> ## Documentation Index
> Fetch the complete documentation index at: https://docs.arbitrageone.de/llms.txt
> Use this file to discover all available pages before exploring further.

# Connecting a "PrepBusiness" Prep Center to ArbitrageOne

> Connect PrepBusiness as a Prep Center to ArbitrageOne.

**Step 1: Log in to the Prep Center portal**

Log in to the **Prep Center portal** and click your profile picture in the top right. Select **"Your Profile"** and then the **"Api"** tab.

<img src="https://mintcdn.com/arbitrageonegmbh/NZo3nUkop3rLRZd_/articles/erste-schritte/images/prep_business_1.png?fit=max&auto=format&n=NZo3nUkop3rLRZd_&q=85&s=cbce9f8630d44bbc7841a109d62ff0e1" alt="" width="2874" height="1170" data-path="articles/erste-schritte/images/prep_business_1.png" />

**Step 2: Create an API token**

Under **"Create API Token"**, enter a **Token Name** (e.g. *ArbitrageOne*) and click **"Create"**.

<img src="https://mintcdn.com/arbitrageonegmbh/NZo3nUkop3rLRZd_/articles/erste-schritte/images/prep_business_2.png?fit=max&auto=format&n=NZo3nUkop3rLRZd_&q=85&s=7129ec3867e997dc25be1305fb8c4c01" alt="" width="1946" height="618" data-path="articles/erste-schritte/images/prep_business_2.png" />

**Step 3: Copy and paste the API key**

→ Open directly in the app: [app.arbitrageone.de/apiconnections](https://app.arbitrageone.de/apiconnections)

A pop-up window appears. Click **"Copy To Clipboard"**, then paste the API key into **ArbitrageOne** under **"API Token"**.

<img src="https://mintcdn.com/arbitrageonegmbh/NZo3nUkop3rLRZd_/articles/erste-schritte/images/prep_business_3.png?fit=max&auto=format&n=NZo3nUkop3rLRZd_&q=85&s=db300b0cb4ce27a2a7fd6944315da791" alt="" width="1310" height="882" data-path="articles/erste-schritte/images/prep_business_3.png" />

**Step 4: Copy and paste your Merchant ID**

Go back to the **Prep Center portal** and close the pop-up. Next, copy your **Merchant ID** — you'll find it at the top inside the blue info box (click the copy icon next to the number) — and paste it into **ArbitrageOne**.

<img src="https://mintcdn.com/arbitrageonegmbh/NZo3nUkop3rLRZd_/articles/erste-schritte/images/prep_business_4.png?fit=max&auto=format&n=NZo3nUkop3rLRZd_&q=85&s=59292844e977ab009d1d290ca92316d5" alt="" width="1382" height="436" data-path="articles/erste-schritte/images/prep_business_4.png" />

**Step 5: Add a shipping address**

→ Open directly in the app: [app.arbitrageone.de/shippingaddresses](https://app.arbitrageone.de/shippingaddresses)

After successfully adding the Prep Center API, add or edit a **shipping address** in **ArbitrageOne** under *Settings*. Enable the toggle **"This is a Prep Center"** and select the correct entry under **"Prep Center API"**.

<img src="https://mintcdn.com/arbitrageonegmbh/NZo3nUkop3rLRZd_/articles/erste-schritte/images/prep_business_5.png?fit=max&auto=format&n=NZo3nUkop3rLRZd_&q=85&s=d3d4ddfbd0774458b7a115e577104289" alt="" width="471" height="563" data-path="articles/erste-schritte/images/prep_business_5.png" />