diff --git a/crates/rpc/rpc-engine-api/src/engine_api.rs b/crates/rpc/rpc-engine-api/src/engine_api.rs
index 1654519912..ae039b4ac9 100644
--- a/crates/rpc/rpc-engine-api/src/engine_api.rs
+++ b/crates/rpc/rpc-engine-api/src/engine_api.rs
@@ -29,7 +29,10 @@ use reth_rpc_api::{EngineApiServer, IntoEngineApiRpcModule};
 use reth_storage_api::{BlockReader, HeaderProvider, StateProviderFactory};
 use reth_tasks::TaskSpawner;
 use reth_transaction_pool::TransactionPool;
-use std::{sync::Arc, time::Instant};
+use std::{
+    sync::Arc,
+    time::{Instant, SystemTime},
+};
 use tokio::sync::oneshot;
 use tracing::{debug, trace, warn};
 
@@ -752,6 +755,15 @@ where
         &self,
         versioned_hashes: Vec<B256>,
     ) -> EngineApiResult<Vec<Option<BlobAndProofV1>>> {
+        // Only allow this method before Osaka fork
+        let current_timestamp =
+            SystemTime::now().duration_since(SystemTime::UNIX_EPOCH).unwrap_or_default().as_secs();
+        if self.inner.chain_spec.is_osaka_active_at_timestamp(current_timestamp) {
+            return Err(EngineApiError::EngineObjectValidationError(
+                reth_payload_primitives::EngineObjectValidationError::UnsupportedFork,
+            ));
+        }
+
         if versioned_hashes.len() > MAX_BLOB_LIMIT {
             return Err(EngineApiError::BlobRequestTooLarge { len: versioned_hashes.len() })
         }
@@ -787,6 +799,15 @@ where
         &self,
         versioned_hashes: Vec<B256>,
     ) -> EngineApiResult<Option<Vec<BlobAndProofV2>>> {
+        // Check if Osaka fork is active
+        let current_timestamp =
+            SystemTime::now().duration_since(SystemTime::UNIX_EPOCH).unwrap_or_default().as_secs();
+        if !self.inner.chain_spec.is_osaka_active_at_timestamp(current_timestamp) {
+            return Err(EngineApiError::EngineObjectValidationError(
+                reth_payload_primitives::EngineObjectValidationError::UnsupportedFork,
+            ));
+        }
+
         if versioned_hashes.len() > MAX_BLOB_LIMIT {
             return Err(EngineApiError::BlobRequestTooLarge { len: versioned_hashes.len() })
         }