---
url: https://talkjs.com/docs/Data_APIs/
title: "Data APIs | TalkJS Docs"
---

For AI agents: Find a documentation index at https://talkjs.com/llms.txt (full content at https://talkjs.com/llms-full.txt). Get a markdown version of any page by appending .md to its URL path.

# Data APIs

Choose a Data API to build custom chat experiences.

The TalkJS Data APIs let you build fully custom chat UIs and interact with TalkJS data in real time. Use them to read, subscribe to, and update chat data directly from your application.

Looking for a ready-made chat UI? See the [UI Components](https://talkjs.com/docs/UI_Components/).

[

![JavaScript logo](https://talkjs.com/docs/js.svg)

### JavaScript Data API

Web or React Native



](https://talkjs.com/docs/Data_APIs/JavaScript/)[

![Kotlin logo](https://talkjs.com/docs/kotlin.svg)

### Kotlin Data API

Android



](https://talkjs.com/docs/Data_APIs/Kotlin/)[

![Swift logo](https://talkjs.com/docs/swift.svg)

### Swift Data API

iOS



](https://talkjs.com/docs/Data_APIs/Swift/)[

![Flutter logo](https://talkjs.com/docs/flutter.svg)

### Flutter Data API

Android



](https://talkjs.com/docs/Data_APIs/Flutter/)