Create PayPal REST API Credentials
- Log in to the PayPal Developer Dashboard
- Click Apps & Credentials in the top menu
- Switch to Live mode (top right toggle)
- Click Create App
- Enter an app name (e.g., "Email Calculator") and click Create App
- Copy your Client ID
- Click Show next to Secret and copy the Secret
💡 Tip: Make sure to use Live credentials, not Sandbox credentials, to track real transactions.
Add PayPal Integration in Email Calculator
- Go to Settings → API Integrations
- Select ROI Platforms from the dropdown
- Choose PayPal
- Paste your Client ID
- Paste your Client Secret
- Select Live mode
- Click Connect Platform
Track UTM Parameters
To attribute PayPal transactions to specific email campaigns, include UTM parameters in your custom field or passthrough data:
{
"utm_source": "email",
"utm_medium": "newsletter",
"utm_campaign": "spring_sale_2026"
}Email Calculator will automatically extract UTM parameters from PayPal custom field data to attribute revenue to campaigns.
What Gets Synced
- Transaction ID and status
- Transaction amount and currency
- Payer email and name
- Transaction date and time
- UTM parameters from custom field data