diff --git a/.env-template b/.env-template
index 508cf09..20ed6e8 100644
--- a/.env-template
+++ b/.env-template
@@ -1,2 +1,4 @@
+ACCOUNT_SK=""
 PRIVITE_NET_KEY=""
 PRIVITE_NET_ADDRESS="/ip4/0.0.0.0/tcp/8002"
+USE_TESTNET_QUERY=true
diff --git a/Cargo.toml b/Cargo.toml
index 3aed800..ed298b1 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,10 +6,11 @@ edition = "2021"
 [dependencies]
 alloy = "0.9"
 base64 = "0.22"
-dotenv = "0.15.0"
-either = "1.13.0"
-futures-util = "0.3.31"
-hex = "0.4.3"
+cached = "0.54"
+dotenv = "0.15"
+either = "1.13"
+futures-util = "0.3"
+hex = "0.4"
 libp2p = { version = "0.55", features = [
   "dns",
   "tokio",
@@ -25,6 +26,7 @@ libp2p = { version = "0.55", features = [
   "yamux",
   "noise",
 ] }
+once_cell = "1.20"
 reqwest = { version = "0.12", features = ["json"] }
 serde_json = "1"
 tokio = { version = "1", features = ["full"] }
diff --git a/src/mod_libp2p/network.rs b/src/mod_libp2p/network.rs
index 2981e8e..c6b7a9f 100644
--- a/src/mod_libp2p/network.rs
+++ b/src/mod_libp2p/network.rs
@@ -1,6 +1,7 @@
 use crate::mod_libp2p::behavior::{AgentBehavior, AgentEvent};
 use alloy::primitives::{keccak256, Address};
 use base64::{engine::general_purpose::STANDARD, Engine};
+use cached::{stores::SizedCache, Cached};
 use either::Either;
 use futures_util::StreamExt;
 use libp2p::{
@@ -21,14 +22,26 @@ use libp2p::{
     swarm::SwarmEvent,
     tcp, yamux, PeerId, StreamProtocol, Swarm, Transport,
 };
+use once_cell::sync::Lazy;
 use serde_json::{json, Value};
 use std::{error::Error, time::Duration};
-use tracing::info;
+use tokio::sync::Mutex;
+use tracing::{error, info};
 
 pub(crate) struct EventLoop {
     swarm: Swarm<AgentBehavior>,
 }
 
+const METRICS_ADDRESS: &str = "0x38285cb9e23ac02b9c6f4a2fff9c6df45c59f1dc";
+
+const QUERY_INDEXER_URL: &str = match option_env!("USE_TESTNET_QUERY") {
+    Some(_value) => "https://api.subquery.network/sq/subquery/base-testnet",
+    None => "https://api.subquery.network/sq/subquery/subquery-mainnet",
+};
+
+static GLOBAL_INDEXER_CACHE: Lazy<Mutex<SizedCache<PeerId, ()>>> =
+    Lazy::new(|| Mutex::new(SizedCache::with_size(2000)));
+
 impl EventLoop {
     pub async fn new() -> Result<Self, Box<dyn Error>> {
         match Self::start_swarm().await {
@@ -65,32 +78,48 @@ impl EventLoop {
     }
 
     async fn handle_identify_event(&mut self, event: IdentifyEvent) {
-        match event {
-            IdentifyEvent::Received {
-                connection_id,
-                peer_id,
-                info:
-                    IdentifyInfo {
-                        public_key,
-                        listen_addrs,
-                        ..
-                    },
-            } => {
+        if let IdentifyEvent::Received {
+            connection_id,
+            peer_id,
+            info:
+                IdentifyInfo {
+                    public_key,
+                    listen_addrs,
+                    ..
+                },
+        } = event
+        {
+            let mut indexer_cache = GLOBAL_INDEXER_CACHE.lock().await;
+            if indexer_cache.cache_get(&peer_id).is_none() {
                 if let Ok(controller_address) =
                     Self::libp2p_publickey_to_eth_address(&public_key).await
                 {
-                    if let Ok(()) = Self::is_controller_valid(&controller_address).await {
+                    if controller_address == METRICS_ADDRESS {
+                        indexer_cache.cache_set(peer_id, ());
+                        drop(indexer_cache);
                         for addr in listen_addrs {
                             self.swarm.behaviour_mut().kad.add_address(&peer_id, addr);
                         }
                     } else {
-                        self.swarm.close_connection(connection_id);
+                        if let Ok(()) = Self::is_controller_valid(&controller_address).await {
+                            indexer_cache.cache_set(peer_id, ());
+                            drop(indexer_cache);
+                            for addr in listen_addrs {
+                                self.swarm.behaviour_mut().kad.add_address(&peer_id, addr);
+                            }
+                        } else {
+                            error!(
+                                "peer_id {:?} not found, controller_address is {:?}",
+                                peer_id, controller_address
+                            );
+                            self.swarm.close_connection(connection_id);
+                        }
                     }
                 } else {
+                    error!("peer_id {:?} not found, controller_address cannot be converted into ethereum address", peer_id);
                     self.swarm.close_connection(connection_id);
                 }
             }
-            _ => {}
         }
     }
 
@@ -203,11 +232,7 @@ impl EventLoop {
             "query": format!("{{\n  indexers(filter: {{controller: {{equalToInsensitive: \"{}\"}}}}) {{\n    nodes {{\n      id\n    }}\n  }}\n}}", controller)
         });
 
-        let response = client
-            .post("https://api.subquery.network/sq/subquery/subquery-mainnet")
-            .json(&query)
-            .send()
-            .await?;
+        let response = client.post(QUERY_INDEXER_URL).json(&query).send().await?;
 
         let body = response.text().await?;