A simple bulk refund tool for the PayPal REST API. Use at your own risk.
npm install -g paypal-bulk-refund
PAYPAL_CLIENT_ID=xxx PAYPAL_CLIENT_SECRET=yyy PAYPAL_MODE=live paypal-bulk-refund my-transaction-ids.txt
PAYPAL_MODE defaults to live. You can also set it to sandbox.
See the PayPal documentation for more information about obtaining a client ID and secret for use with the REST API.
my-transaction-ids.txt can be any file containing one PayPal transaction ID per line, and nothing else.
If errors occur for some transactions the tool will continue, and print a summary at the end.
To obtain transaction IDs in bulk, use the export feature of the PayPal website.
Hope you find it helpful!