OneSignal REST API integrations and automation

Describe what should happen in OneSignal REST API, and when, in plain words. Whenever builds the workflow and runs it on a schedule, on a webhook, or when another app sends an event.

Connection requirements, provider permissions and optional AI usage apply. Read the runtime limits.

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OneSignal REST API on Whenever

About OneSignal REST API

The OneSignal REST API enables developers to programmatically send push notifications, emails, and SMS, manage users and subscriptions, and configure apps. OneSignal User Auth: OneSignal is a customer engagement platform offering push notifications, email, SMS, and in-app messaging services.

How Whenever connects

Through its API, using the credentials and permissions required by the provider.

Build it from your AI client

Connect Claude, Cursor or Codex to the Whenever MCP server and your coding agent can build and deploy the OneSignal REST API workflow. It runs on Whenever afterwards, on its schedule or webhook, with the chat closed.

Set up the Whenever MCP server