps API

OPEN COLLECTION

OneSignal Notifications API

OPEN COLLECTION

OneSignal Players API

OPEN COLLECTION

OneSignal Templates API

OPEN COLLECTION

OneSignal

OPEN COLLECTION

MCP Servers 1

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

OneSignal MCP

OneSignal ships two distinct remote MCP servers. The product server at api.onesignal.com/mcp/oauth is the one Cursor, Claude, Copilot and ChatGPT connect to; it is OAuth-gated, ...

MCP SERVER

Pricing Plans 1

Published pricing tiers and plan structures.

Onesignal Plans Pricing

4 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Onesignal Rate Limits

6 limits

RATE LIMITS

FinOps 1

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

Onesignal Finops

FINOPS

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Onesignal Webhooks

ASYNCAPI

OpenAPI Overlays 9

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.

Onesignal Apps Api Phrasing Overlay

43 actions · phrasing · onesignal-apps-api-openapi.yml

GENERATED

Onesignal Apps Overlay

9 actions · documentation · onesignal-apps-api-openapi.yml

GENERATED

Onesignal Notifications Api Phrasing Overlay

15 actions · phrasing · onesignal-notifications-api-openapi.yml

GENERATED

Onesignal Notifications Overlay

7 actions · documentation · onesignal-notifications-api-openapi.yml

GENERATED

Onesignal Organizations Api Phrasing Overlay

2 actions · phrasing · onesignal-organizations-api-openapi.yml

GENERATED

Onesignal Players Api Phrasing Overlay

3 actions · phrasing · onesignal-players-api-openapi.yml

GENERATED

Onesignal Players Overlay

5 actions · documentation · onesignal-players-api-openapi.yml

GENERATED

Onesignal Templates Api Phrasing Overlay

12 actions · phrasing · onesignal-templates-api-openapi.yml

GENERATED

Onesignal Templates Overlay

6 actions · documentation · onesignal-templates-api-openapi.yml

GENERATED

Scroll for all 9

Security Posture 4

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

Onesignal Authentication

http/oauth2 · 3 schemes

SECURITY

Onesignal Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Onesignal Vulnerability Disclosure

security.txt · contact published

SECURITY

Onesignal Trust Center

SOC 2 Type II, ISO 27001, ISO 27701, EU-U.S. Data Privacy Framework

SECURITY

Resources

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

SignUp

SignUp

Login

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

LlmsText

WellKnown

MCPServer

LLMsTxt

AgentSkill

Design & Contract 8

Pagination, idempotency, versioning, errors, and events

Conformance

ErrorCatalog

Lifecycle

Conventions

Idempotency

Components

DataModel

Webhooks

Scroll for all 8

Build 7

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

Packages

SDKs

ToolCrosswalk

CLI

Postman

PostmanCollection

PostmanCollection

Scroll for all 7

Access & Security 7

Authentication, authorization, and security posture

Authentication

Authentication

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

SecurityTxt

Compliance

TrustCenter

Security

Scroll for all 7

Operate 4

Status, limits, changes, and where to get help

RateLimits

StatusPage

ChangeLog

Support

Commercial 5

Pricing, plans, and the legal terms of use

Plans

FinOps

Pricing

TermsOfService

PrivacyPolicy

Company 3

The organization behind the API

LinkedIn

Website

Website

Blog

Blog

Other 2

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

AgentCard

AgentCard

Source (apis.yml)

aid: onesignal
url: https://raw.githubusercontent.com/api-evangelist/onesignal/refs/heads/main/apis.yml
name: OneSignal
kind: company
description: OneSignal is a lifecycle customer engagement platform for mobile push, web push, email, SMS/RCS, in-app messaging
  and iOS Live Activities, orchestrated through Journeys, segments and a single REST API at api.onesignal.com. It reports
  1.3 trillion messages a year across 200k apps and 1.5 billion monthly active users. The developer surface is a published
  OpenAPI 3.1 contract, a full set of first-party server and client SDKs, a hosted OAuth-authenticated MCP server, an A2A
  agent card and six provider-published Agent Skills.
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-08-13'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/onesignal.png
x-docs-platform: mintlify
x-docs-platform-confidence: high
x-docs-platform-checked: 2026-10-04
tags:
- Notification
- Push
- Email
- SMS
- Mobile
- Push Notifications
- Web Push
- Customer Engagement
- Marketing Automation
- Live Activities
- RCS
- In-App Messaging
- Journeys
- Lifecycle Marketing
- MCP
- Agent Ready
- A2A
tags_raw:
- Notifications
- Push
- Email
- SMS
- Mobile
- Push Notifications
- Web Push
- Customer Engagement
- Marketing Automation
- Live Activities
- RCS
- In-App Messaging
- Journeys
- Lifecycle Marketing
- MCP
- Agent Ready
- A2A
created: '2026-05-08'
modified: '2026-08-13'
specificationVersion: '0.23'
apis:
- aid: onesignal:onesignal-apps-api
  name: OneSignal Apps API
  description: The Apps API from OneSignal — 21 operation(s) for apps.
  humanURL: https://documentation.onesignal.com/reference
  baseURL: https://api.onesignal.com
  tags:
  - Application
  tags_raw:
  - Apps
  properties:
  - type: OpenAPI
    url: openapi/onesignal-apps-api-openapi.yml
  - type: Documentation
    url: https://documentation.onesignal.com/reference
  - type: Overlay
    url: overlays/onesignal-apps-overlay.yaml
- aid: onesignal:onesignal-notifications-api
  name: OneSignal Notifications API
  description: The Notifications API from OneSignal — 4 operation(s) for notifications.
  humanURL: https://documentation.onesignal.com/reference
  baseURL: https://api.onesignal.com
  tags:
  - Notification
  tags_raw:
  - Notifications
  properties:
  - type: OpenAPI
    url: openapi/onesignal-notifications-api-openapi.yml
  - type: Documentation
    url: https://documentation.onesignal.com/reference
  - type: Overlay
    url: overlays/onesignal-notifications-overlay.yaml
- aid: onesignal:onesignal-players-api
  name: OneSignal Players API
  description: The Players API from OneSignal — 1 operation(s) for players.
  humanURL: https://documentation.onesignal.com/reference
  baseURL: https://api.onesignal.com
  tags:
  - Player
  tags_raw:
  - Players
  properties:
  - type: OpenAPI
    url: openapi/onesignal-players-api-openapi.yml
  - type: Documentation
    url: https://documentation.onesignal.com/reference
  - type: Overlay
    url: overlays/onesignal-players-overlay.yaml
- aid: onesignal:onesignal-templates-api
  name: OneSignal Templates API
  description: The Templates API from OneSignal — 3 operation(s) for templates.
  humanURL: https://documentation.onesignal.com/reference
  baseURL: https://api.onesignal.com
  tags:
  - Templates
  properties:
  - type: OpenAPI
    url: openapi/onesignal-templates-api-openapi.yml
  - type: Documentation
    url: https://documentation.onesignal.com/reference
  - type: Overlay
    url: overlays/onesignal-templates-overlay.yaml
- aid: onesignal:onesignal-mcp
  name: OneSignal MCP Server
  description: OneSignal's hosted Model Context Protocol server at https://api.onesignal.com/mcp/oauth, connected over browser-based
    OAuth 2.1 with PKCE. Listed in the Cursor marketplace and Claude's connector directory. A second, anonymous documentation
    MCP server runs at https://documentation.onesignal.com/mcp and answered tools/list on probe.
  humanURL: https://documentation.onesignal.com/docs/en/onesignal-ai
  baseURL: https://api.onesignal.com/mcp/oauth
  tags:
  - MCP
  - Artificial Intelligence
  - Agents
  tags_raw:
  - MCP
  - AI
  - Agents
  properties:
  - type: MCPServer
    url: mcp/onesignal-mcp.yml
  - type: ToolCrosswalk
    url: mcp/onesignal-tool-crosswalk.yml
  - type: Authentication
    url: authentication/onesignal-authentication.yml
- aid: onesignal:onesignal-organizations-api
  name: OneSignal Organizations API
  description: The Organizations API from OneSignal — 1 operation(s) for organizations.
  humanURL: https://documentation.onesignal.com/reference
  baseURL: https://api.onesignal.com
  tags:
  - Organization
  tags_raw:
  - Organizations
  properties:
  - type: OpenAPI
    url: openapi/onesignal-organizations-api-openapi.yml
common:
- type: CapabilityMap
  url: capabilities/onesignal-capability-edges.yml
  name: OneSignal Business Capability Map
- type: Authentication
  url: authentication/onesignal-authentication.yml
- type: VulnerabilityDisclosure
  url: security/onesignal-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/onesignal-domain-security.yml
- type: GitHubOrganization
  url: https://github.com/OneSignal
- type: LinkedIn
  url: https://www.linkedin.com/company/onesignal
- type: Website
  url: https://onesignal.com/
- type: Plans
  url: plans/onesignal-plans-pricing.yml
- type: RateLimits
  url: rate-limits/onesignal-rate-limits.yml
- type: FinOps
  url: finops/onesignal-finops.yml
- type: Integrations
  url: https://onesignal.com/integrations
- type: LlmsText
  url: https://onesignal.com/llms.txt
- type: Blog
  url: https://onesignal.com/blog/feed
- type: Packages
  url: packages/onesignal-packages.yml
- type: SDKs
  url: packages/onesignal-packages.yml
- type: WellKnown
  url: well-known/onesignal-well-known.yml
- type: SecurityTxt
  url: well-known/onesignal-security.txt
- type: MCPServer
  url: mcp/onesignal-mcp.yml
- type: ToolCrosswalk
  url: mcp/onesignal-tool-crosswalk.yml
- type: AgentCard
  url: a2a/onesignal-a2a.yml
- type: LLMsTxt
  url: llms/onesignal-llms.txt
- type: Conformance
  url: conformance/onesignal-conformance.yml
- type: Compliance
  url: security/onesignal-trust-center.yml
- type: TrustCenter
  url: security/onesignal-trust-center.yml
- type: Security
  url: security/onesignal-vulnerability-disclosure.yml
- type: ErrorCatalog
  url: errors/onesignal-problem-types.yml
- type: Lifecycle
  url: lifecycle/onesignal-lifecycle.yml
- type: StatusPage
  url: https://status.onesignal.com
- type: Conventions
  url: conventions/onesignal-conventions.yml
- type: Idempotency
  url: conventions/onesignal-conventions.yml
- type: ChangeLog
  url: changelog/onesignal-changelog.yml
- type: CLI
  url: cli/onesignal-cli.yml
- type: Components
  url: components/onesignal-components.yml
- type: DataModel
  url: data-model/onesignal-data-model.yml
- type: Webhooks
  url: asyncapi/onesignal-webhooks.yml
- type: AgentSkill
  url: skills/_index.yml
- type: DeveloperPortal
  url: https://documentation.onesignal.com/
- type: Documentation
  url: https://documentation.onesignal.com/
- type: APIReference
  url: https://documentation.onesignal.com/reference
- type: GettingStarted
  url: https://documentation.onesignal.com/docs/en/quickstart-guide
- type: Support
  url: https://onesignal.com/contact
- type: Pricing
  url: https://onesignal.com/pricing
- type: SignUp
  url: https://dashboard.onesignal.com/signup
- type: Login
  url: https://dashboard.onesignal.com/login
- type: TermsOfService
  url: https://onesignal.com/tos
- type: PrivacyPolicy
  url: https://onesignal.com/privacy
- type: Postman
  url: https://www.postman.com/onesignaldevs
- type: PostmanCollection
  url: collections/onesignal.postman_collection.json
integrations:
- name: Adapty In-app subscriptions made profitable
- name: Brew Lovable for email marketing
- name: Mailgun The email service for developers
- name: Monkedo Monkey see, monkey do
- name: RudderStack Warehouse-native CDP
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
x-enrichment:
  date: '2026-08-13'
  status: enriched
  artifacts_added: 34
  pass: local-v1
x-a2a:
  verified: true
  probed: '2026-09-26'
  url: https://documentation.onesignal.com/.well-known/agent-card.json
  grade: conformant
  protocol_version: '0.3'
  control: 404

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https://apis.io/mcp

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get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
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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.
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