diff --git a/src/api/rules.rs b/src/api/rules.rs
index 860987d..e873772 100644
--- a/src/api/rules.rs
+++ b/src/api/rules.rs
@@ -148,6 +148,64 @@ pub struct Rule {
     pub conditions: RuleCondition
 }
 
+impl Rule {
+    pub fn new(ruleset: String, folder: String) -> Self {
+        Self {
+            ruleset,
+            folder,
+            ..Default::default()
+        }
+    }
+
+    pub fn set_ruleset(&mut self, ruleset: String) {
+        self.ruleset = ruleset;
+    }
+    pub fn with_ruleset(mut self, ruleset: String) -> Self {
+        self.set_ruleset(ruleset);
+        self
+    }
+
+    pub fn set_folder(&mut self, folder: String) {
+        self.folder = folder;
+    }
+    pub fn with_folder(mut self, folder: String) -> Self {
+        self.set_folder(folder);
+        self
+    }
+
+    pub fn set_folder_index(&mut self, index: usize) {
+        self.folder_index = index;
+    }
+    pub fn with_folder_index(mut self, index: usize) -> Self {
+        self.set_folder_index(index);
+        self
+    }
+
+    pub fn set_properties(&mut self, properties: RuleProperties) {
+        self.properties = properties;
+    }
+    pub fn with_properties(mut self, properties: RuleProperties) -> Self {
+        self.set_properties(properties);
+        self
+    }
+
+    pub fn set_value_raw(&mut self, value_raw: String) {
+        self.value_raw = value_raw;
+    }
+    pub fn with_value_raw(mut self, value_raw: String) -> Self {
+        self.set_value_raw(value_raw);
+        self
+    }
+
+    pub fn set_conditions(&mut self, conditions: RuleCondition) {
+        self.conditions = conditions;
+    }
+    pub fn with_conditions(mut self, conditions: RuleCondition) -> Self {
+        self.set_conditions(conditions);
+        self
+    }
+}
+
 #[derive(Debug, Clone, Default, Serialize, Deserialize)]
 #[cfg_attr(feature = "schemars", derive(JsonSchema))]
 pub struct RuleProperties {
@@ -157,6 +215,47 @@ pub struct RuleProperties {
     pub disabled: bool
 }
 
+impl RuleProperties {
+    pub fn new(description: String) -> Self {
+        Self {
+            description,
+            ..Default::default()
+        }
+    }
+
+    pub fn set_description(&mut self, description: String) {
+        self.description = description;
+    }
+    pub fn with_description(mut self, description: String) -> Self {
+        self.set_description(description);
+        self
+    }
+
+    pub fn set_comment(&mut self, comment: String) {
+        self.comment = comment;
+    }
+    pub fn with_comment(mut self, comment: String) -> Self {
+        self.set_comment(comment);
+        self
+    }
+
+    pub fn set_documentation_url(&mut self, url: String) {
+        self.documentation_url = url;
+    }
+    pub fn with_documentation_url(mut self, url: String) -> Self {
+        self.set_documentation_url(url);
+        self
+    }
+
+    pub fn set_disabled(&mut self, disabled: bool) {
+        self.disabled = disabled;
+    }
+    pub fn with_disabled(mut self, disabled: bool) -> Self {
+        self.set_disabled(disabled);
+        self
+    }
+}
+
 // TODO: implement
 pub trait RuleMatch {
     fn matches(&self, other: Self) -> bool;
@@ -165,11 +264,149 @@ pub trait RuleMatch {
 #[derive(Debug, Clone, Default, Serialize, Deserialize)]
 #[cfg_attr(feature = "schemars", derive(JsonSchema))]
 pub struct RuleCondition {
-    pub host_name: MatchCondition,
+    pub host_name: Option<MatchCondition>,
     pub host_tags: Vec<HostTagCondition>,
     pub host_label_groups: Vec<LabelGroupCondition>,
     pub service_label_groups: Vec<LabelGroupCondition>,
-    pub service_description: MatchCondition
+    pub service_description: Option<MatchCondition>,
+}
+
+impl RuleCondition {
+    /// Match hosts whose name is one of the given values.
+    pub fn match_hosts(&mut self, hosts: Vec<String>) {
+        self.host_name = Some(MatchCondition { match_on: hosts, operator: MatchOperator::OneOf });
+    }
+    pub fn matching_hosts(mut self, hosts: Vec<String>) -> Self {
+        self.match_hosts(hosts);
+        self
+    }
+
+    /// Exclude hosts whose name is one of the given values.
+    pub fn exclude_hosts(&mut self, hosts: Vec<String>) {
+        self.host_name = Some(MatchCondition { match_on: hosts, operator: MatchOperator::NoneOf });
+    }
+    pub fn excluding_hosts(mut self, hosts: Vec<String>) -> Self {
+        self.exclude_hosts(hosts);
+        self
+    }
+
+    /// Clear any host name condition.
+    pub fn clear_hosts(&mut self) {
+        self.host_name = None;
+    }
+
+    /// Match services whose description is one of the given values.
+    pub fn match_services(&mut self, services: Vec<String>) {
+        self.service_description = Some(MatchCondition { match_on: services, operator: MatchOperator::OneOf });
+    }
+    pub fn matching_services(mut self, services: Vec<String>) -> Self {
+        self.match_services(services);
+        self
+    }
+
+    /// Exclude services whose description is one of the given values.
+    pub fn exclude_services(&mut self, services: Vec<String>) {
+        self.service_description = Some(MatchCondition { match_on: services, operator: MatchOperator::NoneOf });
+    }
+    pub fn excluding_services(mut self, services: Vec<String>) -> Self {
+        self.exclude_services(services);
+        self
+    }
+
+    /// Clear any service description condition.
+    pub fn clear_services(&mut self) {
+        self.service_description = None;
+    }
+
+    /// Require the host tag `key` to equal `value`.
+    pub fn require_host_tag(&mut self, key: String, value: String) {
+        self.host_tags.push(HostTagCondition { key, match_on: TagMatchOperator::Is(value) });
+    }
+    pub fn with_host_tag(mut self, key: String, value: String) -> Self {
+        self.require_host_tag(key, value);
+        self
+    }
+
+    /// Require the host tag `key` to not equal `value`.
+    pub fn exclude_host_tag(&mut self, key: String, value: String) {
+        self.host_tags.push(HostTagCondition { key, match_on: TagMatchOperator::IsNot(value) });
+    }
+    pub fn without_host_tag(mut self, key: String, value: String) -> Self {
+        self.exclude_host_tag(key, value);
+        self
+    }
+
+    /// Require the host tag `key` to be one of `values`.
+    pub fn require_any_host_tag(&mut self, key: String, values: Vec<String>) {
+        self.host_tags.push(HostTagCondition { key, match_on: TagMatchOperator::OneOff(values) });
+    }
+    pub fn with_any_host_tag(mut self, key: String, values: Vec<String>) -> Self {
+        self.require_any_host_tag(key, values);
+        self
+    }
+
+    /// Require the host tag `key` to be none of `values`.
+    pub fn exclude_any_host_tag(&mut self, key: String, values: Vec<String>) {
+        self.host_tags.push(HostTagCondition { key, match_on: TagMatchOperator::NoneOff(values) });
+    }
+    pub fn without_any_host_tag(mut self, key: String, values: Vec<String>) -> Self {
+        self.exclude_any_host_tag(key, values);
+        self
+    }
+
+    /// Add a host label group that must ALL match (AND).
+    pub fn require_host_labels(&mut self, labels: Vec<LabelCondition>) {
+        self.host_label_groups.push(LabelGroupCondition { operator: LabelOperator::And, label_group: labels });
+    }
+    pub fn with_host_labels(mut self, labels: Vec<LabelCondition>) -> Self {
+        self.require_host_labels(labels);
+        self
+    }
+
+    /// Add a host label group where ANY must match (OR).
+    pub fn require_any_host_label(&mut self, labels: Vec<LabelCondition>) {
+        self.host_label_groups.push(LabelGroupCondition { operator: LabelOperator::Or, label_group: labels });
+    }
+    pub fn with_any_host_label(mut self, labels: Vec<LabelCondition>) -> Self {
+        self.require_any_host_label(labels);
+        self
+    }
+
+    /// Add a host label group that must NOT match (NOT).
+    pub fn exclude_host_labels(&mut self, labels: Vec<LabelCondition>) {
+        self.host_label_groups.push(LabelGroupCondition { operator: LabelOperator::Not, label_group: labels });
+    }
+    pub fn excluding_host_labels(mut self, labels: Vec<LabelCondition>) -> Self {
+        self.exclude_host_labels(labels);
+        self
+    }
+
+    /// Add a service label group that must ALL match (AND).
+    pub fn require_service_labels(&mut self, labels: Vec<LabelCondition>) {
+        self.service_label_groups.push(LabelGroupCondition { operator: LabelOperator::And, label_group: labels });
+    }
+    pub fn with_service_labels(mut self, labels: Vec<LabelCondition>) -> Self {
+        self.require_service_labels(labels);
+        self
+    }
+
+    /// Add a service label group where ANY must match (OR).
+    pub fn require_any_service_label(&mut self, labels: Vec<LabelCondition>) {
+        self.service_label_groups.push(LabelGroupCondition { operator: LabelOperator::Or, label_group: labels });
+    }
+    pub fn with_any_service_label(mut self, labels: Vec<LabelCondition>) -> Self {
+        self.require_any_service_label(labels);
+        self
+    }
+
+    /// Add a service label group that must NOT match (NOT).
+    pub fn exclude_service_labels(&mut self, labels: Vec<LabelCondition>) {
+        self.service_label_groups.push(LabelGroupCondition { operator: LabelOperator::Not, label_group: labels });
+    }
+    pub fn excluding_service_labels(mut self, labels: Vec<LabelCondition>) -> Self {
+        self.exclude_service_labels(labels);
+        self
+    }
 }
 
 #[derive(Debug, Clone, Default, Serialize, Deserialize)]
@@ -316,6 +553,7 @@ mod serde_tags {
             let mut tvalue: Option<ValueKind> = None;
 
             while let Some(key) = map.next_key()? {
+                #[allow(unused_must_use)]
                 match key {
                     Field::Key => {tkey.insert(map.next_value()?);},
                     Field::Operator => {toperator.insert(map.next_value()?);},