diff --git a/package.json b/package.json
index a6e9cf0d5..a92985768 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "opensea-js",
-  "version": "7.1.13",
+  "version": "7.1.14",
   "description": "TypeScript SDK for the OpenSea marketplace helps developers build new experiences using NFTs and our marketplace data",
   "license": "MIT",
   "author": "OpenSea Developers",
diff --git a/src/types.ts b/src/types.ts
index bbd939539..3de787041 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -123,6 +123,7 @@ export enum Chain {
   Zora = "zora",
   /** Sei */
   Sei = "sei",
+  B3 = "b3",
 
   // Testnet Chains
   // ⚠️NOTE: When adding to this list, also add to the util function `isTestChain`
@@ -148,6 +149,7 @@ export enum Chain {
   ZoraSepolia = "zora_sepolia",
   /** Sei Testnet */
   SeiTestnet = "sei_testnet",
+  B3_Sepolia = "b3_sepolia",
 }
 
 /**
diff --git a/src/utils/utils.ts b/src/utils/utils.ts
index 369a8798e..1ac7ee314 100644
--- a/src/utils/utils.ts
+++ b/src/utils/utils.ts
@@ -5,10 +5,10 @@ import {
 } from "@opensea/seaport-js/lib/constants";
 import { ethers, FixedNumber } from "ethers";
 import {
+  FIXED_NUMBER_100,
   MAX_EXPIRATION_MONTHS,
-  SHARED_STOREFRONT_LAZY_MINT_ADAPTER_CROSS_CHAIN_ADDRESS,
   SHARED_STOREFRONT_ADDRESSES,
-  FIXED_NUMBER_100,
+  SHARED_STOREFRONT_LAZY_MINT_ADAPTER_CROSS_CHAIN_ADDRESS,
 } from "../constants";
 import {
   Chain,
@@ -212,6 +212,10 @@ export const getChainId = (chain: Chain) => {
       return "1329";
     case Chain.SeiTestnet:
       return "1328";
+    case Chain.B3:
+      return "8333";
+    case Chain.B3_Sepolia:
+      return "1993";
     default:
       throw new Error(`Unknown chainId for ${chain}`);
   }
@@ -257,6 +261,10 @@ export const getWETHAddress = (chain: Chain) => {
       return "0xe30fedd158a2e3b13e9badaeabafc5516e95e8c7";
     case Chain.SeiTestnet:
       return "0x3921ea6cf927be80211bb57f19830700285b0ada";
+    case Chain.B3:
+      return "0x4200000000000000000000000000000000000006";
+    case Chain.B3_Sepolia:
+      return "0x4200000000000000000000000000000000000006";
     default:
       throw new Error(`Unknown WETH address for ${chain}`);
   }
@@ -321,6 +329,7 @@ export const isTestChain = (chain: Chain): boolean => {
     case Chain.SolanaDevnet:
     case Chain.ZoraSepolia:
     case Chain.SeiTestnet:
+    case Chain.B3_Sepolia:
       return true;
     default:
       return false;