Use the below credentials for Pre-Prod testing:
Host: <https://mercury-uat.phonepe.com>
<code>merchantID</code>: Kindly request the MID if you haven't received from the PhonePe Integration team.
Keys: Will be shared along with the MID details. If not received, kindly request from the PhonePe Integration team.
UAT Testing
Share the PreProd build with the PhonePe team for sanity and UAT sign-off before moving to Production. Generally, UAT takes 1 - 2 working days.