diff --git a/api/source_specs.go b/api/source_specs.go
index 85a5413..6e0fa30 100644
--- a/api/source_specs.go
+++ b/api/source_specs.go
@@ -21,6 +21,9 @@ type field struct {
 	Placeholder string   `json:"placeholder,omitempty"`
 	Default     string   `json:"default,omitempty"`
 	Choices     []string `json:"choices,omitempty"`
+	Required    bool     `json:"required,omitempty"`
+	Secret      bool     `json:"secret,omitempty"`
+	Description string   `json:"description,omitempty"`
 }
 
 func getSourceSpecs(_ *config.Options, p httprouter.Params, body io.Reader) Response {
@@ -66,11 +69,20 @@ func getSourceSpec(_ *config.Options, p httprouter.Params, body io.Reader) Respo
 					f.Placeholder = kv[1]
 				case "default":
 					f.Default = kv[1]
+				case "description":
+					f.Description = kv[1]
 				case "choices":
 					f.Choices = strings.Split(kv[1], ";")
 				}
 			} else {
-				f.Label = kv[0]
+				switch strings.ToLower(kv[0]) {
+				case "required":
+					f.Required = true
+				case "secret":
+					f.Secret = true
+				default:
+					f.Label = kv[0]
+				}
 			}
 		}
 		fields = append(fields, f)
diff --git a/sources/ddns/source.go b/sources/ddns/source.go
index 991c537..21beadf 100644
--- a/sources/ddns/source.go
+++ b/sources/ddns/source.go
@@ -13,9 +13,9 @@ import (
 
 type DDNSServer struct {
 	Server  string `json:"server,omitempty" happydns:"label=Server,placeholder=127.0.0.1"`
-	KeyName string `json:"keyname,omitempty" happydns:"label=Key Name,placeholder=ddns."`
-	KeyAlgo string `json:"algorithm,omitempty" happydns:"label=Key Algorithm,default=hmac-sha256.,choices=hmac-md5.sig-alg.reg.int.;hmac-sha1.;hmac-sha224.;hmac-sha256.;hmac-sha384.;hmac-sha512."`
-	KeyBlob []byte `json:"keyblob,omitempty" happydns:"label=Secret Key,placeholder=a0b1c2d3e4f5=="`
+	KeyName string `json:"keyname,omitempty" happydns:"label=Key Name,placeholder=ddns.,required"`
+	KeyAlgo string `json:"algorithm,omitempty" happydns:"label=Key Algorithm,default=hmac-sha256.,choices=hmac-md5.sig-alg.reg.int.;hmac-sha1.;hmac-sha224.;hmac-sha256.;hmac-sha384.;hmac-sha512.,required"`
+	KeyBlob []byte `json:"keyblob,omitempty" happydns:"label=Secret Key,placeholder=a0b1c2d3e4f5==,required,secret"`
 }
 
 func (s *DDNSServer) base64KeyBlob() string {