diff --git a/smolcgi.py b/smolcgi.py
index 50af8b9..cc1a9ae 100644
--- a/smolcgi.py
+++ b/smolcgi.py
@@ -68,15 +68,23 @@ def header(code, meta):
     print(f"{code} {meta}", end="\r\n")
 
 
+def success(mime):
+    header(20, mime)
+
+
 def exit_with_header(code, meta):
     header(code, meta)
     exit()
 
 
-def require_input(reason):
+def require_input(reason=""):
     exit_with_header(10, reason)
 
 
+def require_sensitive_input(reason=""):
+    exit_with_header(11, reason)
+
+
 def redirect_temp(url):
     exit_with_header(30, url)
 
@@ -85,15 +93,43 @@ def redirect_perm(url):
     exit_with_header(31, url)
 
 
-def temp_error(reason):
+def temp_error(reason=""):
+    exit_with_header(40, reason)
+
+
+def server_unavailable(reason=""):
+    exit_with_header(41, reason)
+
+
+def cgi_error(reason=""):
     exit_with_header(42, reason)
 
 
-def not_found(reason="Not found"):
+def proxy_error(reason=""):
+    exit_with_header(43, reason)
+
+
+def slow_down(num_seconds):
+    exit_with_header(44, num_seconds)
+
+
+def perm_error(reason=""):
+    exit_with_header(50, reason)
+
+
+def not_found(reason=""):
     exit_with_header(51, reason)
 
 
-def bad_request(reason="Bad request"):
+def gone(reason=""):
+    exit_with_header(52, reason)
+
+
+def proxy_request_refused(reason=""):
+    exit_with_header(53, reason)
+
+
+def bad_request(reason=""):
     exit_with_header(59, reason)
 
 
@@ -102,6 +138,14 @@ def require_client_cert():
         exit_with_header(60, "You need a certificate to use this app")
 
 
+def cert_not_authorised(reason=""):
+    exit_with_header(61, reason)
+
+
+def cert_not_valid(reason=""):
+    exit_with_header(62, reason)
+
+
 def print_env():
     globz = globals()
     for key in cgi_vars: