API Credentials for eBay

To call eBay's API you need an “application keyset,” made up of three identifiers: App ID (Client ID), Dev ID (Developer ID) and Cert ID (Client Secret). Below you will find step‑by‑step instructions to obtain each one from the eBay Developer Portal.

App ID (Client ID)

1. 1

   Go to https://developer.ebay.com and sign in with your eBay account, or create one if you are not yet enrolled in the developer program.

2. 2

   In the upper‑right corner, click your name and choose “Application Keys.”

3. 3

   If you do not have keys yet, click “Create a keyset.” First choose **Sandbox** (testing) or **Production** (live) and confirm your contact information.

4. 4

   After the keyset is created you will see a box with three values: copy the text labeled **App ID** or **Client ID**.

Dev ID (Developer ID)

1. 1

   Repeat steps 1 and 2 above to reach the “Application Keys” page.

2. 2

   Just above (or next to) your keyset box you will see the **Dev ID** field. This identifier is unique to your developer account and is the same for Sandbox and Production. Copy and save it.

3. 3

   If you ever create another application, your Dev ID will not change as long as you use the same developer account.

Cert ID (Client Secret)

1. 1

   In the same keyset box (where you found the App ID) locate the **Cert ID** or **Client Secret** value.

2. 2

   Click the copy icon (or highlight the text) and store this value in a safe place; it is your application “password” and **should not be shared publicly**.

3. 3

   If you create a second keyset (for example, one in Sandbox and another in Production), each keyset will have its own Cert ID. Make sure to use the one that matches the environment you are calling.

4. 4

   If your Cert ID is ever compromised, you can regenerate it using the "Reset" button next to the key on the same screen.