# Create a subscription
> **Open beta feature**
>
> This is an open beta feature, which means you won’t see it available in your organization until you opt in. If you’re interested in joining this beta, [talk to a Redoxer](https://redoxengine.com/forms/contact-us/) to find out if you’d be a good fit.
A **subscription** links a source, destination, and data model to define how and what data is exchanged between two organizations. [Learn about subscriptions](https://docs.redoxengine.com/permalink/5k6U4ofmE0bKPBk4fhRcj5/#what-are-subscriptions). We support creating a **one-party subscription**, which means your organization needs to own both the source _and_ destination.
Specifically, this article is for **cloud connectivity** users who want to hydrate a cloud environment. For non-cloud users, [learn how to request a connection](/how-to-use-redox/manage-your-redox-setup/request-a-connection-or-subscription) instead to expand your integration with a new or existing partner.
## Prerequisites
- A user must be assigned to an engineer role to create a subscription. [Learn about user roles](/basics/managing-access-for-your-redox-organization/what-are-user-roles).
- Create a source that sends and normalizes your HL7v2 feed to FHIR. [Learn how to set up sources](/how-to-use-redox/manage-your-redox-setup/set-up-sources).
- Create and verify your cloud destination. [Learn how to set up destinations](/how-to-use-redox/manage-your-redox-setup/set-up-destinations). Your source and cloud destination must be fully configured (i.e., not “**in progress**” status) before you can create a subscription.
## Create a subscription
Follow these steps to create a new subscription to hydrate your cloud environment.
1. Log in to the Redox dashboard.
2. From the navigation menu, click the **Connections** page.
3. Click either the **Connected orgs** or **All subscriptions** tab. From either tab, click the **New subscription** button in the top-right corner.
*New subscription button on the Connected orgs tab*
*The New subscription button on the All subscriptions tab*
4. A modal opens. Fill out these fields:
1. Subscription name: Enter a human-readable **name** for the subscription.
2. Source: From the drop-down options, select the **source** that will initiate the data exchange.
3. Destination: From the drop-down options, select the **destination** where the data will be delivered.
4. Data models: From the list, select **Redox FHIR data model(s)**. Or, you can type in names to filter the list.
A new subscription is created for each data model you select. In other words, if you select 2 data models, 2 subscriptions are created. You can create up to 6 subscriptions at a time.
> **What’s a Redox data model?**
>
> As a reminder, a Redox data model is the schema that will be used to normalize data during the exchange. FHIR data models start are prepended with `FHIR`.
> **Unique combinations for subscriptions**
>
> A subscription must have a unique combination of source, destination, and data model. In other words, you can’t have two subscriptions with the same source, destination, and data model.
>
> You could use the same source and destination in multiple subscriptions, but then the data model must be unique.
See these API specs to see a full list of available FHIR data models.
1. [Redox FHIR API resources](https://docs.redoxengine.com/permalink/fhir-resources-landing-page)
2. [Redox FHIR notifications](https://docs.redoxengine.com/permalink/fhir-notification-landing-page)
5. Click the **Create** button.
*Create a new subscription*
6. The new subscription appears in the table. You can edit the subscription name or review any subscription details (including asset links) by clicking the **subscription** name.