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.
Reference-quality API operations across every facet — a rich contract, published governance, transparent operations, and machine-readable commercial terms.
API Evangelist profiles OneSignal the way a machine reads it — 27 machine-readable artifacts across 2 APIs, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.
Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — OneSignal scores 80.0/100 (exemplar), with a separate agent-readiness read of 70/100 (agent native). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
Kin Score
This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance. Every facet and dimension name is a link: it opens that measurement's page on APIs.io, where the rating runs across the whole catalog — the exact checks that feed it, how every profiled provider distributes on it, and who is at the top of it.
Kin Score
How this is scored →scored 2026-09-08 · rubric v0.20.0
Put this on your own site. The badge is drawn live from OneSignal's current Kin Score — paste it once and it updates itself every time the score is recomputed. It follows your visitor's light or dark setting, and it links back here so anyone who sees it can read the full breakdown.
<!-- Kin Score · API Evangelist -->
<a href="https://providers.apievangelist.com/providers/onesignal/"
title="OneSignal on API Evangelist — API profile and Kin Score">
<img src="https://apis.io/badge/onesignal.svg"
alt="OneSignal Kin Score — API readiness rating by API Evangelist" width="150" height="150" loading="lazy">
</a>[](https://providers.apievangelist.com/providers/onesignal/)<!-- Kin Score · API Evangelist -->
<a href="https://providers.apievangelist.com/providers/onesignal/"
title="OneSignal on API Evangelist — API profile and Kin Score">
<img src="https://apis.io/badge/onesignal/card.svg"
alt="OneSignal Kin Score — API readiness rating by API Evangelist" width="340" height="120" loading="lazy">
</a>More shapes, themes and sizes → · Score as JSON · How badges work
How we profile OneSignal
Each block below is one kind of artifact we hold for OneSignal. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.
APIs 11
Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.
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 Notifications?app Id={app Id}&limit={limit}&offset={offset}&kind={kind}&template Id={template Id}&time Offset={time Offset} API
The Notifications?app Id={app Id}&limit={limit}&offset={offset}&kind={kind}&template Id={template Id}&time Offset={time Offset} API from OneSignal — 1 operation(s) for notificat...
OneSignal Notifications?c=email API
The Notifications?c=email API from OneSignal — 1 operation(s) for notifications?c=email.
OneSignal Notifications?c=push API
The Notifications?c=push API from OneSignal — 1 operation(s) for notifications?c=push.
OneSignal Notifications?c=sms API
The Notifications?c=sms API from OneSignal — 1 operation(s) for notifications?c=sms.
OneSignal Organizations API
The Organizations API from OneSignal — 1 operation(s) for organizations.
OneSignal Templates?app Id={app Id}&limit={limit}&offset={offset} API
The Templates?app Id={app Id}&limit={limit}&offset={offset} API from OneSignal — 1 operation(s) for templates?app id={app id}&limit={limit}&offset={offset}.
Scroll within the panel for all 11 ·
Open Collections 6
Open, tool-agnostic collections carry the same runnable value as Postman without locking you to one client — the portable, forkable form of the same exercise.
Open, tool-agnostic API collections (OpenAPI-derived and Bruno).
API Collection
OPEN COLLECTIONOneSignal Apps API
OPEN COLLECTIONOneSignal Notifications API
OPEN COLLECTIONOneSignal Players API
OPEN COLLECTIONOneSignal Templates API
OPEN COLLECTIONOneSignal
OPEN COLLECTIONMCP Servers 1
Model Context Protocol servers expose these APIs directly to AI agents. We profile them because agent-native access is the fastest-growing way this provider's capabilities actually get used.
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 SERVERGraphQL 1
Where a provider ships GraphQL, the schema is the contract. We profile it alongside the REST surface so the whole interface is legible in one place.
GraphQL schemas published by this provider.
OneSignal GraphQL Schema
Conceptual GraphQL schema for the OneSignal multi-channel customer engagement platform, derived from the OneSignal REST API v1 (https://documentation.onesignal.com/reference).
GRAPHQLPricing Plans 1
Pricing is part of the interface. Machine-readable plans tell you what a tier costs and includes before you commit — one of the things the Kin Score reads for access clarity — renamed from commercial clarity in rubric 0.12, because a free statutory interface has access terms and no commercial ones.
Published pricing tiers and plan structures.
Rate Limits 1
Rate limits are the difference between a demo that works and a production integration that doesn't fall over. Publishing them is an operational-transparency signal — and a hard requirement for any agent that plans its own throughput.
Documented rate limits and quota policies.
Onesignal Rate Limits
RATE LIMITSFinOps 1
Cost, billing, and metering signals let a buyer model the financial operations of an API before it's live. We profile them for the same reason we profile pricing: the money is part of the contract.
Cost, billing, and metering signals for API financial operations.
Onesignal Finops
FINOPSEvent Specifications 1
Not every API is request/response. AsyncAPI describes the event-driven and streaming side — the webhooks and channels — so the asynchronous half of the interface is documented the same way the synchronous half is.
AsyncAPI definitions for this provider's event-driven and streaming APIs.
Onesignal Webhooks
ASYNCAPISecurity Posture 4
Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Resources
Every other property we hold for OneSignal — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.
Get Started 4
Portal, sign-up, and the first successful call
Documentation 2
Reference material describing how the API behaves
Agent Surfaces 5
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 8
Pagination, idempotency, versioning, errors, and events
Scroll within the panel for all 8 ·
Build 7
SDKs, sample code, and the tooling you integrate with
Scroll within the panel for all 7 ·
Access & Security 7
Authentication, authorization, and security posture
Scroll within the panel for all 7 ·
Operate 4
Status, limits, changes, and where to get help
Commercial 5
Pricing, plans, and the legal terms of use
Company 3
The organization behind the API
Other 2
Properties that don't map to a standard resource type
← All providers · Data indexed from github.com/api-evangelist/onesignal · machine-readable index on apis.io
This is an independent, third-party profile of OneSignal, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.
The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.
Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.
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