diff --git a/enclaves/quartz/src/main.rs b/enclaves/quartz/src/main.rs
index 649fe71..7b27c3d 100644
--- a/enclaves/quartz/src/main.rs
+++ b/enclaves/quartz/src/main.rs
@@ -15,6 +15,7 @@
 
 mod attestor;
 mod cli;
+mod mtcs_server;
 mod proto;
 mod server;
 
@@ -31,6 +32,8 @@ use tonic::transport::Server;
 use crate::{
     attestor::{Attestor, EpidAttestor},
     cli::Cli,
+    mtcs_server::MtcsService,
+    proto::clearing_server::ClearingServer as MtcsServer,
     server::CoreService,
 };
 
@@ -67,6 +70,7 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
             sk.clone(),
             EpidAttestor,
         )))
+        .add_service(MtcsServer::new(MtcsService::new(sk.clone(), EpidAttestor)))
         .serve(args.rpc_addr)
         .await?;
 
diff --git a/enclaves/quartz/src/mtcs_server.rs b/enclaves/quartz/src/mtcs_server.rs
new file mode 100644
index 0000000..7216b3e
--- /dev/null
+++ b/enclaves/quartz/src/mtcs_server.rs
@@ -0,0 +1,37 @@
+use std::sync::{Arc, Mutex};
+
+use k256::ecdsa::SigningKey;
+use tonic::{Request, Response, Result as TonicResult, Status};
+
+use crate::{
+    attestor::Attestor,
+    proto::{clearing_server::Clearing, RunClearingRequest, RunClearingResponse},
+};
+
+#[derive(Clone, Debug)]
+pub struct MtcsService<A> {
+    sk: Arc<Mutex<Option<SigningKey>>>,
+    attestor: A,
+}
+
+impl<A> MtcsService<A>
+where
+    A: Attestor,
+{
+    pub fn new(sk: Arc<Mutex<Option<SigningKey>>>, attestor: A) -> Self {
+        Self { sk, attestor }
+    }
+}
+
+#[tonic::async_trait]
+impl<A> Clearing for MtcsService<A>
+where
+    A: Attestor + Send + Sync + 'static,
+{
+    async fn run(
+        &self,
+        _request: Request<RunClearingRequest>,
+    ) -> TonicResult<Response<RunClearingResponse>> {
+        todo!()
+    }
+}