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Publish & Subscribe
Can I use catchup to retrieve older messages?
Do I need to create a PubNub object to send each message?
How to use PubNub's scalable MQTT Interface
What add-on features are available in PubNub?
Does PubNub support HTTP Streaming & Pipelining?
See all 9 articles
Why am I receiving "execution calls exceeds" error when I run my Function event handler?
How do I create a Function that keeps an accurate count using some increment functionality?
How do I prevent a published message from actually being published?
Why do my Functions pause or stop running?
What if UUID is not specified or undefined?
How do I disable leave events?
What SDK versions support channel presence?
Does a subscribe trigger a join event immediately?
Is a join event triggered twice on the same UUID?
See all 26 articles
What SDK versions support message history?
Can I retrieve prior presence events?
What is detailedHistory()?
Which SDKs support the message history feature?
How many stored messages can be retrieved?
See all 18 articles
Can channels of different keys be multiplexed?
How do I change a list of subscribed channels?
Does channel multiplexing support multiple callbacks?
How many channels does multiplexing support?
Channel Groups *
Can I subscribe to a channel group with no channels?
How do I add a channel to a channel group?
How do I remove a channel from a channel group?
How do I subscribe to a channel group?
What are channel groups?
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How do I enable wildcard subscribe for my PubNub keys?
How do I subscribe to a wildcard channel?
How many channel segments are supported with wildcard subscribe?
Mobile Push *
Can I send large messages via APN?
Can I use APNS and PubNub together?
Can I push to sandbox and production with the same key?
How do I register a device with a channel?
Can I set a time limit for a push notification?
See all 27 articles
Access Manager *
Can I make bulk access permission changes?
Does PubNub Access Manager apply to multiplexing?
Can I change a subscriber's auth key?
Does PubNub Access Manager apply to stored messages?
How long do granted access permissions last?
See all 20 articles