How to contact OCSP Server Manually to get information on validity of any certificate?

I want to enable OCSP Stapling in my site. The part where I am stuck is, that generally in OCSP, the client, ie generally the browsers query the OCSP Server with the certificate presented by the server (site), but here, I want to enable OCSP Stapling, ie the server will itself staple the response given by OCSP Server and pass it to the client over TLS Handhshake. But there seems no way to do it. So I want to know how clients like browsers do it.