Hi @roshanyadav
Just for reference: https://github.com/metabase/metabase/blob/master/docs/api-documentation.md#post-apicardcard-idqueryexport-format
Have you tried to make sure you’re sending the exact same parameters, when using the browser? It’s the best way to learn the API.
Also, using CURL might be a simpler way to debug something.
The 401 is something to do with a wrong token used I guess. Have a look at this topic: How to access metabase api using vue js
Not sure what’s going on, when you’re seeing 500, so make sure you’re using 0.35.3 (released yesterday), otherwise you need to enable debug logging:
https://www.metabase.com/docs/latest/operations-guide/log-configuration.html