diff --git a/Cargo.toml b/Cargo.toml
index fc503f7e..88256e8c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -73,7 +73,7 @@ secp256k1 = { version = "0.29.1", features = ["global-context"] }
 anyhow = "1.0.97"
 strum = { version = "0.26", features = ["derive"] }
 tempfile = "3.19.1"
-reqwest = { version = "0.12.28", default-features = false, features = ["json"] }
+reqwest = { version = "0.12.28", default-features = false, features = ["json", "rustls-tls"] }
 http-body-util = "0.1"
 
 axum = "0.8.1"
diff --git a/crates/client/src/graphs/mod.rs b/crates/client/src/graphs/mod.rs
index 27a36ea6..6e48b973 100644
--- a/crates/client/src/graphs/mod.rs
+++ b/crates/client/src/graphs/mod.rs
@@ -1,4 +1,9 @@
 use crate::graphs::graph_query::get_meta_data_query;
+use std::time::Duration;
+use tokio::time::sleep;
+
+const GRAPH_QUERY_RETRY_MAX_ATTEMPTS: usize = 3;
+const GRAPH_QUERY_RETRY_BASE_DELAY_MS: u64 = 250;
 
 pub mod graph_query;
 #[derive(Clone)]
@@ -8,7 +13,13 @@ pub struct GraphQueryClient {
 
 impl Default for GraphQueryClient {
     fn default() -> Self {
-        Self { client: reqwest::Client::new() }
+        let client = reqwest::Client::builder()
+            .connect_timeout(Duration::from_secs(5))
+            .timeout(Duration::from_secs(10))
+            .pool_max_idle_per_host(0)
+            .build()
+            .expect("failed to create graph query client");
+        Self { client }
     }
 }
 
@@ -22,18 +33,62 @@ impl GraphQueryClient {
         subgraph_url: &str,
         query: &str,
     ) -> anyhow::Result<serde_json::Value> {
-        let response = self
-            .client
-            .post(subgraph_url)
-            .json(&serde_json::json!({
-                "query": query
-            }))
-            .send()
-            .await?
-            .json::<serde_json::Value>()
-            .await
-            .map_err(|err| anyhow::format_err!("{err}"))?;
-        Ok(response["data"].clone())
+        let payload = serde_json::json!({
+            "query": query
+        });
+
+        let mut last_err: Option<anyhow::Error> = None;
+        for attempt in 1..=GRAPH_QUERY_RETRY_MAX_ATTEMPTS {
+            let result = self
+                .client
+                .post(subgraph_url)
+                .header(reqwest::header::CONNECTION, "close")
+                .json(&payload)
+                .send()
+                .await;
+
+            match result {
+                Ok(resp) => {
+                    let status = resp.status();
+                    let body = resp.text().await.unwrap_or_else(|_| String::new());
+                    if !status.is_success() {
+                        let err = anyhow::format_err!(
+                            "graph query failed, status: {}, body: {}",
+                            status,
+                            body
+                        );
+                        if attempt < GRAPH_QUERY_RETRY_MAX_ATTEMPTS {
+                            let delay = GRAPH_QUERY_RETRY_BASE_DELAY_MS * attempt as u64;
+                            sleep(Duration::from_millis(delay)).await;
+                            last_err = Some(err);
+                            continue;
+                        }
+                        return Err(err);
+                    }
+
+                    let response = serde_json::from_str::<serde_json::Value>(&body)
+                        .map_err(|err| anyhow::format_err!("invalid graph json response: {err}"))?;
+
+                    if let Some(errors) = response.get("errors") {
+                        return Err(anyhow::format_err!("graph query returned errors: {errors}"));
+                    }
+
+                    return Ok(response["data"].clone());
+                }
+                Err(err) => {
+                    let reqwest_err = anyhow::format_err!("graph request failed: {err:#}");
+                    if attempt < GRAPH_QUERY_RETRY_MAX_ATTEMPTS {
+                        let delay = GRAPH_QUERY_RETRY_BASE_DELAY_MS * attempt as u64;
+                        sleep(Duration::from_millis(delay)).await;
+                        last_err = Some(reqwest_err);
+                        continue;
+                    }
+                    return Err(reqwest_err);
+                }
+            }
+        }
+
+        Err(last_err.unwrap_or_else(|| anyhow::format_err!("unknown graph query error")))
     }
 
     pub async fn get_sync_block_height(&self, subgraph_url: &str) -> anyhow::Result<Option<i64>> {
diff --git a/node/src/scheduled_tasks/event_watch_task.rs b/node/src/scheduled_tasks/event_watch_task.rs
index 800c7f0c..484106c4 100644
--- a/node/src/scheduled_tasks/event_watch_task.rs
+++ b/node/src/scheduled_tasks/event_watch_task.rs
@@ -977,9 +977,16 @@ pub async fn fetch_history_events(
                 .await
             {
                 Ok(Some(v)) => v,
-                Ok(None) | Err(_) => {
+                Ok(None) => {
                     warn!(
-                        "fetch_history_events:fail to get graph sync block height, will try later"
+                        "fetch_history_events:fail to get graph sync block height, will try later, empty value returned"
+                    );
+                    sleep(Duration::from_millis(500)).await;
+                    continue;
+                }
+                Err(e) => {
+                    warn!(
+                        "fetch_history_events:fail to get graph sync block height, will try later, err:{e:#}"
                     );
                     sleep(Duration::from_millis(500)).await;
                     continue;
@@ -1089,14 +1096,24 @@ pub async fn monitor_events_item(
     .await?;
     let query_client = GraphQueryClient::new();
     // let current_finalized = goat_client.get_finalized_block_number().await?;
-    let current_finalized =
-        match query_client.get_sync_block_height(&watch_contract.the_graph_url).await {
-            Ok(Some(v)) => v,
-            Ok(None) | Err(_) => {
-                warn!("monitor_events_item:fail to get graph sync block height, will try later");
-                return Ok(());
-            }
-        };
+    let current_finalized = match query_client
+        .get_sync_block_height(&watch_contract.the_graph_url)
+        .await
+    {
+        Ok(Some(v)) => v,
+        Ok(None) => {
+            warn!(
+                "monitor_events_item:fail to get graph sync block height, will try later, empty value returned"
+            );
+            return Ok(());
+        }
+        Err(e) => {
+            warn!(
+                "monitor_events_item:fail to get graph sync block height, will try later, err:{e:#}"
+            );
+            return Ok(());
+        }
+    };
 
     if watch_contract.from_height == 0 || watch_contract.from_height >= current_finalized {
         warn!(
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
index 62c3c938..57d75fdb 100644
--- a/rust-toolchain.toml
+++ b/rust-toolchain.toml
@@ -1,3 +1,3 @@
 [toolchain]
-channel = "nightly-2025-06-30"
+channel = "nightly-2025-09-15"
 components = ["rustfmt", "clippy"]