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 5 APIs on the APIs.io network, including REST API, Apps API, Notifications API, and 2 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 39 more developer resources.

🌐 Visit website 📡 Source on GitHub

78.8/100 exemplar ▬ flat Agent 57/100 agent native Full breakdown ↓
scored 2026-08-20 · rubric v0.12.0

AccessFreemiumSelf serve⚡ Free to try

6 APIs 1 MCP Servers

NotificationPushEmailSMSMobilePush NotificationsWeb PushCustomer EngagementMarketing AutomationLive ActivitiesRCSIn-App MessagingJourneysLifecycle MarketingMCPAgent Ready

Kin Score

Kin Score How this is scored →
scored 2026-08-20 · rubric v0.12.0

Composite quality — 78.8/100 · exemplar

Contract Quality 16.3 / 21

Developer Ergonomics 13.4 / 17

Access Clarity 15.9 / 17

Operational Transparency 9.3 / 11

Contract Governance 1.7 / 10

Discoverability 7.9 / 9

Regulatory Posture 7.5 / 15

Agent readiness — 57/100 · agent native

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 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 3 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

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.

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/.

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/onesignal: 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 6

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

OneSignal REST API

The complete OneSignal REST API as OneSignal publishes it — OpenAPI 3.1.0, info.version 11.6, 39 paths and 59 operations covering messaging, users, subscriptions, segments, temp...

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...

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

GraphQL 1

GraphQL schemas published by this provider.

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.

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 1

Properties that don't map to a standard resource type

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.
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
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
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
created: '2026-05-08'
modified: '2026-08-13'
specificationVersion: '0.23'
apis:
- aid: onesignal:onesignal-rest-api
  name: OneSignal REST API
  description: The complete OneSignal REST API as OneSignal publishes it — OpenAPI 3.1.0, info.version 11.6, 39 paths and
    59 operations covering messaging, users, subscriptions, segments, templates, custom events, inbox, exports, apps, API
    keys and audit logs. Harvested verbatim from https://documentation.onesignal.com/openapi.json on 2026-08-13; servers[]
    names https://api.onesignal.com.
  humanURL: https://documentation.onesignal.com/reference
  baseURL: https://api.onesignal.com
  tags:
  - Notification
  - User
  - Subscription
  - Segments
  - Templates
  - Messaging
  tags_raw:
  - Notifications
  - Users
  - Subscriptions
  - Segments
  - Templates
  - Messaging
  properties:
  - type: OpenAPI
    url: openapi/_original/onesignal-api-openapi.json
  - type: Documentation
    url: https://documentation.onesignal.com/reference
  - type: APIReference
    url: https://documentation.onesignal.com/reference/rest-api-overview
  - type: DataModel
    url: data-model/onesignal-data-model.yml
  - type: ErrorCatalog
    url: errors/onesignal-problem-types.yml
  - type: Conventions
    url: conventions/onesignal-conventions.yml
  - type: Authentication
    url: authentication/onesignal-authentication.yml
- 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: GraphQL
    url: graphql/onesignal-graphql.md
  - 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: GraphQL
    url: graphql/onesignal-graphql.md
  - 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:
  - Players
  properties:
  - type: OpenAPI
    url: openapi/onesignal-players-api-openapi.yml
  - type: Documentation
    url: https://documentation.onesignal.com/reference
  - type: GraphQL
    url: graphql/onesignal-graphql.md
  - 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: GraphQL
    url: graphql/onesignal-graphql.md
  - 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
common:
- 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

OneSignal

APIs 6

Open Collections 6

MCP Servers 1

GraphQL 1

Pricing Plans 1

Rate Limits 1

FinOps 1

Event Specifications 1

Security Posture 4

Get Started 4

Documentation 2

Agent Surfaces 5

Design & Contract 8

Build 7

Access & Security 7

Operate 4

Commercial 5

Company 3

Other 1

Source (apis.yml)