OneSignal

API

Self-serve customer engagement API for push, email, SMS & in-app notifications

Overview

OneSignal API enables developers to programmatically send push notifications, emails, SMS, and in-app messages. Key endpoints include creating targeted notifications, managing user segments, tracking delivery metrics, and configuring communication channels. Responses are JSON-formatted. Use cases: Automate personalized engagement campaigns, integrate with CRM/analytics tools to trigger context-aware messages, monitor notification performance (opens, clicks), and manage multi-channel user communication at scale. It supports RESTful architecture for seamless integration into web and mobile applications.

Example Integration (JavaScript)

script.js JS


fetch('https://documentation.onesignal.com/docs/onesignal-api')
  .then(res => res.json())
  .then(data => console.log(data))
  .catch(err => console.error(err));

Key Features

RESTful API
JSON response format
Multi-channel support (push, email, SMS, in-app)
User segmentation endpoints
Delivery & engagement analytics
Programmatic campaign management

Frequently Asked Questions

? Is OneSignal free to use?

Yes, OneSignal offers a free tier with basic push notification features; advanced capabilities like SMS/email support and higher message volumes require paid plans.

? Does it require an API Key?

Yes, authentication uses a REST API key and App ID to securely access all API endpoints.

? What is the response format?

All API responses are in JSON format, making it easy to parse and integrate into applications.

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Tool Info

Pricing Freemium

Category Development

Platform Public API

Pros

⊕ Self-serve setup with intuitive documentation
⊕ Covers all major engagement channels in one API
⊕ Detailed delivery and user engagement analytics
⊕ Scalable for large user bases
⊕ Easy integration with web and mobile apps

Cons

⊖ Free tier has limitations on message volume and advanced features
⊖ SMS/email capabilities require paid plans
⊖ Rate limits apply to free users
⊖ Complex campaign setup may have a learning curve