diff --git a/candid/evm_rpc.did b/candid/evm_rpc.did
index a5e9e309..4f38aeee 100644
--- a/candid/evm_rpc.did
+++ b/candid/evm_rpc.did
@@ -132,7 +132,7 @@ type Metrics = record {
   responses : vec record { record { text; text; text }; nat64 };
   inconsistentResponses : vec record { record { text; text }; nat64 };
   cyclesCharged : vec record { record { text; text }; nat };
-  errHttpOutcall : vec record { record { text; text }; nat64 };
+  errHttpOutcall : vec record { record { text; text; RejectionCode }; nat64 };
 };
 type MultiFeeHistoryResult = variant {
   Consistent : FeeHistoryResult;
diff --git a/src/http.rs b/src/http.rs
index abb4701e..c89eb7c0 100644
--- a/src/http.rs
+++ b/src/http.rs
@@ -94,7 +94,7 @@ pub async fn http_request(
             Ok(response)
         }
         Err((code, message)) => {
-            add_metric_entry!(err_http_outcall, (rpc_method, rpc_host), 1);
+            add_metric_entry!(err_http_outcall, (rpc_method, rpc_host, code), 1);
             Err(HttpOutcallError::IcError { code, message }.into())
         }
     }
diff --git a/src/types.rs b/src/types.rs
index dca2292f..11833fe2 100644
--- a/src/types.rs
+++ b/src/types.rs
@@ -3,6 +3,7 @@ use crate::memory::get_api_key;
 use crate::util::hostname_from_url;
 use crate::validate::validate_api_key;
 use candid::CandidType;
+use ic_cdk::api::call::RejectionCode;
 use ic_cdk::api::management_canister::http_request::HttpHeader;
 use ic_stable_structures::storable::Bound;
 use ic_stable_structures::Storable;
@@ -115,6 +116,22 @@ impl MetricLabels for MetricHttpStatusCode {
     }
 }
 
+impl MetricLabels for RejectionCode {
+    fn metric_labels(&self) -> Vec<(&str, &str)> {
+        let code = match self {
+            RejectionCode::NoError => "NO_ERROR",
+            RejectionCode::SysFatal => "SYS_FATAL",
+            RejectionCode::SysTransient => "SYS_TRANSIENT",
+            RejectionCode::DestinationInvalid => "DESTINATION_INVALID",
+            RejectionCode::CanisterReject => "CANISTER_REJECT",
+            RejectionCode::CanisterError => "CANISTER_ERROR",
+            RejectionCode::Unknown => "UNKNOWN",
+        };
+
+        vec![("code", code)]
+    }
+}
+
 #[derive(Clone, Debug, Default, PartialEq, Eq, CandidType, Deserialize)]
 pub struct Metrics {
     pub requests: HashMap<(MetricRpcMethod, MetricRpcHost), u64>,
@@ -124,7 +141,7 @@ pub struct Metrics {
     #[serde(rename = "cyclesCharged")]
     pub cycles_charged: HashMap<(MetricRpcMethod, MetricRpcHost), u128>,
     #[serde(rename = "errHttpOutcall")]
-    pub err_http_outcall: HashMap<(MetricRpcMethod, MetricRpcHost), u64>,
+    pub err_http_outcall: HashMap<(MetricRpcMethod, MetricRpcHost, RejectionCode), u64>,
 }
 
 #[derive(Clone, Copy, Debug, PartialEq, Eq)]