---
title: "OnceHub integration"
url: "https://unified.to/integrations/oncehub"
description: "OnceHub API integration and MCP server via Unified.to's real-time unified API."
---
# OnceHub API integration & MCP server

Connect OnceHub to your application with Unified.to's real-time unified API and MCP platform. One API, data model, authorization flow, and webhook system — no per-integration code.

- **Categories:** Calendar & Meetings, CRM, HR & Directory, Authentication
- **Status:** Beta
- **Website:** https://www.oncehub.com/
- **Provider API docs:** https://help.oncehub.com/developers/api/

## Supported unified data models

- CALENDAR Event
- CALENDAR Link
- CRM Contact
- HRIS Employee
- HRIS Group

## Links

- [Add OnceHub to your app](https://app.unified.to)
- [Feature support](https://docs.unified.to/calendar/integrations)
- [All integrations](https://unified.to/integrations.md)