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You need a PayPal Developer account to create a REST API app. Sandbox and Live environments use separate Client IDs and Secrets — ensure you copy the correct credentials for the environment you are connecting.

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Prerequisites

Verify you have the necessary access before starting setup.

  • A PayPal account (Business or Personal) at paypal.com
  • A PayPal Developer account at developer.paypal.com (sign in with your PayPal credentials)
  • Access to the PayPal Developer Dashboard to create and manage REST API apps

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Create a REST API App

Register a new application in the PayPal Developer Dashboard to obtain API credentials.

1

Sign in to the PayPal Developer Dashboard

Sign in to the PayPal Developer Dashboard using your PayPal account credentials.

2

Navigate to Apps & Credentials

In the left sidebar, click Apps & Credentials. Use the toggle at the top to switch between Sandbox and Live environments.

3

Create a new app

Click the Create App button.

  • Enter an App Name (e.g., StackOne Integration).
  • Select Merchant as the App Type.
  • For Sandbox, optionally select a Sandbox Business Account to associate with the app.
  • Click Create App to finish.
4

Copy the Client ID and Secret

After creating the app, the Client ID and Secret are displayed immediately on the app details page. Copy both values now.

  • Copy the Client ID — this is a long alphanumeric string (e.g., AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPp).
  • Click Show next to Secret, then copy the Secret.

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Configure App Features and Permissions

After creating the app, enable the required features to grant API access to the necessary PayPal services.

1

Enable required features

In your app details page, scroll to the Features section. Under Payment capabilities, toggle on the features your integration requires.

  • Save payment methods — use the Vault API to save your customer’s payment methods to speed up checkout
  • Subscriptions — set up recurring payments for customers
  • Invoicing — send and manage customer invoices
  • Payment links and buttons — add payment link, payment button, shopping cart button capabilities
  • Payouts — send payments to multiple PayPal accounts at once

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Select the Matching Environment in StackOne

When connecting in StackOne, select the environment that matches the credentials you copied.

  • Sandbox — select if you copied Sandbox credentials
  • Live — select Production if you copied Live credentials
  • Using mismatched credentials and environment will cause authentication failures

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Creating the StackOne Connector Profile

To create the Connector Profile in StackOne for PayPal:
1

Navigate to Connector Profiles

Login to StackOne and navigate to Connector Profiles
2

Create New Connector Profile

  • Click + Connector Profile
  • Search for and select PayPal
  • Select Type as OAuth 2.0 (Client Credentials)
  • Fill out the fields using details retrieved from your provider:
    • Client ID
    • Secret
  • (Optional) Select Actions to be enabled for this Connector Profile
  • Click Create profile
Congratulations! The new Connector Profile will now show up in your project ready to be used. You can now continue to Link Accounts for PayPal.