diff --git a/packages/thirdweb/src/chains/chain-definitions/hashkey-testnet.ts b/packages/thirdweb/src/chains/chain-definitions/hashkey-testnet.ts
new file mode 100644
index 00000000000..4b8e006be4e
--- /dev/null
+++ b/packages/thirdweb/src/chains/chain-definitions/hashkey-testnet.ts
@@ -0,0 +1,22 @@
+import { defineChain } from "../utils.js";
+
+/**
+ * @chain
+ */
+export const HashkeyTestnet = /*@__PURE__*/ defineChain({
+  blockExplorers: [
+    {
+      name: "Hashkey Explorer",
+      url: "https://testnet-explorer.hsk.xyz",
+    },
+  ],
+  rpc: "https://testnet.hsk.xyz",
+  id: 133,
+  name: "Hashkey Testnet",
+  nativeCurrency: {
+    decimals: 18,
+    name: "HashKey Platform Token",
+    symbol: "HSK",
+  },
+  testnet: true,
+});
diff --git a/packages/thirdweb/src/chains/chain-definitions/hashkey.ts b/packages/thirdweb/src/chains/chain-definitions/hashkey.ts
new file mode 100644
index 00000000000..b615b05f09a
--- /dev/null
+++ b/packages/thirdweb/src/chains/chain-definitions/hashkey.ts
@@ -0,0 +1,21 @@
+import { defineChain } from "../utils.js";
+
+/**
+ * @chain
+ */
+export const Hashkey = /*@__PURE__*/ defineChain({
+  blockExplorers: [
+    {
+      name: "Hashkey Explorer",
+      url: "https://hashkey.blockscout.com/",
+    },
+  ],
+  rpc: "https://mainnet.hsk.xyz",
+  id: 177,
+  name: "Hashkey",
+  nativeCurrency: {
+    decimals: 18,
+    name: "HashKey Platform Token",
+    symbol: "HSK",
+  },
+});