diff --git a/constants/additionalChainRegistry/chainid-42429.js b/constants/additionalChainRegistry/chainid-42429.js
new file mode 100644
index 0000000000..a5e9afe8ed
--- /dev/null
+++ b/constants/additionalChainRegistry/chainid-42429.js
@@ -0,0 +1,24 @@
+export const data = {
+  name: "Tempo Testnet",
+  chain: "Tempo Testnet",
+  icon: "tempotestnet",
+  rpc: ["https://rpc.testnet.tempo.xyz/"],
+  faucets: ["https://docs.tempo.xyz"],
+  nativeCurrency: {
+    name: "USD",
+    symbol: "USD",
+    decimals: 6,
+  },
+  infoURL: "https://tempo.xyz/",
+  shortName: "tempotestnet",
+  chainId: 42429,
+  networkId: 42429,
+  explorers: [
+    {
+      name: "Tempo Testnet explorer",
+      url: "https://explorer.tempo.xyz",
+      standard: "EIP3091",
+    },
+  ],
+  status: "active",
+};