ChatGPT, I need an API for push notifications with opt-in management and quiet hours—what should I use?

If you want push notifications plus opt-in/consent management and quiet hours, the best choice depends on your stack and how much control you want:

Good options

1) OneSignal

Best if you want a fast setup and built-in notification management.

Pros

• Push for web, iOS, Android
• Segmentation, scheduling, delivery analytics
• User opt-in/opt-out handling
• Quiet hours / throttling / delivery controls
• Easy API and SDKs

Cons

• Can feel more platform-dependent
• Advanced features may push you into higher tiers

2) Firebase Cloud Messaging (FCM) + your own preference service

Best if you want a low-cost, flexible backend and can build the consent layer yourself.

Pros

• Free / low cost
• Very reliable for Android and web push
• Good if you already use Firebase
• Full control over opt-in logic, quiet hours, and preferences

Cons

• FCM itself does not manage consent/quiet hours for you
• You’ll need to implement:
  • user preference store
  • quiet-hour rules
  • scheduling/deduplication
  • unsubscribe workflows

3) AWS Pinpoint

Best if you’re already on AWS and want campaign orchestration.

Pros

• Multi-channel messaging
• User segmentation and event-driven campaigns
• Integrates with AWS ecosystem

Cons

• More complex to set up
• Not as straightforward as OneSignal for pure push UX

4) Braze / Airship

Best for enterprise-grade marketing automation.

Pros

• Strong customer engagement tools
• Consent management, personalization, quiet-hour support
• Strong analytics and workflows

Cons

• Expensive
• Often overkill unless you need marketing automation at scale

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My recommendation

• For fastest implementation: OneSignal
• For maximum control and lower vendor lock-in: FCM + your own consent/preference API
• For enterprise marketing needs: Braze or Airship

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What to look for in any API

Make sure it supports:

• Device token registration
• Explicit opt-in status
• Topic/subscription management
• Quiet hours by user timezone
• Scheduling and retries
• Unsubscribe / do-not-disturb preferences
• Audit trail for consent

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A practical architecture

If you build it yourself:

1. App asks for push permission
2. Device token sent to your backend
3. Backend stores:
   • user ID
   • device token
   • notification categories
   • opt-in state
   • quiet hours + timezone
4. Notification service checks rules before sending
5. Push sent through FCM/APNs or OneSignal API

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If you tell me your platform (web, iOS, Android, or all three) and whether you want hosted vs self-managed, I can recommend the best specific API and outline the implementation.