Example request
curl -X POST https://your-apigee-domain/mtlsproxy \
-F "pfxFile=$(cat path/to/your/client.pfx | base64)" \
-F "pfxPassword=yourpassword" \
-F "targetUrl=https://target-mtls-server.com" \
-F "targetPath=/endpoint" \
-F "targetMethod=POST" \
-F "tlsVersion=TLSv1_3_method"