---
updatedAt: 2026-10-21T14:19:16.000Z
agentTools:
  projectIndex: https://docs.frisbii.com/llms.txt
---

# API Domain Rebranding

As part of our evolution from Reepay and Billwerk to **Frisbii**, we are rolling out a comprehensive rebranding initiative that reflects our growth and expanded vision. Frisbii is a modern European-based recurring revenue management platform trusted by over 4,000 businesses in 95+ countries. With this rebranding, we're aligning our identity, infrastructure, and communications to better support our global customer base and our mission to simplify billing, subscription management and payment at scale.

:arrow\_right: [Learn more about the Frisbii rebranding](https://frisbii.com/about-frisbii/)

One of the key technical updates during this transition is the **domain change for our API services**.

## Dual Domain Availability

We are currently rebranding the primary API domain from:

* **`api.reepay.com`** → **`api.frisbii.com`**
* **`checkout-api.reepay.com`** → **`checkout-api.frisbii.com`**
* **`customer-portal-api.reepay.com`** → **`customer-portal-api.frisbii.com`**

Both domains are fully operational during this transition period. However, we **recommend that all developers and partners use`api.frisbii.com`, `checkout-api.frisbii.com`,`customer-portal-api.frisbii.com`** in new integrations and begin updating existing systems accordingly.

## Checkout domain

Frisbii Checkout is available on both `checkout.frisbii.com` and `checkout.reepay.com`. Both are fully supported, and existing integrations do not need to change anything.

* **Checkout JS SDK:** new integrations should load `https://checkout.frisbii.com/checkout.js`. Integrations that load `https://checkout.reepay.com/checkout.js` keep working. The JavaScript namespace is the same on both (`Reepay.EmbeddedCheckout`, `Reepay.ModalCheckout`, …).
* **Hosted checkout (Window Checkout, payment links):** always send the customer to the `url` returned when you create the session, and never build checkout URLs yourself. New accounts get `checkout.frisbii.com` URLs. Existing accounts continue on `checkout.reepay.com`; moving to `checkout.frisbii.com` is optional.
* **Content Security Policy and firewalls:** if you restrict scripts or frames, allow the checkout domain your integration uses. Allow both if you are unsure.