If you have implemented native meta transactions via external contract wallet approach like gnosis or argent, you need to whitelist all Destination contracts where your proxy contracts will relay the transactions.
This guide will help you whitelist destination contracts.
Before using this API, make sure you have generated an access token from the dashboard which is visible in you View DApp section on dashboard.
{"code": 200,"message": "Addresses whitelisted successfully except duplicate addresses or invalid addresses","registeredCount": 0,"duplicateContracts": ["0xf676922ba0564b6925bc9142cxxxxxxxxxxx"],"invalidContracts": ["0xf676922ba0xxxxxxx"]}
{"code": 400,"message": "Enter valid contract address "}
{"code": 401,"message": "Not Authorized"}