---
source_url: https://www.pubnub.com/docs/faq
title: PubNub FAQ
updated_at: 2026-10-27T09:13:26.000Z
---

# PubNub FAQ

> For AI agents: documentation index at https://www.pubnub.com/llms-full.txt

Short answers to common questions about every part of the PubNub platform, from your first keyset to billing.

Popular:

* [HTTP 499 and 403 errors](https://www.pubnub.com/docs/faq/architecture.md#what-is-an-http-499-status-code)
* [Timetokens](https://www.pubnub.com/docs/faq/pub-sub.md#how-do-i-convert-a-timetoken-to-a-unix-timestamp)
* [Access Manager](https://www.pubnub.com/docs/faq/security.md#what-is-access-manager)
* [Monthly active users](https://www.pubnub.com/docs/faq/pricing.md#what-are-monthly-active-users)

## Browse by topic

### Getting started

Keys, User IDs, SDKs, and first setup.

[View FAQ for Getting started →](https://www.pubnub.com/docs/faq/getting-started.md)

### Architecture

Connections, networking, and HTTP errors.

[View FAQ for Architecture →](https://www.pubnub.com/docs/faq/architecture.md)

### Pub/Sub

Publishing, ordering, and receiving messages.

[View FAQ for Pub/Sub →](https://www.pubnub.com/docs/faq/pub-sub.md)

### Presence

Who is online, events, and occupancy.

[View FAQ for Presence →](https://www.pubnub.com/docs/faq/presence.md)

### Data storage

Message history, files, and DataSync.

[View FAQ for Data storage →](https://www.pubnub.com/docs/faq/data-storage.md)

### Logic

Functions behavior and moderation.

[View FAQ for Logic →](https://www.pubnub.com/docs/faq/logic.md)

### Security

Access Manager, keys, encryption, compliance.

[View FAQ for Security →](https://www.pubnub.com/docs/faq/security.md)

### Pricing

Plans, billing, and usage.

[View FAQ for Pricing →](https://www.pubnub.com/docs/faq/pricing.md)

### Integrations

Mobile push notifications with APNs and FCM.

[View FAQ for Integrations →](https://www.pubnub.com/docs/faq/integrations.md)

Last updated at: 2026-10-27T09:13:26.000Z