A couple of years ago I created a script to the response of a OCSP provider using the openssl ocsp

openssl ocsp -issuer /PATH/issuer.crt -serial 32464515085749554265854291628418826339 -url http://oscp.provider.com -noverify

It worked fine until it started to report

Error querying OCSP responder

and I do not know why.

Is there any way to debug this command and find the root cause of the problem?

I read OCSP is actually a HTTP connection. Do you know any details to run a OCSP query using the either curl or wget tools?

Best regards