diff --git a/_data/chains/eip155-4689.json b/_data/chains/eip155-4689.json
new file mode 100644
index 00000000..cf20a828
--- /dev/null
+++ b/_data/chains/eip155-4689.json
@@ -0,0 +1,19 @@
+{
+  "name": "IoTeX Network Mainnet",
+  "chain": "IOTX",
+  "network": "mainnet",
+  "rpc": [
+    "https://babel-api.mainnet.iotex.one"
+  ],
+  "faucets": [
+  ],
+  "nativeCurrency": {
+    "name": "IoTeX",
+    "symbol": "IOTX",
+    "decimals": 18
+  },
+  "infoURL": "https://iotex.io",
+  "shortName": "iotex-mainnet",
+  "chainId": 4689,
+  "networkId": 4689
+}
diff --git a/_data/chains/eip155-4690.json b/_data/chains/eip155-4690.json
new file mode 100644
index 00000000..574627b6
--- /dev/null
+++ b/_data/chains/eip155-4690.json
@@ -0,0 +1,19 @@
+{
+  "name": "IoTeX Network Testnet",
+  "chain": "IOTX",
+  "network": "testnet",
+  "rpc": [
+    "https://babel-api.testnet.iotex.one"
+  ],
+  "faucets": [
+  ],
+  "nativeCurrency": {
+    "name": "IoTeX",
+    "symbol": "IOTX",
+    "decimals": 18
+  },
+  "infoURL": "https://iotex.io",
+  "shortName": "iotex-testnet",
+  "chainId": 4690,
+  "networkId": 4690
+}