You can get quick answer of your question by entering here
Why the flight API search response is different in Test API and Live API, like test API Response : Segments Array was inside fareDataMultiple and In Live API Segments Array was outside FareDataMultiple?
Test API response and Live API responses are same, in both condition you will get the Segment array outside the FareDataMultiple in both test API and Live API. Please check if there is multple fare types in flight API search response. We suggest please close all the FareDataMultiple array and check. If you still facing an issue please share the API request and response logs at support@srdvtechnologies.com.