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HubSpot offers a number of web and mobile SDKs for extending the functionality of certain supported features, like creating a custom calling app, or leveraging the HubSpot tracking code on your website to customize the behavior of certain tools.
The SDKs covered in this overview are distinct from the REST client libraries, such as the Node.js client library, which are language-specific packages that provides wrapper functions for REST API requests to HubSpot.

Tracking code SDKs

The following SDKs extend the functionality of the HubSpot tracking code. After you’ve installed the tracking code on your website, you can use the SDKs below to track specific behavior when users visit your site, and build on the default functionality offered by supported HubSpot tools.

Conversations SDK

Customize the behavior of the live chat widget.

Cookie banner SDK

Enable or disable different analytics scripts based on user preferences.

CTAs SDK

Programmatically control HubSpot CTAs on your website.

Global form events

Define custom behavior when users interact with forms on your site.

Calling SDK

The calling SDK allows you to wire up a custom calling functionality directly in HubSpot.

Calling SDK

Provide a custom calling option on a CRM record.

Receive incoming calls

Extend a custom calling app to receive calls in HubSpot.

Third-party calls in help desk

Set up third-party calling in help desk.

Mobile chat SDKs

Use the mobile chat SDKs to integrate your mobile app with HubSpot’s live chat features.

Android chat SDK

Integrate your Android app with HubSpot’s live chat.

iOS chat SDK

Integrate your iOS app with HubSpot’s live chat.
Last modified on March 31, 2026