HTTPS test server that checks client certificates

Question

I have written a web service client that uses SSL client certificates to authenticate to the remote server. But since the actual web service is not yet available to me, I\'m

Answer 1

https://client.badssl.com (part of the badssl.com service) lets you test authentication using client SSL certificates. The client certificate can be downloaded from https://badssl.com/download/.

This server returns 200 OK if the correct client certificate is provided, and 400 Bad Request otherwise.