# Introduction

{% hint style="info" %}
MPush is a client library, written in Swift, that can be used to interact with the MPush API. The minimum deployment target for the library is iOS 11.0.
{% endhint %}

MPush uses a classic Pub/Sub pattern, you will register your device to topics, then from the MPush APIs you will be able to send notifications to those topics and all device registered will receive a notification.

A topic can represent whatever you want in your system (e.g. the entire app, a user a subset of user with a common characteristic) so you will be able to choose the granularity of the notifications.

### Minimum Requirements

* [Swift 4.0+](https://github.com/pusher/push-notifications-swift/commit/d6dfa2186195135d8d7d1e3d3efdd7f8661ea404)
* [Xcode](https://itunes.apple.com/us/app/xcode/id497799835) - The easiest way to get Xcode is from the [App Store](https://itunes.apple.com/us/app/xcode/id497799835?mt=12), but you can also download it from [developer.apple.com](https://developer.apple.com/) if you have an AppleID registered with an Apple Developer account.


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.mpush.cloud/ios-sdk/introduction.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.