diff --git a/cluster-endpoints/src/grpc_subscription.rs b/cluster-endpoints/src/grpc_subscription.rs
index 5fd6d46e..49bd0949 100644
--- a/cluster-endpoints/src/grpc_subscription.rs
+++ b/cluster-endpoints/src/grpc_subscription.rs
@@ -249,6 +249,7 @@ fn process_block(
 
 pub fn create_block_processing_task(
     grpc_addr: String,
+    grpc_x_token: Option<String>,
     block_sx: Sender<ProducedBlock>,
     commitment_level: CommitmentLevel,
 ) -> AnyhowJoinHandle {
@@ -271,7 +272,7 @@ pub fn create_block_processing_task(
 
     tokio::spawn(async move {
         // connect to grpc
-        let mut client = GeyserGrpcClient::connect(grpc_addr, None::<&'static str>, None)?;
+        let mut client = GeyserGrpcClient::connect(grpc_addr, grpc_x_token, None)?;
         let mut stream = client
             .subscribe_once(
                 HashMap::new(),
@@ -314,6 +315,7 @@ pub fn create_block_processing_task(
 pub fn create_grpc_subscription(
     rpc_client: Arc<RpcClient>,
     grpc_addr: String,
+    grpc_x_token: Option<String>,
     expected_grpc_version: String,
 ) -> anyhow::Result<(EndpointStreaming, Vec<AnyhowJoinHandle>)> {
     let (slot_sx, slot_notifier) = tokio::sync::broadcast::channel(10);
@@ -324,10 +326,11 @@ pub fn create_grpc_subscription(
     let mut slots = HashMap::new();
     slots.insert("client".to_string(), SubscribeRequestFilterSlots {});
 
-    let grpc_addr_cp = grpc_addr.clone();
+    let grpc_addr_cp: String = grpc_addr.clone();
+    let x_token_cp = grpc_x_token.clone();
     let slot_task: AnyhowJoinHandle = tokio::spawn(async move {
         // connect to grpc
-        let mut client = GeyserGrpcClient::connect(grpc_addr_cp, None::<&'static str>, None)?;
+        let mut client = GeyserGrpcClient::connect(grpc_addr_cp, x_token_cp, None)?;
 
         let version = client.get_version().await?.version;
         if version != expected_grpc_version {
@@ -379,11 +382,16 @@ pub fn create_grpc_subscription(
 
     let block_confirmed_task: AnyhowJoinHandle = create_block_processing_task(
         grpc_addr.clone(),
+        grpc_x_token.clone(),
         block_sx.clone(),
         CommitmentLevel::Confirmed,
     );
-    let block_finalized_task: AnyhowJoinHandle =
-        create_block_processing_task(grpc_addr, block_sx, CommitmentLevel::Finalized);
+    let block_finalized_task: AnyhowJoinHandle = create_block_processing_task(
+        grpc_addr,
+        grpc_x_token,
+        block_sx,
+        CommitmentLevel::Finalized,
+    );
 
     let cluster_info_polling =
         poll_vote_accounts_and_cluster_info(rpc_client, cluster_info_sx, va_sx);
diff --git a/cluster-endpoints/src/rpc_polling/poll_slots.rs b/cluster-endpoints/src/rpc_polling/poll_slots.rs
index fd363f4f..fe97622d 100644
--- a/cluster-endpoints/src/rpc_polling/poll_slots.rs
+++ b/cluster-endpoints/src/rpc_polling/poll_slots.rs
@@ -1,4 +1,7 @@
-use std::{sync::Arc, time::Duration};
+use std::{
+    sync::Arc,
+    time::{self, Duration},
+};
 
 use anyhow::{bail, Context};
 use solana_client::nonblocking::rpc_client::RpcClient;
diff --git a/lite-rpc/src/cli.rs b/lite-rpc/src/cli.rs
index 78d2659a..9e9cfdae 100644
--- a/lite-rpc/src/cli.rs
+++ b/lite-rpc/src/cli.rs
@@ -37,4 +37,6 @@ pub struct Args {
     /// grpc address
     #[arg(long, default_value_t = String::from(DEFAULT_GRPC_ADDR))]
     pub grpc_addr: String,
+    #[arg(long)]
+    pub grpc_x_token: Option<String>,
 }
diff --git a/lite-rpc/src/main.rs b/lite-rpc/src/main.rs
index b968068f..97b43c15 100644
--- a/lite-rpc/src/main.rs
+++ b/lite-rpc/src/main.rs
@@ -46,6 +46,7 @@ use std::env;
 use std::net::{SocketAddr, ToSocketAddrs};
 use std::sync::Arc;
 use tokio::sync::mpsc;
+use tokio::time::sleep;
 
 use crate::rpc_tester::RpcTester;
 
@@ -95,6 +96,7 @@ pub async fn start_lite_rpc(args: Args, rpc_client: Arc<RpcClient>) -> anyhow::R
         quic_proxy_addr,
         use_grpc,
         grpc_addr,
+        grpc_x_token,
         ..
     } = args;
 
@@ -109,7 +111,12 @@ pub async fn start_lite_rpc(args: Args, rpc_client: Arc<RpcClient>) -> anyhow::R
     let tpu_connection_path = configure_tpu_connection_path(quic_proxy_addr);
 
     let (subscriptions, cluster_endpoint_tasks) = if use_grpc {
-        create_grpc_subscription(rpc_client.clone(), grpc_addr, GRPC_VERSION.to_string())?
+        create_grpc_subscription(
+            rpc_client.clone(),
+            grpc_addr,
+            grpc_x_token,
+            GRPC_VERSION.to_string(),
+        )?
     } else {
         create_json_rpc_polling_subscription(rpc_client.clone())?
     };