> ## Documentation Index > Fetch the complete documentation index at: https://docs.roomdoo.com/llms.txt > Use this file to discover all available pages before exploring further. # Redsys setup > Gather the Redsys payment gateway connection details for Roomdoo: portal access, merchant details and the SHA-256 signature key. # Steps to gather the Redsys payment gateway connection details To set up the payment gateway correctly, we need these four pieces of data: * Merchant number * Terminal * Merchant name * SHA-256 signature key Here's how to find them on the Redsys portal. ## 1. Open the portal Open the Redsys portal and sign in with your username and password for the live environment. ## 2. Find the merchant details Once inside the portal: 1. In the left side menu, choose the **"Administration"** module.
Administration module in the Redsys portal side menu
2. Inside that module, click on **"Merchant configuration"**.
Merchant configuration section
In that section you'll see: 1. Merchant number 2. Terminal 3. Merchant name
Merchant management screen with Merchant number, Terminal and Name
**Important:**\ For these three pieces of data, we need a **full screenshot** where they're clearly visible. ## 3. Get the SHA-256 signature key To get the signature key: 1. Still in the same section, click **"View signature key"**.
View signature key button
2. The system asks for your Redsys portal password again.
Check User Key window asking for the password
3. Enter the password to display the key.
Key Display window with the SHA-256 key
**Very important:** * In this case, **no screenshot is needed**. * You should **copy the SHA-256 signature key** and paste it directly into the email you send us along with the rest of the data.
Copy the SHA-256 signature key from the key display window
## Sending the information Once you've gathered: * Screenshot with Merchant number, Terminal, and Merchant name. * SHA-256 signature key copied as text. Send everything to us by email so we can complete the setup.