diff --git a/cruciverb-server/src/activitypub/mod.rs b/cruciverb-server/src/activitypub/mod.rs
new file mode 100644
index 0000000..4227cf0
--- /dev/null
+++ b/cruciverb-server/src/activitypub/mod.rs
@@ -0,0 +1,35 @@
+pub mod actor;
+pub mod deliver;
+pub mod discover;
+pub mod inbox;
+pub mod keys;
+pub mod nodeinfo;
+pub mod outbox;
+pub mod signatures;
+pub mod types;
+
+use std::sync::atomic::{AtomicBool, Ordering};
+
+static FEDERATION_FROZEN: AtomicBool = AtomicBool::new(false);
+
+pub fn is_frozen() -> bool {
+    FEDERATION_FROZEN.load(Ordering::Acquire)
+}
+
+pub fn set_frozen(frozen: bool) {
+    FEDERATION_FROZEN.store(frozen, Ordering::Release);
+}
+
+pub struct ApState {
+    pub domain: String,
+    pub actor_name: String,
+    pub actor_uri: String,
+    pub keys: keys::ApKeys,
+}
+
+impl ApState {
+    pub fn new(domain: String, actor_name: String, keys: keys::ApKeys) -> Self {
+        let actor_uri = format!("https://{}/@{}", domain, actor_name);
+        Self { domain, actor_name, actor_uri, keys }
+    }
+}