diff --git a/conf/phpki_certs.conf b/conf/phpki_certs.conf
new file mode 100644
index 0000000..e5d7f54
--- /dev/null
+++ b/conf/phpki_certs.conf
@@ -0,0 +1,13 @@
+# Discovery of certificates and their status
+# Key: pki.certs.discovery
+# Macro: 
+# - {#CRTCN} : contains the common name
+# - {#CRTSERIAL} : the serial number
+# - {#CRTSTATUS} : the status, as a string (valid, revoked, expired)
+# Available arguments:
+# --index : path to the index file
+# --path : directory where certificatres are stored, certificates should be named $serial.pem (in PEM format)
+
+UserParameter=pki.certs.discovery,/usr/bin/sudo /var/lib/zabbix/bin/disco_certs_sudo --index=/opt/phpki/phpki-store/CA/index.txt --path=/opt/phpki/phpki-store/CA/newcerts/
+UserParameter=pki.certs[*],/usr/bin/sudo /var/lib/zabbix/bin/check_certs_sudo --what=$1 --cert=$2
+
diff --git a/zabbix_scripts/check_certs_sudo b/zabbix_scripts/check_certs_sudo
new file mode 100644
index 0000000..5ae3641
--- /dev/null
+++ b/zabbix_scripts/check_certs_sudo
@@ -0,0 +1,33 @@
+#!/usr/bin/perl -w
+
+# Check a PEM certificate
+# --what: what to monitor. Only expire is supported for now, and returns the number of day before expiration
+# --cert: the path to the certificate you want to check
+
+use strict;
+use warnings;
+use Crypt::OpenSSL::X509;
+use Date::Parse;
+use Getopt::Long;
+
+my $what = 'expire';
+my $cert = '';
+
+GetOptions(
+    "cert=s" => \$cert,
+    "what=s"  => \$what
+);
+
+die "Usage: $0 --what=status --cert=/path/to/pem/certificate\n" unless
+    (-f $cert);
+
+$cert = Crypt::OpenSSL::X509->new_from_file( "$cert" );
+my $expire_in = int ((str2time($cert->notAfter())-time())/(3600*24));
+
+if ($what eq 'expire'){
+    print $expire_in;
+}
+else{
+    die "Only expire is supported for now";
+}
+
diff --git a/zabbix_scripts/disco_certs_sudo b/zabbix_scripts/disco_certs_sudo
new file mode 100644
index 0000000..88c1ecf
--- /dev/null
+++ b/zabbix_scripts/disco_certs_sudo
@@ -0,0 +1,49 @@
+#!/usr/bin/perl -w
+
+use strict;
+use warnings;
+use Crypt::OpenSSL::X509;
+use Date::Parse;
+use Getopt::Long;
+use JSON;
+
+my $index = '/opt/phpki/phpki-store/CA/index.txt';
+my $path = '/opt/phpki/phpki-store/CA/newcerts';
+
+GetOptions(
+    "index=s" => \$index,
+    "path=s"  => \$path
+);
+
+open INDEX, "$index" or die "Couldn't open $index\n";
+
+my $json;
+
+foreach my $l (<INDEX>){
+    next unless $l =~ m/^([VR])\t\d+Z\t(\d+Z)?\t(\w+)\tunknown\t.*/;
+    my $status = $1;
+    my $serial = $3;
+    my $cert = Crypt::OpenSSL::X509->new_from_file( "$path/$serial.pem" );
+
+    my $expire_in = int ((str2time($cert->notAfter())-time())/(3600*24));
+    if ($status eq 'V'){
+        $status = 'valid';
+    }
+    elsif ($expire_in lt 0){
+        $status = 'expired';
+    }
+    else{
+        $status = 'revoked';
+    }
+    my $subject = $cert->subject;
+    $subject =~ m/.*\sCN=(.*),/;
+    my $cn = $1;
+
+    push @{$json->{data}}, {
+          "{#CRTCN}" => $cn,
+          "{#CRTSERIAL}" => $serial,
+          "{#CRTSTATUS}" => $status,
+    };
+}
+close INDEX;
+print to_json($json);