# HubSpot Calling Extensions API

**Canonical:** https://apis.io/apis/hubspot/hubspot-calling-extensions-api/  
**Provider:** HubSpot — https://apis.io/providers/hubspot/  
**Base URL:** https://api.hubapi.com  
**Documentation:** https://developers.hubspot.com/docs/guides/api/crm/extensions/calling-sdk

HubSpot Calling Extensions API is one of 93 APIs that [HubSpot](https://apis.io/providers/hubspot/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Calling, CRM, Extensions, and SDK. The published artifact set on APIs.io includes API documentation.

The calling extensions SDK enables apps to provide a custom calling option to HubSpot users directly from CRM records. The SDK facilitates bidirectional communication between calling applications and HubSpot, including call event messaging and automatic engagement record creation.

## Machine-readable artifacts (1)

- **Documentation** — https://developers.hubspot.com/docs/guides/api/crm/extensions/calling-sdk

## Other HubSpot APIs (12)

- [HubSpot Posts API](https://apis.io/apis/hubspot/hubspot-posts-api/)
- [HubSpot URL Redirects API](https://apis.io/apis/hubspot/hubspot-url-redirects-api/)
- [HubSpot Pipelines API](https://apis.io/apis/hubspot/hubspot-pipelines-api/)
- [HubSpot Products API](https://apis.io/apis/hubspot/hubspot-products-api/)
- [HubSpot Line Items API](https://apis.io/apis/hubspot/hubspot-line-items-api/)
- [HubSpot Quotes API](https://apis.io/apis/hubspot/hubspot-quotes-api/)
- [HubSpot CRM Properties API](https://apis.io/apis/hubspot/hubspot-crm-properties-api/)
- [HubSpot Owners API](https://apis.io/apis/hubspot/hubspot-owners-api/)
- [HubSpot CRM Imports API](https://apis.io/apis/hubspot/hubspot-crm-imports-api/)
- [HubSpot Custom Objects API](https://apis.io/apis/hubspot/hubspot-custom-objects-api/)
- [HubSpot Marketing Events API](https://apis.io/apis/hubspot/hubspot-marketing-events-api/)
- [HubSpot Forms API](https://apis.io/apis/hubspot/hubspot-forms-api/)

## Tags

Calling, CRM, Extensions, SDK

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/hubspot/hubspot-calling-extensions-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/hubspot/.