How to Generate your Omnisend API Key

Generate or locate your Omnisend API key in the Omnisend dashboard — required to authenticate the Upstack Data Omnisend destination and forward server-side events.

Quick Summary

• Sign in to Omnisend

• Open Store settings → API

• Click + Create API key, name it UpstackData, then click Create API key

• Copy the generated API key and store it securely (Omnisend only shows it once)

• Paste the API key into the Omnisend destination form in your Upstack dashboard

What is an Omnisend API key? An Omnisend API key is a unique credential generated in your Omnisend account that allows Upstack Data to securely access and interact with your Omnisend data. It is a long alphanumeric string, typically structured as a 64-character secret followed by a - and a short identifier (for example, xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx-xxxxxxxxxx).

Prerequisites

Before you start, you need:

• Admin access to your Omnisend account

• Permission to create API keys in Omnisend

• A secure place to store the generated API key (Omnisend only displays it once)

Steps to Generate the API Key

1. Sign in to Omnisend

   Sign in to Omnisend to open your dashboard.

   In the left-hand menu, click Store settings, then go to the API tab.

   
2. Create a new API key

   On the API settings page, click the + Create API key button.

   

   Enter UpstackData as the API key name, then click Create API key.

   
3. Copy and save your API key

   Click the Copy API key button to copy the generated API key, then store it securely (for example, in a password manager).

   Paste the API key into the API key field when configuring the Omnisend destination in your Upstack dashboard.

   This API key is only shown once — copy it immediately. The API key is sensitive: anyone with it can read and write data in your Omnisend account, so store it in a secure location and never share it.

   
4. Verify the API key format

   Confirm the value you copied is a long alphanumeric string with no extra spaces — typically a 64-character secret followed by a - and a short identifier. You can paste it into the API key field when configuring the Omnisend destination in your Upstack dashboard.

Here’s a help guide on

How to Configure Omnisend Pixel Destination in Upstack Data →