You can look up any transaction by placing a transaction token in the query bar, then click the "Look Up" feature at the top of the Transactions screen on your Dashboard:
When viewing a specific transaction, at the bottom of the screen, you can tab between the transcript (communication between Spreedly and a payment gateway - not available for Spreedly-only transactions such as adding/redacting payment methods) and the JSON response body (Spreedly's response back to you after a transaction is completed).
Check out our guide on troubleshooting for more helpful information on examining your transactions. Or contact Customer Support if you need technical support.