diff --git a/change/@apibara-starknet-79e122c4-6fa1-458b-bef9-d5a2038f8670.json b/change/@apibara-starknet-79e122c4-6fa1-458b-bef9-d5a2038f8670.json
new file mode 100644
index 00000000..694cda1e
--- /dev/null
+++ b/change/@apibara-starknet-79e122c4-6fa1-458b-bef9-d5a2038f8670.json
@@ -0,0 +1,7 @@
+{
+  "type": "prerelease",
+  "comment": "starknet: add l2 gas price header prop",
+  "packageName": "@apibara/starknet",
+  "email": "francesco@ceccon.me",
+  "dependentChangeType": "patch"
+}
diff --git a/packages/starknet/proto/data.proto b/packages/starknet/proto/data.proto
index 3699d95d..d37b1753 100644
--- a/packages/starknet/proto/data.proto
+++ b/packages/starknet/proto/data.proto
@@ -50,6 +50,8 @@ message BlockHeader {
   ResourcePrice l1_data_gas_price = 9;
   // L1 data availability mode.
   L1DataAvailabilityMode l1_data_availability_mode = 10;
+  // Price of L2 gas in the block.
+  ResourcePrice l2_gas_price = 11;
 }
 
 // A transaction.
@@ -523,4 +525,4 @@ enum CallType {
   CALL_TYPE_LIBRARY_CALL = 1;
   CALL_TYPE_CALL = 2;
   CALL_TYPE_DELEGATE = 3;
-}
\ No newline at end of file
+}
diff --git a/packages/starknet/src/block.ts b/packages/starknet/src/block.ts
index d22aadb2..58928e62 100644
--- a/packages/starknet/src/block.ts
+++ b/packages/starknet/src/block.ts
@@ -182,6 +182,7 @@ export type DataAvailabilityMode = CodecType<typeof DataAvailabilityMode>;
  * @prop l1GasPrice Calldata gas price.
  * @prop l1DataGasPrice Blob gas price.
  * @prop l1DataAvailabilityMode How data is posted to L1.
+ * @prop l2GasPrice L2 gas price.
  */
 export const BlockHeader = MessageCodec({
   blockHash: OptionalCodec(FieldElement),
@@ -194,6 +195,7 @@ export const BlockHeader = MessageCodec({
   l1GasPrice: RequiredCodec(ResourcePrice),
   l1DataGasPrice: RequiredCodec(ResourcePrice),
   l1DataAvailabilityMode: RequiredCodec(L1DataAvailabilityMode),
+  l2GasPrice: OptionalCodec(ResourcePrice),
 });
 
 export type BlockHeader = Readonly<CodecType<typeof BlockHeader>>;
diff --git a/packages/starknet/src/proto/data.ts b/packages/starknet/src/proto/data.ts
index 955a0c0b..1425a189 100644
--- a/packages/starknet/src/proto/data.ts
+++ b/packages/starknet/src/proto/data.ts
@@ -346,7 +346,11 @@ export interface BlockHeader {
     | ResourcePrice
     | undefined;
   /** L1 data availability mode. */
-  readonly l1DataAvailabilityMode?: L1DataAvailabilityMode | undefined;
+  readonly l1DataAvailabilityMode?:
+    | L1DataAvailabilityMode
+    | undefined;
+  /** Price of L2 gas in the block. */
+  readonly l2GasPrice?: ResourcePrice | undefined;
 }
 
 /** A transaction. */
@@ -1088,6 +1092,7 @@ function createBaseBlockHeader(): BlockHeader {
     l1GasPrice: undefined,
     l1DataGasPrice: undefined,
     l1DataAvailabilityMode: 0,
+    l2GasPrice: undefined,
   };
 }
 
@@ -1126,6 +1131,9 @@ export const BlockHeader = {
     if (message.l1DataAvailabilityMode !== undefined && message.l1DataAvailabilityMode !== 0) {
       writer.uint32(80).int32(message.l1DataAvailabilityMode);
     }
+    if (message.l2GasPrice !== undefined) {
+      ResourcePrice.encode(message.l2GasPrice, writer.uint32(90).fork()).ldelim();
+    }
     return writer;
   },
 
@@ -1206,6 +1214,13 @@ export const BlockHeader = {
 
           message.l1DataAvailabilityMode = reader.int32() as any;
           continue;
+        case 11:
+          if (tag !== 90) {
+            break;
+          }
+
+          message.l2GasPrice = ResourcePrice.decode(reader, reader.uint32());
+          continue;
       }
       if ((tag & 7) === 4 || tag === 0) {
         break;
@@ -1229,6 +1244,7 @@ export const BlockHeader = {
       l1DataAvailabilityMode: isSet(object.l1DataAvailabilityMode)
         ? l1DataAvailabilityModeFromJSON(object.l1DataAvailabilityMode)
         : 0,
+      l2GasPrice: isSet(object.l2GasPrice) ? ResourcePrice.fromJSON(object.l2GasPrice) : undefined,
     };
   },
 
@@ -1264,6 +1280,9 @@ export const BlockHeader = {
     if (message.l1DataAvailabilityMode !== undefined && message.l1DataAvailabilityMode !== 0) {
       obj.l1DataAvailabilityMode = l1DataAvailabilityModeToJSON(message.l1DataAvailabilityMode);
     }
+    if (message.l2GasPrice !== undefined) {
+      obj.l2GasPrice = ResourcePrice.toJSON(message.l2GasPrice);
+    }
     return obj;
   },
 
@@ -1294,6 +1313,9 @@ export const BlockHeader = {
       ? ResourcePrice.fromPartial(object.l1DataGasPrice)
       : undefined;
     message.l1DataAvailabilityMode = object.l1DataAvailabilityMode ?? 0;
+    message.l2GasPrice = (object.l2GasPrice !== undefined && object.l2GasPrice !== null)
+      ? ResourcePrice.fromPartial(object.l2GasPrice)
+      : undefined;
     return message;
   },
 };