diff --git a/crates/network-primitives/src/lib.rs b/crates/network-primitives/src/lib.rs
index 6012668a3dd..c04f64444b2 100644
--- a/crates/network-primitives/src/lib.rs
+++ b/crates/network-primitives/src/lib.rs
@@ -10,7 +10,9 @@
 extern crate alloc;
 
 mod traits;
-pub use traits::{BlockResponse, HeaderResponse, ReceiptResponse, TransactionResponse};
+pub use traits::{
+    BlockResponse, HeaderResponse, OtterscanTxResp, ReceiptResponse, TransactionResponse,
+};
 
 mod block;
 pub use block::{BlockTransactionHashes, BlockTransactions, BlockTransactionsKind};
diff --git a/crates/network-primitives/src/traits.rs b/crates/network-primitives/src/traits.rs
index fe8dd988711..7e1fa82d6a2 100644
--- a/crates/network-primitives/src/traits.rs
+++ b/crates/network-primitives/src/traits.rs
@@ -62,6 +62,12 @@ pub trait ReceiptResponse {
     fn state_root(&self) -> Option<B256>;
 }
 
+/// Extension trait for [`TransactionResponse`] to support Otterscan-specific API.
+pub trait OtterscanTxResp: TransactionResponse {
+    /// Truncate the input for Otterscan API.
+    fn otterscan_api_truncate_input(&mut self);
+}
+
 /// Transaction JSON-RPC response.
 pub trait TransactionResponse {
     /// Signature type of the transaction
diff --git a/crates/rpc-types-eth/src/transaction/mod.rs b/crates/rpc-types-eth/src/transaction/mod.rs
index c1432f1d1da..9bb186b05a8 100644
--- a/crates/rpc-types-eth/src/transaction/mod.rs
+++ b/crates/rpc-types-eth/src/transaction/mod.rs
@@ -5,7 +5,7 @@ use alloy_consensus::{
     TxEnvelope, TxLegacy, TxType,
 };
 use alloy_eips::eip7702::SignedAuthorization;
-use alloy_network_primitives::TransactionResponse;
+use alloy_network_primitives::{OtterscanTxResp, TransactionResponse};
 use alloy_primitives::{Address, BlockHash, Bytes, ChainId, TxHash, TxKind, B256, U256};
 
 use alloc::vec::Vec;
@@ -338,6 +338,12 @@ impl TryFrom<Transaction> for TxEnvelope {
     }
 }
 
+impl OtterscanTxResp for Transaction {
+    fn otterscan_api_truncate_input(&mut self) {
+        self.input = self.input.slice(..4);
+    }
+}
+
 impl TransactionResponse for Transaction {
     type Signature = Signature;