Convert BUSD to BNB API Endpoint

Hello,
I have a futures account and in this account I have BUSD, which I use for positions, and BNB for the fees. When BNB is near to zero I convert some of the BUSD to BNB. I am using the APIs for all the transactions and this is the only manual one. Is there an API that can do this?
Thanks

https://binance-docs.github.io/apidocs/spot/en/#get-assets-that-can-be-converted-into-bnb-user_data
this endpoint can be used to convert small amount of asset to BNB.

https://binance-docs.github.io/apidocs/spot/en/#send-quote-request-user_data
Or you can use this endpoint to convert BUSD to BNB

or you can also buy bnb by busd from spot market.

Hi Dino,
Thank you for your reply. I tried the second API and I got an error. Specifically I am using the postman collection, I have setup the SPOT environment, and I ran the endpoint you suggested. I am getting an error that the API Key format is invalid(Check screenshot). If I select any other endpoint with USER_DATA the API key is working. Any ideas?

Thanks!